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WO2016029502A1 - Signal source switching method and device - Google Patents

Signal source switching method and device Download PDF

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Publication number
WO2016029502A1
WO2016029502A1 PCT/CN2014/085882 CN2014085882W WO2016029502A1 WO 2016029502 A1 WO2016029502 A1 WO 2016029502A1 CN 2014085882 W CN2014085882 W CN 2014085882W WO 2016029502 A1 WO2016029502 A1 WO 2016029502A1
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WO
WIPO (PCT)
Prior art keywords
signal
video signal
memory
cached
source channel
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/CN2014/085882
Other languages
French (fr)
Chinese (zh)
Inventor
赵新科
王海滨
虞顺
刘翔章
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.)
Shenzhen Skyworth RGB Electronics Co Ltd
Original Assignee
Shenzhen Skyworth RGB Electronics Co Ltd
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
Application filed by Shenzhen Skyworth RGB Electronics Co Ltd filed Critical Shenzhen Skyworth RGB Electronics Co Ltd
Publication of WO2016029502A1 publication Critical patent/WO2016029502A1/en
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • 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
    • H04N21/433—Content storage operation, e.g. storage operation in response to a pause request, caching operations
    • 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
    • H04N21/442—Monitoring of processes or resources, e.g. detecting the failure of a recording device, monitoring the downstream bandwidth, the number of times a movie has been viewed, the storage space available from the internal hard disk
    • H04N21/44213—Monitoring of end-user related data
    • H04N21/44222—Analytics of user selections, e.g. selection of programs or purchase activity
    • 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
    • H04N21/433—Content storage operation, e.g. storage operation in response to a pause request, caching operations
    • H04N21/4331—Caching operations, e.g. of an advertisement for later insertion during playback
    • 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
    • H04N21/44—Processing of video elementary streams, e.g. splicing a video clip retrieved from local storage with an incoming video stream or rendering scenes according to encoded video stream scene graphs
    • H04N21/4402—Processing of video elementary streams, e.g. splicing a video clip retrieved from local storage with an incoming video stream or rendering scenes according to encoded video stream scene graphs involving reformatting operations of video signals for household redistribution, storage or real-time display
    • 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
    • H04N21/44—Processing of video elementary streams, e.g. splicing a video clip retrieved from local storage with an incoming video stream or rendering scenes according to encoded video stream scene graphs
    • H04N21/4402—Processing of video elementary streams, e.g. splicing a video clip retrieved from local storage with an incoming video stream or rendering scenes according to encoded video stream scene graphs involving reformatting operations of video signals for household redistribution, storage or real-time display
    • H04N21/440218—Processing of video elementary streams, e.g. splicing a video clip retrieved from local storage with an incoming video stream or rendering scenes according to encoded video stream scene graphs involving reformatting operations of video signals for household redistribution, storage or real-time display by transcoding between formats or standards, e.g. from MPEG-2 to MPEG-4
    • 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
    • H04N21/442—Monitoring of processes or resources, e.g. detecting the failure of a recording device, monitoring the downstream bandwidth, the number of times a movie has been viewed, the storage space available from the internal hard disk

Definitions

  • the present invention relates to the field of display devices, and in particular, to a method and an apparatus for switching a signal source.
  • the television as a living room entertainment terminal not only undertakes the use of the entertainment function of the television itself, but also has a plurality of peripheral signal ports, so the television is also a display terminal as various peripherals.
  • the television is also a display terminal as various peripherals.
  • peripheral products and more and more functions it is also frequent for users to switch signal sources to play different video content.
  • every time the TV set switches the signal source it needs to exit the playback process of the signal source before switching, and then call the initialization data of the switched signal source, and then display the video data of the switched signal source, thus causing The switching process of the signal source is slow and the signal display is slow, which forms a visual pause in switching the signal source, resulting in poor visual effects.
  • the main object of the present invention is to solve the technical problem that the multimedia playback device has poor visual effects due to slow process of switching signal sources and slow signal display.
  • the present invention provides a method for switching a signal source, and the method for switching the signal source includes the following steps:
  • the video signal corresponding to the switched source channel is read from the memory, and the video signal is displayed.
