[go: up one dir, main page]

WO2018147196A1 - Dispositif d'affichage, récepteur de télévision, procédé de traitement vidéo, procédé de commande de rétroéclairage, dispositif de réception, dispositif de génération de signal vidéo, dispositif de transmission, système de transmission de signal vidéo, procédé de réception, programme, programme de commande et support d'enregistrement - Google Patents

Dispositif d'affichage, récepteur de télévision, procédé de traitement vidéo, procédé de commande de rétroéclairage, dispositif de réception, dispositif de génération de signal vidéo, dispositif de transmission, système de transmission de signal vidéo, procédé de réception, programme, programme de commande et support d'enregistrement Download PDF

Info

Publication number
WO2018147196A1
WO2018147196A1 PCT/JP2018/003667 JP2018003667W WO2018147196A1 WO 2018147196 A1 WO2018147196 A1 WO 2018147196A1 JP 2018003667 W JP2018003667 W JP 2018003667W WO 2018147196 A1 WO2018147196 A1 WO 2018147196A1
Authority
WO
WIPO (PCT)
Prior art keywords
luminance
unit
conversion
display
video signal
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/JP2018/003667
Other languages
English (en)
Japanese (ja)
Inventor
下田　裕紀
靖 手塚
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Sharp Corp
Original Assignee
Sharp Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from JP2017022039A external-priority patent/JP2018128594A/ja
Priority claimed from JP2017022034A external-priority patent/JP6466488B2/ja
Priority claimed from JP2017022038A external-priority patent/JP6381701B2/ja
Application filed by Sharp Corp filed Critical Sharp Corp
Publication of WO2018147196A1 publication Critical patent/WO2018147196A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Images

Classifications

    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
    • G09G3/34—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
    • G09G3/34—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source
    • G09G3/36—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source using liquid crystals
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G5/00—Control arrangements or circuits for visual indicators common to cathode-ray tube indicators and other visual indicators
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
    • H04N21/43—Processing of content or additional data, e.g. demultiplexing additional data from a digital video stream; Elementary client operations, e.g. monitoring of home network or synchronising decoder's clock; Client middleware
    • H04N21/431—Generation of visual interfaces for content selection or interaction; Content or additional data rendering
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
    • H04N21/43—Processing of content or additional data, e.g. demultiplexing additional data from a digital video stream; Elementary client operations, e.g. monitoring of home network or synchronising decoder's clock; Client middleware
    • H04N21/435—Processing of additional data, e.g. decrypting of additional data, reconstructing software from modules extracted from the transport stream
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N5/00—Details of television systems
    • H04N5/44—Receiver circuitry for the reception of television signals according to analogue transmission standards
    • H04N5/57—Control of contrast or brightness

Definitions

  • the present invention relates to a video processing device and a receiving device that switch a conversion function between a gradation value and a luminance value.
  • HDR High Dynamic Range
  • SDR Standard Dynamic Range
  • Patent Document 1 discloses that an original image is divided into video from which subtitles are extracted and information of subtitles that are extracted, and the divided information is interpolated and expanded. A circuit for synthesizing after performing reduction processing is disclosed.
  • HDR High Dynamic Range
  • PQ Physical Uplink Quantization
  • HLG High Dynamic Range
  • a technique for converting a gradation value indicated by the video signal into a luminance value is generalized. According to such a technique, it is possible to display a high-contrast image by displaying an image with appropriate luminance based on an HDR signal having a large number of gradations.
  • the gradation value may not be accurately converted into a luminance value.
  • the receiving device may not be able to display an appropriate video desired by the user.
  • Patent Document 1 when there is subtitle information in the video, the subtitle is extracted from the original image, divided into a video and subtitle extracted from the subtitle, and image processing is performed on each of the video and the subtitle. A technique for later synthesis is described. The technology is described.
  • One aspect of the present invention has been made in view of the above-described problems, and an object thereof is to display an image with a more appropriate luminance according to a video signal in a technology for adjusting the luminance.
  • a display device includes a plurality of conversion units that set luminance values from gradation values indicated by a video signal of a display target image, and the luminance of the video signal.
  • a video processing method is a video processing method by a display device having a plurality of conversion units for setting a luminance value from a gradation value indicated by a video signal of a display target image.
  • the conversion means is switched with reference to the luminance level of the image.
  • a display device includes a backlight that includes a plurality of areas and can individually control the brightness of the plurality of areas, and a backlight control unit that controls the backlight.
  • the backlight control unit makes the brightness of the corresponding area corresponding to the area including the artificial display object in the display target image different from the brightness of the other areas.
  • a video processing method includes a backlight that includes a plurality of areas and that can individually control the brightness of the plurality of areas, and controls the backlight.
  • a receiving device is a receiving device that receives a video signal including video data and metadata, and transmits information on the maximum luminance of the content indicated by the video data to one content.
  • a plurality of acquisition units, and a conversion unit that converts the luminance of the video indicated by the video data with reference to at least one of the plurality of pieces of information about the maximum luminance acquired by the acquisition unit.
  • a video signal generation device is a video signal generation device that generates a video signal including video data and metadata, and includes information on the maximum luminance of content indicated by the video data.
  • a metadata generation unit that generates a plurality of metadata for the content.
  • a video signal transmission system is a video signal transmission system including a transmission device and a reception device, and the transmission device transmits a video signal including video data and metadata.
  • a metadata generation unit that generates metadata including a plurality of pieces of information regarding the maximum luminance of the content indicated by the video data for one content, and the receiving device receives the video signal.
  • the acquisition unit that acquires a plurality of pieces of information regarding the maximum luminance of the content indicated by the video data with respect to one content, and at least one of the plurality of pieces of information about the maximum luminance acquired by the acquisition unit is referred to A conversion unit that performs luminance conversion of the video indicated by the video data.
  • a reception method is a reception method for receiving a video signal including video data and metadata, and information on the maximum luminance of the content indicated by the video data is received for one content.
  • a video can be displayed with a more appropriate luminance according to a video signal in the technology for adjusting the luminance.
  • FIG. 1 It is a block diagram which shows the structure of the display apparatus which concerns on Embodiment 1 of this invention. It is a figure which shows the external appearance of the television receiver provided with the display apparatus which concerns on Embodiment 1 of this invention. It is a flowchart explaining the video processing method which concerns on Embodiment 1 of this invention.
  • A) is a front view which shows the external appearance of the display apparatus which is displaying the display target image containing a caption.
  • (B) is a graph which shows the PQ curve of the display target image which the display apparatus shown to (a) of FIG. 4 displays. It is a block diagram which shows the structure of the display apparatus which concerns on Embodiment 2 of this invention.
  • switching tone mapping means switching a method for converting a gradation value indicated by a video signal into a luminance value used when displaying a video.
  • FIG. 1 is a block diagram illustrating a configuration of a display device 1 according to the present embodiment.
  • FIG. 2 is a front view showing an appearance of a television receiver including the display device 1.
  • the display device 1 includes a video processing unit 2, a backlight 7, and a display unit 8.
  • the video processing unit 2 is a member that performs conversion (tone mapping) between a gradation value and a luminance value indicated by the video signal using a conversion function (conversion means in the claims), and includes a caption detection unit 3 and a switching unit 4.
  • a conversion unit 5 and a backlight control unit 6 are provided.
  • the caption detection unit 3 detects an artificial display object (caption in this embodiment) in the display target image indicated by the video signal acquired from the outside, and artificially detects the luminance data (gradation value) of the display target image. Luminance data of a corrected image obtained by excluding luminance data of a region including a display object is generated.
  • the switching unit 4 switches the conversion function used in the conversion unit 5 according to the luminance level of the corrected image generated by the caption detection unit 3.
  • the conversion unit 5 converts the gradation value of the corrected image into a luminance value using the conversion function switched by the switching unit 4 (specifically, used when displaying video from the gradation value indicated by the video signal). Conversion to luminance value (tone mapping)).
  • the backlight control unit 6 controls the luminance of each area of the backlight 7 corresponding to the corrected image displayed on the display unit 8 to the luminance value converted by the conversion unit 5. In addition, the backlight control unit 6 sets the luminance of each area of the backlight 7 corresponding to the region including the artificial display object displayed by the display unit 8 (the region detected by the caption detection unit 3) of other areas.
  • the brightness value is controlled to be different from the brightness (local dimming).
  • the backlight 7 is composed of a plurality of areas, the brightness of the plurality of areas can be individually controlled, and the display unit 8 is irradiated with light based on the control by the backlight control unit 6.
  • the display unit 8 is a non-luminous display and displays a display target image indicated by a video signal (RGB data excluding luminance data).
  • a liquid crystal display etc. are mentioned as an example of a non-light-emitting display.
  • a configuration using the non-light emitting display unit 8 and the backlight 7 is shown. However, each area of the backlight 7 corresponding to the region including the artificial display object displayed on the display unit 8 is displayed.
  • the configuration (local dimming) for controlling the brightness to be different from the brightness of other areas is not adopted, only the self-luminous display is used as the display unit 8 without using the backlight 7. May be.
  • the self-luminous display include an organic EL display, a plasma display, and an LED display.
  • FIG. 3 is a flowchart showing the flow of the backlight control method of the display device 1.
  • description of the control of the display unit 8 is omitted.
  • the caption detection unit 3 detects captions in a display target image indicated by an externally acquired video signal, and brightness data of an area including an artificial display object from brightness data (gradation value) of the display target image.
  • the brightness data of the corrected image obtained by excluding is generated (step S0).
  • the caption detection unit 3 performs image processing such as edge detection using a filter on a display target image indicated by a video signal acquired from the outside, and excludes luminance data of a region including an artificial display object. be able to.
  • image processing such as edge detection using a filter on a display target image indicated by a video signal acquired from the outside
  • luminance data of a region including an artificial display object be able to.
  • the specific process of excluding the luminance data of the area including the artificial display object is not limited to the present embodiment.
  • the HDR signal may be an HDMI signal based on the HDMI (registered trademark) (High-Definition Multimedia Interface) standard, a Tuner signal (a signal received by a tuner), or the like.
  • the artificial display object detected by the caption detection unit 3 refers to a display object artificially created by CG (Computer Graphics) or the like, and is an object synthesized or added to the content video of the display target image. It can be. Examples of such objects include subtitles, logos (channel display), and control panels (OSDs that are superimposed on the transmission side such as STB and BD).
  • CG Computer Graphics
  • OSDs that are superimposed on the transmission side such as STB and BD).
  • the switching unit 4 switches the conversion function used in the conversion unit 5 according to the luminance level of the luminance data of the corrected image generated by the caption detection unit 3 (step S1).
  • the luminance level that the switching unit 4 refers to in order to switch the conversion function the maximum gradation value or the average value of the gradation values in the luminance data of the corrected image can be cited.
  • the conversion unit 5 converts the gradation value of the corrected image into a luminance value using the conversion function switched by the switching unit 4 (step S2).
  • the backlight control unit 6 controls the luminance value of each area of the backlight 7 corresponding to the corrected image displayed on the display unit 8 to the luminance value converted by the conversion unit 5 (step S3).
  • step S3 the backlight control unit 6 determines the luminance of each area of the backlight 7 corresponding to the region including the artificial display object displayed by the display unit 8 (the region detected by the caption detection unit 3).
  • the brightness value is controlled to be different from the brightness of other areas.
  • the backlight control unit adjusts the brightness (brightness) of the area corresponding to the region including the artificial display object displayed on the display unit 8 according to the gradation of the artificial display object. It is preferable that the brightness is different.
  • the video processing unit 2 includes the conversion unit 5, and the conversion unit 5 converts the gradation value of the corrected image into a luminance value using the conversion function switched by the switching unit 4.