  • the method for switching the signal source further includes:
  • the step of acquiring the video signal in the signal source channel with the signal input comprises:
  • the step of buffering the video signal encoded in the signal source channel with the signal input into the memory includes:
  • the encoded video signal is the same as the video signal pre-cached in the memory, deleting the encoded video signal, and maintaining the video signal pre-cached in the memory;
  • the detecting instruction is an instruction generated by the multimedia playing device at a timing or an instruction generated when the multimedia playing device is powered on or an instruction generated when a signal source button is triggered.
  • the present invention further provides a switching device for a signal source, where the switching device of the signal source includes:
  • the detecting module is configured to detect whether each signal source channel of the multimedia playing device has a signal input when detecting the detecting instruction;
  • An acquisition module configured to acquire a video signal in a signal source channel with a signal input
  • a buffer module configured to buffer a video signal in the source channel of the acquired signal input into the memory
  • a reading module configured to: when the signal source switching instruction is detected, read a video signal corresponding to the switched source channel from the memory, and display the video signal.
  • the switching device of the signal source further includes:
  • An identification module for identifying a source channel having a signal input.
  • the acquiring module is further configured to acquire a video signal within a preset duration in a signal source channel having a signal input.
  • the cache module comprises:
  • a coding unit configured to encode a video signal in a signal source channel obtained with a signal input
  • a determining unit configured to determine whether the encoded video signal is the same as a video signal that is pre-cached in the memory
  • a holding unit configured to: after the encoded video signal is the same as the video signal pre-cached in the memory, delete the encoded video signal, and maintain the video signal pre-cached in the memory;
  • a replacing unit configured to replace the encoded video signal with the video signal pre-cached in the memory, after the encoded video signal is different from the video signal pre-cached in the memory.
  • the detecting instruction or the instruction generated by the multimedia playing device timing or the instruction generated when the multimedia playing device is powered on or the command generated by the signal source button is triggered.
  • the method and device for switching a signal source of the present invention by detecting the signal input state (ie, with/without signal input) of each signal source channel of the multimedia playback device, and detecting all the signal source channels that have signal input
  • the video signal is pre-cached into the memory.
  • the pre-cached video signal is directly read from the switched source channel for display, eliminating the video of the switched source channel.
  • the signal is buffered to the memory for processing, so that the switched image signal can be displayed more quickly when the signal source channel is switched, the visual pause when the signal source channel is switched is greatly reduced, and the visual effect of the multimedia playback device is improved.
  • FIG. 1 is a flowchart of a first embodiment of a method for switching a signal source according to the present invention
  • FIG. 2 is a flowchart of a second embodiment of a method for switching a signal source according to the present invention
  • step S30 in FIG. 1 is a flow chart of the refinement of step S30 in FIG. 1;
  • FIG. 4 is a schematic diagram of functional modules of a first embodiment of a signal source switching apparatus according to the present invention.
  • FIG. 5 is a schematic diagram of functional modules of a second embodiment of a signal source switching apparatus according to the present invention.
  • FIG. 6 is a schematic diagram of a refinement function module of a cache module in a third embodiment of a signal source switching apparatus according to the present invention.
  • the present invention provides a method of switching a signal source, the method of switching the signal source running in a multimedia playback device (such as a television).
  • FIG. 1 is a flowchart of a first embodiment of a method for switching a signal source according to the present invention.
  • the method for switching the signal source includes:
  • Step S10 detecting, when detecting the detection instruction, detecting whether each signal source channel of the multimedia playback device has a signal input;
  • the multimedia playback device detects the detection command in real time, and the multimedia playback device detects whether each signal source channel of the multimedia playback device has a signal input when detecting the detection instruction, to confirm which signal source channels have signal input, and which signal source channels have no signal. Input.
  • the multimedia playback device does not detect the detection command, does not perform any operation or continues to detect the detection command.
  • detecting whether the signal source channel has a signal input can be determined by a status signal fed back by the signal source channel. For example, when the signal source channel has a signal input, the feedback status signal is at a first level (for example, a high level). When the signal source channel has no signal input, the feedback status signal is a second level (for example, a low level) opposite to the first level state.
  • the detection instruction may be an instruction generated by the multimedia playback device at a timing, that is, whether timing detection is performed on each signal source channel of the multimedia playback device; for example, a detection instruction is generated every 1 second. It is detected once in 1 second.
  • the detection command can also be an instruction generated when the multimedia playback device is powered on, that is, the multimedia playback device generates a detection command when the device is turned on, and detects whether there is a signal input for each signal source channel when the device is turned on. 3.