  • the video processing unit 2 only needs to have a plurality of conversion means for setting the luminance value from the gradation value of the corrected image instead of using the conversion function (in this embodiment, a plurality of The switching unit 4 has only to switch the conversion unit according to the luminance level of the corrected image.
  • the video processing unit 2 has a table indicating correspondence between gradation values and luminance values in order to set luminance values from the gradation values of the corrected image, and the switching unit 4 displays the luminance level of the corrected image.
  • the table to be referenced may be switched depending on
  • steps S0 to S2 may be omitted in the above processing. Even with such a configuration, the effect of displaying a video with a more appropriate luminance in accordance with the video signal, more specifically, even if the display target image includes an artificial display object, There is an effect that an image can be displayed with luminance.
  • FIG. 4A is a front view showing an appearance of the display device 1 displaying a display target image including subtitles.
  • FIG. 4B is a graph showing a PQ curve of the display target image displayed by the display device 1 shown in FIG.
  • the horizontal axis represents the gradation value before conversion
  • the vertical axis represents the luminance value after conversion (luminance when displaying an image).
  • the display unit 8 displays the corrected image A and the caption B obtained by excluding the luminance data of the area including the caption.
  • the caption detection unit 3 detects the caption B in the display target image indicated by the video signal acquired from the outside, and the region including the caption B from the luminance data (gradation value) of the display target image.
  • the brightness data of the corrected image A obtained by excluding the brightness data is generated.
  • the switching unit 4 uses the PQ curve (EOTF according to SMPTE-ST2084) in which the graph of the gradation value before conversion and the luminance value after conversion corresponds to the maximum luminance level of the corrected image A. Switch to a conversion function that converts to the curve shown by. More specifically, the switching unit 4 converts the gradation value into a luminance value so that the luminance value corresponding to the maximum gradation value indicated by the video signal becomes a value of a predetermined maximum luminance level C. Switch to conversion function.
  • the predetermined maximum luminance level C may be an arbitrary value set in advance, but is set according to the luminance range that the video signal can take and the luminance range of the light that the backlight 7 can irradiate. Is preferred.
  • An example of a specific value of the predetermined maximum luminance level C is 1000 nit.
  • step S2 the conversion unit 5 converts the gradation value of the corrected image A into a luminance value using the conversion function switched by the switching unit 4.
  • step S ⁇ b> 3 the backlight control unit 6 controls the luminance of each area of the backlight 7 corresponding to the corrected image A displayed on the display unit 8 to the luminance value converted by the conversion unit 5. Further, the backlight control unit 6 controls the luminance value of each area of the backlight 7 corresponding to the caption B displayed on the display unit 8 to a luminance value different from the luminance of the corrected image A.
  • the gradation value corresponding to the caption B is larger than the gradation value corresponding to the corrected image A, and the switching unit 4 sets the maximum gradation value in the caption B in step S1 described above.
  • the PQ curve formed by the gradation value before conversion and the luminance value after conversion becomes like the dotted line in FIG. 4B, and the image becomes dark. .
  • step S1 the switching unit 4 switches the conversion function with reference to the maximum gradation value of the corrected image A excluding the caption B from the display target image.
  • the PQ curve formed by the gradation value before conversion and the luminance value after conversion becomes as shown by the solid line in FIG. 4B, and an image can be displayed with more appropriate luminance according to the video signal. it can.
  • the backlight control unit 6 controls the luminance of each area of the backlight 7 corresponding to the caption B displayed on the display unit 8 to be lower than the luminance of the corrected image A.
  • the video processing method according to the present embodiment is effective when the gradation value corresponding to the caption B is smaller than the gradation value corresponding to the corrected image A.
  • the brightness of the corrected image A displayed by the display unit 8 is compared with the case where the subtitle B is not removed by switching the conversion function with reference to the maximum gradation value of the corrected image A excluding the subtitle B.
  • the backlight control unit 6 may control the luminance of each area of the backlight 7 corresponding to the caption B displayed on the display unit 8 to be higher than the luminance of the corrected image A.
  • an example of an absolute luminance method (including a PQ method) is shown as a luminance method when converting from a gradation value to a luminance value, but a relative luminance method (an HLG method or the like) is used as the luminance method. May be adopted. Even in that case, it is possible to achieve the same effect as the display device 1 according to the present embodiment.
  • the PQ curve is set to MAX CLL (for example, 10,000 nits) as the maximum luminance value.
  • MAX CLL for example, 10,000 nits
  • the optimum image quality can be supplied.
  • the white character of the subtitle current UHD-BD is set to 128/255 which is half of normal data
  • this subtitle portion is detected as the peak luminance and PQ Create a curve.
  • the luminance of the subtitle portion is added, and the average luminance data cannot be obtained accurately. For this reason, it is not possible to display an image with the optimum brightness desired by the user.
  • the display device 1 switches the conversion means with reference to the luminance level of the corrected image obtained by excluding the region including the artificial display object from the display target image. Accordingly, the luminance value can be set from the gradation value by the conversion unit according to the luminance level of the corrected image excluding an artificial display object that may greatly change the maximum luminance level or the average luminance level. .
  • the tone mapping method is switched with reference to the maximum luminance level or the average luminance level, the influence of the luminance of the artificial display object on the maximum luminance level or the average luminance level can be suppressed. Therefore, it is possible to display an image with a more appropriate luminance according to the image signal.
  • Embodiment 2 of the present invention will be described below with reference to FIGS. 5 and 6.
  • members having the same functions as those described in the first embodiment are denoted by the same reference numerals and description thereof is omitted.
  • FIG. 5 is a block diagram illustrating a configuration of the display device 10 according to the present embodiment. As illustrated in FIG. 5, the display device 10 further includes a reception unit 12 of the video processing unit 11 in addition to the configuration of the display device 1 according to the first embodiment.
  • the accepting unit 12 accepts selection by the user as to whether or not to execute the function of switching the conversion means with reference to the brightness level of the corrected image. In addition, the reception unit 12 determines whether or not to execute a function of making the brightness of the area (corresponding area) corresponding to the area including the artificial display object in the display target image different from the brightness of the other areas. Accepts selection by.
  • FIG. 6 is a flowchart showing the flow of the video processing method executed by the display device 10. Note that description of steps similar to those described in Embodiment 1 is omitted.
  • the accepting unit 12 accepts a selection by the user as to whether or not to execute the function of switching the conversion means with reference to the brightness level of the corrected image (step S10). Further, in step S10, the reception unit 12 performs a function of making the brightness of the area (corresponding area) corresponding to the area including the artificial display object in the display target image different from the brightness of the other areas. The selection by the user is accepted.
  • step S10 when the artificial display object is a caption, a logo, or a control panel, the user sets whether or not to display these in the user menu, and the reception unit 12 receives the setting. And when the reception part 12 receives the setting which displays a subtitle, a logo, or a control panel, it progresses to the next process.
  • the reception unit 12 receives a setting for displaying a caption, a logo, or a control panel
  • the backlight control unit 6 displays an area (corresponding area) corresponding to an area including an artificial display object in the display target image. The backlight control unit 6 is instructed to execute a function of making the brightness different from the brightness of other areas.
  • the caption detection unit 3 detects the caption in the display target image indicated by the video signal acquired from the outside based on the user's selection received by the reception unit 12, and the luminance of the display target image. From the data (gradation value), the luminance data of the corrected image obtained by excluding the luminance data of the area including the artificial display object is generated (step S11).
  • the switching unit 4 switches the conversion function used in the conversion unit 5 in accordance with the luminance level of the luminance data of the corrected image generated by the caption detection unit 3 (step S12).
  • the conversion unit 5 converts the gradation value of the corrected image into a luminance value using the conversion function switched by the switching unit 4 (step S13).
  • the backlight control unit 6 controls the luminance value of each area of the backlight 7 corresponding to the corrected image displayed on the display unit 8 to the luminance value converted by the conversion unit 5 (step S14).
  • step S ⁇ b> 14 the backlight control unit 6 includes an artificial display object displayed on the display unit 8 based on the user selection received by the reception unit 12 (region detected by the caption detection unit 3).
  • the brightness of each area of the backlight 7 corresponding to is controlled to a brightness value different from the brightness of other areas.
  • steps S11 to S13 may be omitted in the above processing.
  • the effect of displaying a video with a more appropriate luminance in accordance with the video signal more specifically, even if the display target image includes an artificial display object, There is an effect that an image can be displayed with luminance.
  • the display device 10 accepts the selection by the user as to whether or not to execute the function of switching the conversion means with reference to the luminance level of the corrected image. Thereby, the user can select whether to switch the conversion means with reference to the luminance level of the corrected image.
  • the display device 10 determines whether or not to execute the function of making the brightness of the corresponding area corresponding to the area including the artificial display object in the display target image different from the brightness of the other areas. , Accepts selection by the user. This adjusts the brightness of the backlight corresponding to each area so that there is no unnatural boundary between the area containing the artificial display object and the area other than the area containing the artificial display object. Can do. Therefore, it is possible to display an image with a more appropriate luminance according to the image signal.
  • Embodiment 3 of the present invention will be described below with reference to FIG. Note that the video processing method according to the present embodiment can be executed by using the display device 1 according to the first embodiment. Therefore, for convenience of explanation, members having the same functions as those described in the first embodiment are denoted by the same reference numerals and description thereof is omitted.
  • FIG. 7 is a flowchart showing the flow of the video processing method executed by the display device 1. Note that description of steps similar to those described in Embodiment 1 is omitted.
  • the caption detection unit 3 determines the category, genre, or scene type of the display target image indicated by the video signal from the metadata included in the video signal acquired from the outside, and converts it with reference to the luminance level of the corrected image. It is determined whether or not to execute a function for switching means (step S20). When the caption detection unit 3 determines to execute the function of switching the conversion means with reference to the luminance level of the corrected image, the process proceeds to step S21. When the caption detection unit 3 determines not to execute the function of switching the conversion unit with reference to the luminance level of the corrected image, the process ends.
  • the caption detection unit 3 uses a display object whose category, genre, or scene is an artificial display object.
  • a category, genre, or scene that has a high possibility of being included, there is a method of determining to execute a function of switching conversion means with reference to the luminance level of the corrected image.
  • the subtitle detection unit 3 executes a function of switching the conversion means with reference to the luminance level of the corrected image.
  • the caption detection unit 3 further determines whether the scene of the display target image is indoor or outdoor, and based on the determination, the switching unit 4
  • the conversion function may be switched (for example, in conjunction with the average luminance of the display target image).
  • step S20 the caption detection unit 3 determines the category, genre, or scene type of the display target image indicated by the video signal from the metadata included in the video signal acquired from the outside, and artificially displays the image in the display target image. It is determined whether or not to execute a function of making the brightness of the corresponding area corresponding to the area including the display object different from the brightness of the other areas.
  • the determination method is the same as the method for determining whether to execute the function of switching the conversion means with reference to the luminance level of the corrected image. For this reason, the caption detection unit 3 performs a function of switching the conversion means with reference to the brightness level of the corrected image to determine whether to execute the function of making the brightness of the corresponding area different from the brightness of the other areas. It may be determined depending on whether or not to do so.
  • step S21 the caption detection unit 3 detects the caption in the display target image indicated by the video signal acquired from the outside, and includes an artificial display object from the luminance data (gradation value) of the display target image.
  • the brightness data of the corrected image obtained by excluding the brightness data of the area is generated (step S21).
  • the switching unit 4 switches the conversion function used in the conversion unit 5 in accordance with the luminance level of the luminance data of the corrected image generated by the caption detection unit 3 (step S22).
  • the conversion unit 5 converts the gradation value of the corrected image into a luminance value using the conversion function switched by the switching unit 4 (step S23).
  • the backlight control unit 6 controls the luminance value of each area of the backlight 7 corresponding to the corrected image displayed on the display unit 8 to the luminance value converted by the conversion unit 5 (step S24).
  • step S20 If it is determined in step S20 that the caption detection unit 3 performs the function of making the brightness of the corresponding area different from the brightness of the other areas, the backlight control unit 6 displays the display unit 8 in step S24.
  • the luminance of each area of the backlight 7 corresponding to the area including the artificial display object (area detected by the caption detection unit 3) displayed by is controlled to a luminance value different from the luminance of the other areas.
  • steps S21 to S23 may be omitted in the above processing.
  • step S20 executes the following process instead of the process described above.
  • Step S20a The caption detection unit 3 determines the category, genre, or scene type of the display target image indicated by the video signal from the metadata included in the video signal acquired from the outside.
  • Step S20b Subsequently, the brightness of each area of the backlight 7 corresponding to the area including the artificial display object displayed on the display unit 8 (the area detected by the caption detection unit 3) is different from the brightness of the other areas. Whether to control the brightness value is determined according to the determination result in step S20a. When it determines with controlling the backlight 7 as mentioned above, it progresses to step S24.
  • the effect of displaying a video with a more appropriate luminance in accordance with the video signal more specifically, even if the display target image includes an artificial display object, There is an effect that an image can be displayed with luminance.
  • suitable backlight control can be performed according to the category, genre, or scene of the display target image indicated by the video signal.
  • the display device 1 switches the conversion unit with reference to the luminance level of the corrected image according to the category, genre, or scene of the display target image.
  • the conversion means is switched with reference to the luminance level of the corrected image as necessary.
  • the conversion means can be switched.
  • the display device 1 makes the brightness of the corresponding area different from the brightness of other areas according to the category, genre, or scene of the display target image.
  • the brightness of the corresponding area is made different from the brightness of other areas as necessary. Local dimming can be performed.
  • control blocks of the display devices 1 and 10 are logic circuits formed in an integrated circuit (IC chip) or the like. (Hardware) or software using a CPU (Central Processing Unit).
  • the display devices 1 and 10 include a CPU that executes instructions of a program that is software that realizes each function, and a ROM (Read Only Memory) in which the program and various data are recorded so as to be readable by a computer (or CPU). ) Or a storage device (these are referred to as “recording media”), a RAM (Random Access Memory) that expands the program, and the like.
  • the computer or CPU
  • a “non-temporary tangible medium” such as a tape, a disk, a card, a semiconductor memory, a programmable logic circuit, or the like can be used.
  • the program may be supplied to the computer via an arbitrary transmission medium (such as a communication network or a broadcast wave) that can transmit the program.
  • an arbitrary transmission medium such as a communication network or a broadcast wave
  • one embodiment of the present invention can also be realized in the form of a data signal embedded in a carrier wave, in which the program is embodied by electronic transmission.
  • Video signal transmission system 100B A video signal transmission system 100B according to Embodiment 4 of the present invention will be described with reference to FIGS.
  • FIG. 8 is a block diagram showing a configuration of the video signal transmission system 100B according to the present embodiment. As shown in FIG. 8, the video signal transmission system 100B includes a transmission device 1B and a reception device 10B.
  • the transmission device 1B includes a video signal generation device 2B and a transmission unit 5B.
  • the transmission device 1B transmits a video signal including the video data and metadata generated by the video signal generation device 2B to the reception device 10B via the transmission unit 5B.
  • the transmission unit 5B transmits a video signal to the reception device 10B by performing wireless communication with the reception device 10B.
  • Examples of the transmitting device 1B include a broadcasting station such as a television station.
  • Video signal generator 2B The video signal generation device 2B generates a video signal including video data and metadata. As shown in FIG. 8, the video signal generation device 2B includes video data generation units 3B and 4B.
  • the video signal generation device 2B adds the metadata created by the metadata generation unit 4B to the video data generated by the video data generation unit 3B, and sends the video data to the transmission unit 5B.
  • an HDR signal is used as the video signal.
  • HDR signals include HDMI (registered trademark) signals based on the HDMI (registered trademark) (High-Definition Multimedia Interface) standard, Tuner signals (signals received by a tuner), and the like. be able to.
  • the HDR signal includes metadata such as MAX CLL indicating the maximum luminance level of content in addition to video data of character information including gradation values and captions taken by each image.
  • Video data generator 3B The video data generation unit 3B generates video data such as gradation values and subtitle information taken by each image.
  • the video data generation unit 3B generates video data to be transmitted as a video signal, for example, by converting video data acquired from the outside.
  • the metadata generation unit 4B generates metadata including a plurality of pieces of information regarding the maximum luminance of the content indicated by the video data for one content.
  • MAX CLL indicating the maximum luminance level of content including subtitles
  • MAX CLL indicating the maximum luminance level of content excluding subtitles
  • the metadata generation unit 4B generates metadata including information regarding the maximum luminance according to the case where the caption information is included and information regarding the maximum luminance according to the case where the caption information is not included. can do.
  • the receiving device 10B that has received the metadata generated by the metadata generation unit 4B can display a video with a more appropriate luminance corresponding to the video signal including the video data.
  • the metadata generation unit 4B generates a plurality of pieces of information related to the maximum luminance of the content, depending on whether or not caption information is included in the video data.
  • the present embodiment is not limited to this.
  • the metadata generation unit 4B may generate a plurality of pieces of information related to the maximum brightness of the content, depending on the condition other than whether or not caption information is included in the video data.
  • the metadata generation unit 4B may generate a plurality of pieces of information related to the maximum brightness of the content, depending on the condition other than whether or not caption information is included in the video data.
  • two pieces of information regarding MAX CLL and another maximum luminance can be used as the information regarding the maximum luminance.
  • an image can be displayed with a more appropriate luminance according to the image signal.
  • the metadata generation unit 4B may further generate information regarding another maximum luminance.
  • the information on the other maximum luminance for example, the maximum value of the luminance level corresponding to the gradation value taken by each pixel constituting each frame or each scene in the video signal can be mentioned.
  • the receiving device 10B includes an acquisition unit 11, a conversion unit 12B, a control unit 13B, and a display panel 14B.
  • FIG. 2 is a front view illustrating an appearance of the receiving device 10B. Examples of the receiving device 10B include a television receiver equipped with a tuner, an STB (Set Top Box), and the like.
  • the acquisition unit 11B receives the video signal transmitted from the transmission unit 5B of the transmission device 1B. Accordingly, the acquisition unit 11B receives a video signal including video data and metadata. In addition, the acquisition unit 11B acquires a plurality of pieces of information related to the maximum luminance of content indicated by video data included in the video signal. That is, the acquisition unit 11B acquires MAX CLL and MAX CLL (CHAROFF).
  • the conversion unit 12B performs luminance conversion of the video indicated by the video data with reference to one of the plurality of pieces of information regarding the maximum luminance acquired by the acquisition unit 11B.
  • the conversion unit 12B switches the conversion function by referring to MAX CLL or referring to information on MAX CLL (CHAROFF). Then, the conversion unit 12B performs conversion between the gradation value and the luminance value indicated by the video signal using the switched conversion function. For example, the conversion unit 12B performs conversion (tone mapping) from a gradation value indicated by the video signal to a luminance value used when displaying the video.
  • the conversion unit 12B refers to MAX CLL (CHAROFF) when the subtitle information is included in the video data in the video signal. Also, the conversion unit 12B refers to the MAX CLL when the caption data is not included in the video data in the video signal.
  • the conversion unit 12B refers to information regarding the maximum luminance of the appropriate content according to each of the case where the subtitle information is included in the video data and the case where the subtitle information is not included in the video data. be able to.
  • the receiving device 10B can display a video with a more appropriate luminance according to the video signal including the video data.
  • Control unit 13B and display panel 14B The control unit 13B controls the luminance of each pixel of the display panel 14B to the luminance value converted by the conversion unit 12B.
  • the display panel 14B may be realized by any device as long as it can display video. Examples of the display panel 14B include a liquid crystal display, an organic EL (Electro Luminescence) display, a plasma display, and a projector.
  • reception method A flow of a reception method executed by the reception device 10B according to the present embodiment will be described with reference to FIG. Transmission of the video signal to the receiving device 10B by the transmitting device 1B is performed in accordance with the description of each member described above, and the description thereof is omitted.
  • FIG. 10 is a flowchart showing the flow of the receiving method.
  • the receiving device 10B performs a reception process by executing steps S101B to S105B described below.
  • Step S101B acquisition step: As shown in FIG. 10, first, the reception device 10B receives a video signal from the transmission device 1B via the acquisition unit 11B. Further, the acquisition unit 11B acquires MAX CLL and MAX CLL (CHAROFF) included in the video signal. In this way, the acquisition unit 11B acquires a plurality of pieces of information regarding the maximum luminance. The acquisition unit 11B supplies information about the acquired maximum luminance to the conversion unit 12B.
  • MAX CLL and MAX CLL CHAROFF
  • Step S102B The conversion unit 12B confirms whether or not caption information is included in the video data in the video signal. If the conversion unit 12B determines that caption information is included (YES in step S102B), the process proceeds to step S103B. When the conversion unit 12B determines that no caption information is included (NO in step S102B), the process proceeds to step S104B. In step S103B and step S104B, examples of conversion functions used by the conversion unit 12B will be described later.
  • Step S103B conversion step: The conversion unit 12B performs conversion (tone mapping) between a gradation value and a luminance value indicated by the video signal with reference to information on MAX CLL (CHAROFF). Specifically, the conversion unit 12B performs conversion between a gradation value and a luminance value using a conversion function according to the format of the video signal (for example, a PQ curve indicated by EOTF according to SMPTE-ST 2084). Thereafter, the conversion unit 12B supplies the converted luminance value to the control unit 13B.
  • conversion step S103B conversion step
  • Step S104B conversion step: The conversion unit 12B performs conversion (tone mapping) between the gradation value and the luminance value indicated by the video signal with reference to information on the MAX CLL (conversion step). Specifically, the conversion unit 12B performs conversion between the gradation value and the luminance value using a conversion function according to the format of the video signal (for example, a conversion function according to SAMPLE-ST 2084). Thereafter, the conversion unit 12B supplies the converted luminance value to the control unit 13B.
  • conversion step S104B conversion step: The conversion unit 12B performs conversion (tone mapping) between the gradation value and the luminance value indicated by the video signal with reference to information on the MAX CLL (conversion step). Specifically, the conversion unit 12B performs conversion between the gradation value and the luminance value using a conversion function according to the format of the video signal (for example, a conversion function according to SAMPLE-ST 2084). Thereafter, the conversion unit 12B supplies the converted luminance value to the control unit 13B.
  • Step S105B The control unit 13B controls the luminance value of each pixel constituting the display panel 14B to the luminance value after conversion by the conversion unit 12B.
  • FIG. 11 is a graph showing the conversion (tone mapping) between the gradation value and the luminance value by the conversion function.
  • the horizontal axis represents the gradation value before conversion indicated by the video signal
  • the vertical axis represents the luminance value after conversion (luminance when displaying the video). Represents.
  • the solid curve shown in FIG. 11A is a conversion function that the conversion unit 12B generates with reference to MAX CLL (CHAROFF). As described above, when the caption data is included in the video data in the video signal, the conversion unit 12B refers to the conversion function generated with reference to MAX CLL (CHAROFF).
  • a conversion unit (not shown) that refers only to the MAX CLL corresponding to the maximum luminance level of content including subtitles performs tone mapping without using a plurality of conversion functions.
  • the above conversion unit refers to the MAX CLL corresponding to the maximum luminance level of the content including the caption even when the caption is displayed on the video. Therefore, for example, when a white caption is displayed on the video, this conversion unit may create a PQ curve with the brightness value of the white caption as the maximum brightness value MAX CLL.
  • this conversion unit refers to the maximum luminance value MAX CLL having a high value that matches the luminance value of the white caption. Then, the conversion unit switches the conversion function from the PQ curve indicated by the EOFT according to SAMPTE-ST2084, which is normally used, to another conversion function. Thereby, it switches to the PQ curve shown with the broken line of (a) of FIG.
  • the maximum luminance value (MAX CLL) of the content including subtitles is the maximum luminance value of the original content (of FIG. 11A).
  • MAX CLL CHAROFF
  • the value of the MAX CLL can take 1000 nit (cd / m 2 ), for example.
  • the luminance value in the dashed PQ curve is, for example, the original PQ curve at the gradation value X 1 (for example, 128) which is the same intermediate gradation value.
  • X 1 for example, 128
  • the results in a luminance value Y 1 is lower than the luminance value Y 2.
  • the conversion unit 12B even when captions or the like are displayed on the video, the conversion unit 12B, as shown in FIG. 11A, the maximum brightness value of the content excluding the captions as the maximum brightness value. Reference is made to MAX CLL (CHAROFF). Thereby, it can switch to the PQ curve shown with the continuous line of (a) of FIG.
  • the conversion unit 12 by switching to the optimal PQ curve in accordance with a video signal, the receiving device 10B displays an image of the appropriate quality for the intermediate gradation value or the like, including X 1 be able to.
  • the value of MAX CLL (CHAROFF) in FIG. 11A can be, for example, 800 nit (cd / m 2 ).
  • a curve shown in FIG. 11B is a conversion function (PQ curve indicated by EOFT according to SAMPTE-ST2084) when the conversion unit 12B refers to MAX CLL.
  • the conversion unit 12B refers to the MAX CLL.
  • the receiving device 10B can display an image with optimum image quality.
  • MAX CLL in (b) of FIG. 11 indicates the same value as the value of MAX CLL (CHAROFF), which is the maximum luminance value of content excluding subtitles, and is, for example, a value of 800 nit (cd / m 2 ). obtain.
  • the conversion unit 12B of the receiving apparatus 10 performs tone mapping by referring to MAX CLL or referring to information on MAX CLL (CHAROFF).
  • the receiving device 20B performs tone mapping by referring to information on MAX CLL or MAX CLL and MAX CLL (CHAROFF) by the converting unit 22B instead of the converting unit 12B. Also good.
  • Embodiment 5 will be described with reference to FIGS.
  • members having the same functions as those described in the fourth embodiment are denoted by the same reference numerals and description thereof is omitted.
  • FIG. 12 is a block diagram showing a main configuration of the video signal transmission system 200B according to the present embodiment. As shown in FIG. 5, the video signal transmission system 200B according to the present embodiment includes a transmission device 1B and a reception device 20B.
  • the receiving device 20B includes a conversion unit 22B instead of the conversion unit 12B. Except for this point, the receiving device 20B has the same configuration as the receiving device 10B.
  • the conversion unit 22B of the reception device 20B refers to two pieces of information about the maximum luminance acquired by the acquisition unit 11B and performs luminance conversion of the video indicated by the video data. That is, the conversion unit 12B in the fourth embodiment refers to information about one maximum luminance, whereas the conversion unit 22B in the present embodiment refers to information about another maximum luminance.
  • the conversion unit 22B refers to both MAX CLL and MAX CLL (CHAROFF) when the subtitle information is included in the video data in the video signal. Further, when the subtitle information is not included in the video data in the video signal, the conversion unit 22B refers to the MAX CLL as in the fourth embodiment.
  • FIG. 13 is a graph showing conversion (tone mapping) between a gradation value and a luminance value by a conversion function.
  • a solid PQ curve shown in FIG. 13A is a conversion function generated by the conversion unit 22B with reference to MAX CLL and MAX CLL (CHAROFF) when caption information is included in the video data. .
  • the conversion unit 22B creates a conversion function with reference to information on MAX CLL (CHAROFF) for luminance values up to MAX CLL (CHAROFF). For luminance values exceeding MAX CLL (CHAROFF), a conversion function is created by further referring to MAX CLL.
  • CHAROFF luminance value of the PQ curve gradually increases to the MAX CLL as the gradation value increases with the luminance value of MAX CLL (CHAROFF) as the boundary.
  • the solid line PQ curve (a) in FIG. 13 in the same tone value X 1, the broken lines refer only MAX CLL corresponding to the maximum luminance level of the contents, including the subtitle, etc.
  • PQ curve The luminance value Y 2 is higher than the luminance value Y 1 .
  • the dashed PQ curve is the same PQ curve as the PQ curve in FIG.
  • the conversion unit 22B refers to the MAX CLL for a luminance value exceeding MAX CLL (CHAROFF).
  • the conversion unit 12B refers only to information related to MAX CLL (CHAROFF).
  • the PQ curve created by the conversion unit 12B does not display a luminance value corresponding to a gradation value higher than MAX CLL (CHAROFF) _TONE.
  • MAX CLL MAX CLL
  • the conversion unit 22B refers to information on both MAX CLL and MAX CLL (CHAROFF). For this reason, as shown in FIG. 13A, a gradation value higher than MAX CLL (CHAROFF) _TONE and a luminance value that increases accordingly are also expressed as a PQ curve. As a result, the receiving device 20B including the conversion unit 22B can display a video with a high luminance value appropriately corresponding to a gradation value higher than MAX CLL (CHAROFF) _TONE.
  • the receiving device 20B it is possible to display a video with a luminance more appropriately according to a video signal including video data including subtitles and the like.
  • FIG. 13B shows a conversion function (PQ curve indicated by EOFT according to SAMPTE-ST2084) when the conversion unit 22B refers to MAX CLL.
  • the PQ curve in FIG. 13B is the same as the PQ curve in FIG.
  • FIG. 14 is a flowchart showing the flow of the receiving method.
  • Step S203B conversion process: When the process proceeds to YES in step S202B and proceeds to step S203B, in step S203B, the conversion unit 22B refers to information on MAX CLL and MAX CLL (CHAROFF). Then, the conversion unit 22B performs conversion (tone mapping) between the gradation value and the luminance value indicated by the video signal.
  • the conversion unit 12B performs conversion between a gradation value and a luminance value by using a conversion function according to the format of the video signal (for example, a PQ curve indicated by EOTF according to SAMPTE-ST 2084). Thereafter, the conversion unit 22B supplies the converted luminance value to the control unit 13B.
  • a conversion function according to the format of the video signal (for example, a PQ curve indicated by EOTF according to SAMPTE-ST 2084).
  • the conversion unit 22B of the reception device 20B performs the luminance conversion of the video indicated by the video data with reference to two of the plurality of pieces of information regarding the maximum luminance.
  • the conversion unit 22B can refer to two or more pieces of information among a plurality of pieces of information regarding the maximum luminance.
  • the conversion unit 22B can further refer to information on the maximum value of the luminance level corresponding to the gradation value taken by each pixel constituting each frame or each scene.
  • the conversion units 12B and 22B automatically select and refer to at least one piece of information about the maximum luminance separately when there is subtitle information and when there is no subtitle information. is doing.
  • a conversion unit 32B that selects which of a plurality of pieces of information regarding the maximum luminance is to be referred to is provided according to an instruction from the user. Also good.
  • Embodiment 6 will be described with reference to FIGS.
  • members having the same functions as those described in the fourth and fifth embodiments are denoted by the same reference numerals and description thereof is omitted.
  • FIG. 15 is a block diagram showing a main configuration of a video signal transmission system 300B according to the present embodiment. As shown in FIG. 15, the video signal transmission system 300B according to the present embodiment includes a transmission device 1B and a reception device 30B.
  • the receiving device 30B according to the present embodiment includes a converting unit 32B instead of the converting unit 12B of the receiving device 10B. Except for this point, the video signal transmission system 300B according to the present embodiment has the same configuration as the video signal transmission system 100B according to the fourth embodiment.
  • the conversion unit 32B of the reception device 30B includes a selection unit 33B.
  • the selection unit 33B selects which of a plurality of pieces of information regarding the maximum luminance is to be referred to according to an instruction from the user.
  • the selection unit 33B of the conversion unit 32B selects which one of MAX CLL, MAX CLL (CHAROFF), or a combination thereof is to be referred to according to an instruction from the user.
  • FIG. 16 is a graph showing conversion (tone mapping) between a gradation value and a luminance value by a conversion function.
  • the solid PQ curve shown in FIG. 16A is a conversion function when the selection unit 33B refers to MAX CLL and MAX CLL (CHAROFF).
  • the PQ curve shown in (a) of FIG. 16 is the same as the solid PQ curve shown in (a) of FIG.
  • a solid PQ curve shown in (b) of FIG. 16 is a conversion function when the selection unit 33B refers to MAX CLL (CHAROFF).
  • the PQ curve shown in (b) of FIG. 16 is the same as the solid PQ curve shown in (a) of FIG.
  • a solid PQ curve shown in FIG. 16C is a conversion function when the selection unit 33B refers to MAX CLL.
  • the PQ curve shown in (c) of FIG. 16 is the same as the PQ curve shown in (b) of FIG. 11 and (b) of FIG.
  • the user can cause the selection unit 33B to select which of MAX CLL, MAX CLL (CHAROFF), and a combination thereof is to be referred to.
  • the criteria for this selection are not particularly limited.
  • the user can arbitrarily cause the selection unit 33B to select which of MAX CLL, MAX CLL (CHAROFF), and a combination thereof is referred to.
  • an example of how the selection unit 33B is selected when the user is selected is shown.
  • the user instructs the selection unit 33B to select MAX CLL.
  • caption data is included in the video data in the video signal.
  • the user instructs the selection unit 33B to select whether to refer to only MAX CLL (CHAROFF) or to refer to both MAX CLL and MAX CLL (CHAROFF).
  • the user when the user thinks that it is sufficient that the intermediate gradation value can be converted into an appropriate luminance value and displayed on the video, the user should refer only to MAX CLL (CHAROFF) to the selection unit 33B. May be selected.
  • the selection unit 33B displays MAX CLL and MAX CLL (CHAROFF). You may choose to refer to both.
  • the user can cause the selection unit 33B to select which of a plurality of pieces of information regarding the maximum luminance is to be referred to.
  • the receiving device 30B can display a video with a luminance in accordance with a video signal including video data including subtitles and the like and according to the user's intention.
  • FIG. 17 is a flowchart showing the flow of the reception method.
  • steps S301B, S302B, S305B, S306B, and S307B in FIG. 17 are the same as steps S101B to S105B shown in FIG. 10, description thereof is omitted here.
  • step S304B in FIG. 17 is the same as step S203B in FIG. 14, and thus the description thereof is omitted here.
  • Step S303B The user causes the selection unit 33B to select whether to refer to information related to both MAX CLL and MAX CLL (CHAROFF) or only information related to MAX CLL (CHAROFF).
  • step S303B When the selection unit 33B selects to refer to information on both MAX CLL and MAX CLL (CHAROFF) (YES in step S303B), the process proceeds to step S304B.
  • step S305B When the selection unit 33B selects to refer to information related to only MAX CLL (CHAROFF) (NO in step S303B), the process proceeds to step S305B.
  • the selection unit 33B selects whether to refer to information related to both MAX CLL and MAX CLL (CHAROFF) or only to information related to MAX CLL (CHAROFF).
  • the selection unit 33B is not limited to this, and the selection unit 33B may select another option for a plurality of pieces of information related to maximum luminance in addition to MAX CLL and MAX CLL (CHAR OFF). Good.
  • the maximum value of the luminance level corresponding to the gradation value taken by each pixel constituting each frame or each scene in the video signal can be mentioned.
  • the user can display a video with a luminance more appropriately corresponding to the video signal including the video data on the receiving device 30B.
  • the selection unit 33B selects which of a plurality of pieces of information related to maximum luminance is to be referred to according to an instruction from the user.
  • the present embodiment is not limited to this. Instead of selecting according to the user's instruction, the selection unit 33B may select which of a plurality of pieces of information regarding the maximum luminance is to be referred to according to the content genre.
  • the selection unit 33B includes identification means (not shown) for identifying what the content genre is.
  • the selection unit 33B has identified that the genre of the content is a predetermined genre (for example, a Japanese movie or a sports program). In this case, the selection unit 33B determines that caption information is not included in the video data, and selects to refer to information on the MAX CLL.
  • a predetermined genre for example, a Japanese movie or a sports program.
  • the selection unit 33B determines that the genre of the content is a genre other than the predetermined genre (for example, a Western movie). In this case, the selection unit 33B determines that the subtitle information is included in the video data, and MAX CLL (CHAROFF) or MAX CLL and MAX. Select to refer to information on CLL (CHAROFF).
  • the selection unit 33B selects to refer to any one of a plurality of pieces of information regarding the maximum luminance according to the content genre.
  • the receiving device 30B can display a video with a luminance appropriate for each genre of content with respect to a video signal including video data.
  • the selection unit 33B selects which of a plurality of pieces of information related to the maximum luminance is referred to by connecting the content genre and the presence / absence of captions. That is, the selection unit 33B estimates whether there is subtitle information in the video data in the video signal from the genre of the content, and selects which of a plurality of pieces of information regarding the maximum luminance is to be referred to based on this.
  • the present embodiment is not limited to this.
  • control blocks (particularly the conversion units 12B, 22B, and 32B) of the receiving devices 10B, 20B, and 30B may be realized by a logic circuit (hardware) formed in an integrated circuit (IC chip) or the like, or a CPU (Central It may be realized by software using a Processing Unit.
  • the receiving devices 10B, 20B, and 30B include a CPU that executes instructions of a program that is software that realizes each function, and a ROM (Read that records the above-described program and various data so that the computer (or CPU) can read them Only Memory) or a storage device (these are referred to as “recording media”), RAM (Random Access Memory) for expanding the program, and the like.
  • a computer or CPU reads the said program from the said recording medium and runs it.
  • a “non-temporary tangible medium” such as a tape, a disk, a card, a semiconductor memory, a programmable logic circuit, or the like can be used.
  • the program may be supplied to the computer via an arbitrary transmission medium (such as a communication network or a broadcast wave) that can transmit the program.
  • an arbitrary transmission medium such as a communication network or a broadcast wave
  • one embodiment of the present invention can also be realized in the form of a data signal embedded in a carrier wave, in which the program is embodied by electronic transmission.
  • the display devices (1, 10) according to the first aspect of the present invention have a plurality of conversion means for setting a luminance value from the gradation value indicated by the video signal of the display target image, according to the luminance level of the video signal.
  • a switching unit (4) for switching the conversion means, and the switching unit refers to the luminance level of a corrected image obtained by excluding a region including an artificial display object from the display target image. Switch means.
  • the luminance value is set from the gradation value by the conversion unit according to the luminance level of the corrected image excluding an artificial display object that may greatly change the maximum luminance level or the average luminance level. can do.
  • the tone mapping method is switched with reference to the maximum luminance level or the average luminance level, the influence of the luminance of the artificial display object on the maximum luminance level or the average luminance level can be suppressed. Therefore, it is possible to display an image with a more appropriate luminance according to the image signal.
  • a display device (1, 10) according to aspect 2 of the present invention is the above-described aspect 1, wherein the display device (1, 10) is composed of a plurality of areas, and the backlight (7) capable of individually controlling the brightness of the areas, and the backlight A backlight control unit (6) for controlling the light, wherein the backlight control unit makes the brightness of the area corresponding to the area including the artificial display object different from the brightness of the other areas. May be.
  • the brightness of the backlight corresponding to each region so that there is no unnatural boundary between the region including the artificial display object and the region other than the region including the artificial display object. Can be adjusted.
  • the backlight control unit determines the brightness of the area corresponding to the area including the artificial display object. Depending on the gradation of the display object, the brightness of other areas may be different.
  • each region is set so that there is no unnatural boundary between the region including the artificial display object and the region other than the region including the artificial display object.
  • the backlight brightness corresponding to can be adjusted more appropriately.
  • the artificial display object may be an object synthesized or added to the content video of the display target image.
  • the tone mapping method when the tone mapping method is switched with reference to the maximum luminance level or the average luminance level, the maximum luminance level based on the luminance of the object synthesized or added to the content video. Alternatively, the influence on the average luminance level can be suppressed.
  • the object may be a caption, a logo, or a control panel.
  • the tone mapping method when the tone mapping method is switched with reference to the maximum luminance level or the average luminance level, the influence on the maximum luminance level or the average luminance level due to the luminance of the caption, logo, or control panel is suppressed. be able to.
  • the conversion means is a conversion function between a gradation value and a luminance value by a conversion function
  • the switching unit The conversion function may be switched to a conversion function that converts the graph of the gradation value before conversion and the luminance value after conversion into a PQ curve corresponding to the maximum luminance level of the corrected image.
  • an image can be displayed with a more appropriate luminance corresponding to the HDR signal.
  • the display device (10) according to aspect 7 of the present invention provides a display device (10) according to any one of aspects 1 to 6, wherein the switching unit performs a function of switching the conversion unit with reference to a luminance level of the corrected image. You may further provide the reception part which receives selection.
  • the user can select whether to switch the conversion means with reference to the luminance level of the corrected image.
  • the switching unit refers to the luminance level of the corrected image according to the category, genre, or scene of the display target image. Then, the conversion means may be switched.
  • the conversion unit when there is a high possibility that the category, genre, or scene of the display target image includes an artificial display object, the conversion unit is switched by referring to the luminance level of the corrected image.
  • the switching of the conversion means can be executed as necessary.
  • the television receiver (100) according to the ninth aspect of the present invention includes any one of the display devices according to the first to eighth aspects.
  • the television receiver can obtain the effects that the display device exhibits in each of the above aspects.
  • a video processing method is a video processing method by a display device (1, 10) having a plurality of conversion means for setting a luminance value from a gradation value indicated by a video signal of a display target image, A switching step of switching the conversion means according to the luminance level of the video signal, wherein the switching step includes a luminance level of a corrected image obtained by excluding a region including an artificial display object from the display target image.
  • the conversion means is switched with reference to FIG.
  • the video processing apparatus may be realized by a computer.
  • the video processing apparatus is operated on each computer by causing the computer to operate as each unit (software element) included in the video processing apparatus.
  • Also included in the scope of the present invention are a control program for the video processing apparatus to be realized and a computer-readable recording medium on which the control program is recorded.
  • a display device (1, 10) includes a backlight (7) that includes a plurality of areas and can individually control the brightness of the plurality of areas, and a backlight that controls the backlight.
  • a light control unit (6), and the backlight control unit makes the brightness of the corresponding area corresponding to the region including the artificial display object in the display target image different from the brightness of the other areas.
  • an image can be displayed with a more appropriate luminance according to the image signal. More specifically, even when the display target image includes an artificial display object, an image can be displayed with appropriate luminance.
  • the backlight control unit determines the brightness of an area corresponding to the area including the artificial display object. Depending on the gradation of the display object, the brightness of other areas may be different.
  • the brightness of the backlight corresponding to each region can be adjusted more appropriately according to the gradation of the artificial display object.
  • the artificial display object may be an object synthesized or added to the content video of the display target image.
  • the object may be a caption, a logo, or a control panel.
  • the brightness of the backlight can be appropriately adjusted when a display target image including a subtitle, a logo, or a control panel is displayed.
  • the backlight control unit performs a function of making the brightness of the corresponding area different from the brightness of the other areas.
  • An accepting unit (12) for accepting selection by the user may be further provided.
  • the user can select whether to make the brightness of the corresponding area different from the brightness of other areas.
  • the backlight control unit is configured such that the brightness of the corresponding area depends on a category, a genre, or a scene of the display target image. May be different from the brightness of other areas.
  • the brightness of the corresponding area is made different from the brightness of the other areas.
  • the local dimming can be preferably performed.
  • the television receiver (100) according to aspect 17 of the present invention may include any one of the display devices according to aspects 11 to 16.
  • the television receiver can obtain the effects that the display device exhibits in each of the above aspects.
  • the backlight control method according to aspect 18 of the present invention is based on a display device (1, 10) that includes a plurality of areas and includes a backlight (7) that can individually control the brightness of the plurality of areas.
  • the backlight control method includes a backlight control step of making the brightness of the corresponding area corresponding to the area including the artificial display object in the display target image different from the brightness of the other areas.
  • the video processing apparatus may be realized by a computer.
  • the video processing apparatus is operated on each computer by causing the computer to operate as each unit (software element) included in the video processing apparatus.
  • Also included in the scope of the present invention are a control program for the video processing apparatus to be realized and a computer-readable recording medium on which the control program is recorded.
  • the receiving device (10B, 20B, 30B) is a receiving device (10B, 20B, 30B) that receives a video signal including video data and metadata, and the content indicated by the video data.
  • the acquisition unit (11B) that acquires a plurality of pieces of information related to the maximum brightness of one content, and at least one of the plurality of pieces of information related to the maximum brightness acquired by the acquisition unit (11B),
  • a conversion unit (12B, 22B, 32B) that performs luminance conversion of the video indicated by the video data.
  • the conversion unit (12B, 22B, 32B) can refer to one or more pieces of information related to the maximum luminance of the appropriate content according to the video data. Therefore, the receiving devices (10B, 20B, 30B) can display a video with appropriate luminance according to the video signal including the video data.
  • the conversion unit (22B, 32B) includes at least one of a plurality of pieces of information regarding the maximum luminance acquired by the acquisition unit (11B).
  • the luminance conversion of the video indicated by the video data may be performed with reference to the two pieces of information.
  • the conversion unit (22B, 32B) can refer to two or more pieces of information related to the maximum luminance of the appropriate content according to the video data. Therefore, the receiving device (20B, 30B) can display a video with a more appropriate luminance according to the video signal including the video data.
  • the selection unit (33B) that selects which of the plurality of pieces of information related to the maximum luminance the conversion unit (32B) refers to. ), And the selection unit (33B) may select which of a plurality of pieces of information regarding the maximum luminance is to be referred to in accordance with an instruction from the user.
  • the user can cause the selection unit (33B) to select which of a plurality of pieces of information regarding the maximum luminance is to be referred to.
  • the receiving device (30B) can display a video with brightness according to the video signal including video data including captions and the like according to the user's intention.
  • the selection unit (33B) that selects which of the plurality of pieces of information related to the maximum luminance the conversion unit (32B) refers to.
  • the selection unit (33B) may select which of a plurality of pieces of information regarding the maximum luminance is to be referred to according to the genre of the content.
  • the selection unit (33B) selects to refer to any one of a plurality of pieces of information regarding the maximum luminance according to the content genre.
  • the receiving device (30B) can display a video with a luminance appropriate for each genre of content with respect to a video signal including video data.
  • a television receiver according to aspect 23 of the present invention includes the receiving device (10B, 20B, 30B) described in aspects 19-22.
  • plays in each said aspect can be acquired in the said television receiver.
  • the video signal generation device (2B) is a video signal generation device (2B) that generates a video signal including video data and metadata, and relates to the maximum luminance of the content indicated by the video data.
  • a metadata generation unit (4B) that generates metadata including a plurality of pieces of information for one content is provided.
  • the metadata generation unit (4B) can generate metadata including a plurality of pieces of information related to the maximum luminance of the content according to the video data.
  • the receiving devices (10B, 20B, 30B) that have received the metadata generated by the metadata generation unit (4B) can display the video with a more appropriate luminance according to the video signal including the video data. .
  • the transmission device (1B) according to aspect 25 of the present invention includes the video signal generation device (2B) according to aspect 24 above.
  • the video signal transmission system (100B, 200B, 300B) is a video signal transmission system (100B, 200B, 300B) including a transmission device (1) and a reception device (10B, 20B, 30B).
  • the transmission device (1B) transmits video signals including video data and metadata, and includes a plurality of pieces of information regarding the maximum luminance of the content indicated by the video data for one content.
  • the metadata generation unit (4B) for generating the video signal is received, and the reception devices (10B, 20B, 30B) receive the video signal.
  • one information comprises converting unit for performing luminance conversion image indicated by a picture data (12B, 22B, 32B) and a.
  • a receiving method is a receiving method for receiving a video signal including video data and metadata, and a plurality of pieces of information regarding the maximum luminance of the content indicated by the video data for a single content.
  • the receiving device (10B, 20B, 30B) may be realized by a computer.
  • a program of a receiving device that realizes the receiving device (10B, 20B, 30B) by a computer by operating as a computer and a computer-readable recording medium on which the program is recorded also fall within the scope of the present invention.

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Theoretical Computer Science (AREA)
  • Computer Hardware Design (AREA)
  • Signal Processing (AREA)
  • Multimedia (AREA)
  • Chemical & Material Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Nonlinear Science (AREA)
  • Mathematical Physics (AREA)
  • Optics & Photonics (AREA)
  • Control Of Indicators Other Than Cathode Ray Tubes (AREA)

Abstract

L'invention concerne un dispositif d'affichage (1) comprenant une unité de commutation (4) qui commute un moyen de conversion en fonction du niveau de luminosité d'un signal vidéo. L'unité de commutation commute le moyen de conversion en se référant au niveau de luminosité d'une image corrigée obtenue par l'exclusion d'une zone comprenant un objet d'affichage artificiel d'une image à afficher.
PCT/JP2018/003667 2017-02-09 2018-02-02 Dispositif d'affichage, récepteur de télévision, procédé de traitement vidéo, procédé de commande de rétroéclairage, dispositif de réception, dispositif de génération de signal vidéo, dispositif de transmission, système de transmission de signal vidéo, procédé de réception, programme, programme de commande et support d'enregistrement Ceased WO2018147196A1 (fr)

Applications Claiming Priority (6)

Application Number Priority Date Filing Date Title
JP2017-022038 2017-02-09
JP2017022039A JP2018128594A (ja) 2017-02-09 2017-02-09 表示装置、テレビジョン受像機、バックライト制御方法、制御プログラム、及び記録媒体
JP2017022034A JP6466488B2 (ja) 2017-02-09 2017-02-09 表示装置、テレビジョン受像機、映像処理方法、制御プログラム、及び記録媒体
JP2017022038A JP6381701B2 (ja) 2017-02-09 2017-02-09 受信装置、テレビジョン受像機、映像信号生成装置、送信装置、映像信号伝送システム、受信方法、プログラム、及び記録媒体
JP2017-022034 2017-02-09
JP2017-022039 2017-02-09

Publications (1)

Publication Number Publication Date
WO2018147196A1 true WO2018147196A1 (fr) 2018-08-16

Family

ID=63107436

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2018/003667 Ceased WO2018147196A1 (fr) 2017-02-09 2018-02-02 Dispositif d'affichage, récepteur de télévision, procédé de traitement vidéo, procédé de commande de rétroéclairage, dispositif de réception, dispositif de génération de signal vidéo, dispositif de transmission, système de transmission de signal vidéo, procédé de réception, programme, programme de commande et support d'enregistrement

Country Status (1)

Country Link
WO (1) WO2018147196A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPWO2023095718A1 (fr) * 2021-11-29 2023-06-01

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2001027890A (ja) * 1999-05-10 2001-01-30 Matsushita Electric Ind Co Ltd 画像表示装置および画像表示方法
JP2007140483A (ja) * 2005-10-18 2007-06-07 Sharp Corp 液晶表示装置
JP2013130744A (ja) * 2011-12-22 2013-07-04 Sharp Corp 映像表示装置
JP2014532195A (ja) * 2011-09-27 2014-12-04 コーニンクレッカ フィリップス エヌ ヴェ 画像のダイナミックレンジ変換のための装置及び方法
WO2015198554A1 (fr) * 2014-06-23 2015-12-30 パナソニックＩｐマネジメント株式会社 Procédé de conversion et appareil de conversion
WO2016074999A1 (fr) * 2014-11-10 2016-05-19 Koninklijke Philips N.V. Procédé de codage, processeur vidéo, procédé de décodage, décodeur vidéo
JP2016515327A (ja) * 2013-02-21 2016-05-26 ドルビー ラボラトリーズ ライセンシング コーポレイション オーバーレイグラフィクス合成のためのアピアランスマッピングのシステムおよび装置
WO2016125691A1 (fr) * 2015-02-03 2016-08-11 ソニー株式会社 Dispositif d'émission, procédé d'émission, dispositif de réception et procédé de réception
WO2017110823A1 (fr) * 2015-12-25 2017-06-29 シャープ株式会社 Dispositif d'affichage, procédé de commande de dispositif d'affichage, programme de commande, et support d'enregistrement

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2001027890A (ja) * 1999-05-10 2001-01-30 Matsushita Electric Ind Co Ltd 画像表示装置および画像表示方法
JP2007140483A (ja) * 2005-10-18 2007-06-07 Sharp Corp 液晶表示装置
JP2014532195A (ja) * 2011-09-27 2014-12-04 コーニンクレッカ フィリップス エヌ ヴェ 画像のダイナミックレンジ変換のための装置及び方法
JP2013130744A (ja) * 2011-12-22 2013-07-04 Sharp Corp 映像表示装置
JP2016515327A (ja) * 2013-02-21 2016-05-26 ドルビー ラボラトリーズ ライセンシング コーポレイション オーバーレイグラフィクス合成のためのアピアランスマッピングのシステムおよび装置
WO2015198554A1 (fr) * 2014-06-23 2015-12-30 パナソニックＩｐマネジメント株式会社 Procédé de conversion et appareil de conversion
WO2016074999A1 (fr) * 2014-11-10 2016-05-19 Koninklijke Philips N.V. Procédé de codage, processeur vidéo, procédé de décodage, décodeur vidéo
WO2016125691A1 (fr) * 2015-02-03 2016-08-11 ソニー株式会社 Dispositif d'émission, procédé d'émission, dispositif de réception et procédé de réception
WO2017110823A1 (fr) * 2015-12-25 2017-06-29 シャープ株式会社 Dispositif d'affichage, procédé de commande de dispositif d'affichage, programme de commande, et support d'enregistrement

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPWO2023095718A1 (fr) * 2021-11-29 2023-06-01
WO2023095718A1 (fr) * 2021-11-29 2023-06-01 パナソニックＩｐマネジメント株式会社 Procédé de traitement vidéo, dispositif de traitement vidéo et programme
JP7641516B2 (ja) 2021-11-29 2025-03-07 パナソニックＩｐマネジメント株式会社 映像処理方法、映像処理装置、及び、プログラム

Similar Documents

Publication Publication Date Title
JP6559803B2 (ja) 表示装置、表示装置の制御方法、制御プログラム、および記録媒体
US20220159264A1 (en) Data output apparatus, data output method, and data generation method
KR102863939B1 (ko) 디스플레이 장치 및 그 제어 방법
US11032448B2 (en) Video display system and video display method
JP6161222B1 (ja) 受信装置および放送システム
WO2019069482A1 (fr) Système d'affichage d'image et procédé d'affichage d'image
JP5336019B1 (ja) 表示装置、表示装置の制御方法、テレビジョン受像機、制御プログラム、および記録媒体
JP2017169052A (ja) 表示装置、テレビジョン受像機、表示方法、制御プログラム、および記録媒体
KR102413839B1 (ko) 컨텐츠 제공장치, 그 제어방법 및 기록매체
JP6466488B2 (ja) 表示装置、テレビジョン受像機、映像処理方法、制御プログラム、及び記録媒体
JP2018129700A (ja) 信号処理システム、信号生成装置、出力装置、信号生成方法、出力方法、信号生成プログラム、及び出力プログラム
WO2018147196A1 (fr) Dispositif d'affichage, récepteur de télévision, procédé de traitement vidéo, procédé de commande de rétroéclairage, dispositif de réception, dispositif de génération de signal vidéo, dispositif de transmission, système de transmission de signal vidéo, procédé de réception, programme, programme de commande et support d'enregistrement
JP2004194311A (ja) 映像再生装置及び映像再生方法
JP2014066928A (ja) 映像信号供給装置、表示装置、テレビジョン受像機、表示システム、映像信号供給方法、表示方法、プログラム、及び、記録媒体
JP2018128594A (ja) 表示装置、テレビジョン受像機、バックライト制御方法、制御プログラム、及び記録媒体
JP6381701B2 (ja) 受信装置、テレビジョン受像機、映像信号生成装置、送信装置、映像信号伝送システム、受信方法、プログラム、及び記録媒体
JP6465944B2 (ja) 表示装置、テレビジョン受像機、表示方法、制御プログラム、および記録媒体
JP6479732B2 (ja) 映像処理装置、テレビジョン受像機、映像処理方法、制御プログラム、および記録媒体
JP2019041329A (ja) 映像処理装置、表示装置、映像処理方法、制御プログラム、および記録媒体
JP2018117281A (ja) 文字スーパー合成装置及びそのプログラム
JP2018019431A (ja) 表示装置、テレビジョン受像機、表示方法、制御プログラム、および記録媒体
JP2017169236A (ja) 受信装置および放送システム

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 18751331

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 18751331

Country of ref document: EP

Kind code of ref document: A1