  • the detection command can also be a command generated when the signal source button (for example, the signal source channel selects the menu button) is triggered, that is, when the user presses the signal source button, a detection command is generated, and whether each signal source channel has a signal input is performed. Detection.
  • the generation of the detection instruction may include one or more of the above three modes, that is, the multimedia playback device generates the detection instruction periodically, generates the detection instruction when the power is turned on, and generates the detection instruction when the signal source button is triggered, and may exist at the same time.
  • Step S20 acquiring a video signal in a signal source channel with a signal input
  • the video signal in the signal source channel (the signal source channel with the signal input) is acquired for a period of time, and the video data in all the signal source channels with the signal input are respectively obtained.
  • the video signal in the source channel of the no-signal input signal may be not performed, or no operation may be performed, or whether the signal input of other signal source channels is continuously detected.
  • Step S30 buffering the video signal in the signal source channel with the signal input into the memory
  • the encoding process of the source channel is called, the acquired video signal is encoded into a video stream, and then the encoded video stream is buffered into the memory (for example, double Corresponding locations in the rate SDRAM) (different source channels correspond to different cache addresses) for the multimedia playback device to read the display.
  • the memory for example, double Corresponding locations in the rate SDRAM
  • Step S40 when the signal source switching instruction is detected, the video signal corresponding to the switched source channel is read from the memory, and the video signal is displayed.
  • the multimedia playback device detects the signal source switching instruction, and reads the video signal corresponding to the switched source channel from the memory: if the switched source channel is a signal source with signal input
  • the channel that is, the video stream buffered in the memory after the switching source channel is read for image preprocessing (image preprocessing including image reading, image decoding, audio and video synchronization processing and display format adjustment), and image preprocessing is completed.
  • image preprocessing image preprocessing including image reading, image decoding, audio and video synchronization processing and display format adjustment
  • image preprocessing image preprocessing including image reading, image decoding, audio and video synchronization processing and display format adjustment
  • the display data is sent to the CPU of the multimedia playing device, and is displayed through the CPU display channel; if the switched source channel is a signal source channel without signal input, the signal source channel without signal input is not buffered in the memory.
  • the video signal so the signal is not read, that is, no signal is displayed.
  • the method for switching the signal source proposed in this embodiment is to detect the signal input state (ie, with/without signal input) of each signal source channel of the multimedia playback device, and to detect all the signal source channels that have signal input.
  • the video signal is pre-cached into the memory.
  • the pre-cached video signal is directly read from the switched source channel for display, eliminating the video of the switched source channel.
  • the signal is buffered to the memory for processing, so that the switched image signal can be displayed more quickly when the signal source channel is switched, the visual pause when switching the signal source channel is greatly reduced, and the visual effect of the multimedia playing device is improved.
  • step S20 the step of acquiring the video signal in the signal source channel with the signal input comprises: acquiring the video signal within the preset duration in the signal source channel with the signal input.
  • the length of the acquired video signal can be preset, and can be set according to the remaining resource size of the CPU of the specific multimedia playback device. For example, when the multimedia playback device runs more processes and the CPU resources are less, the data can be obtained.
  • the duration of the video signal of the signal source channel with signal input is set smaller (for example, 3 seconds, 5 seconds), thereby reducing the CPU resource requirement of the multimedia playback device, reducing the burden on the CPU of the multimedia playback device, and making the multimedia playback device The use of the run is smoother.
  • the duration of the video signal in the signal source channel with the signal input can be set by itself, and the corresponding modification setting can be performed according to different operating burdens of the multimedia playing device, thereby ensuring multimedia. Smooth operation of the playback device.
  • FIG. 2 is a flowchart of a second embodiment of a method for switching a signal source according to the present invention.
  • the method for switching the signal source further includes:
  • step S50 the signal source channel with signal input is identified.
  • the signal source channel (the signal source channel with the signal input) is identified.
  • the manner of the identification may be various, for example, 1. the corresponding arrangement of the signal source channel on the interactive interface may be highlighted by a high brightness or displayed in a color background; 2. the corresponding source channel may be corresponding to the interaction interface. The words “with/with signal” are displayed on the option.
  • the signal source switching method can also display dark gray brightness of the corresponding signal source channel on the interactive interface when the signal source channel of the multimedia playback device has no signal input, or input no signal.
  • the signal source channel is shielded (not displayed) in the corresponding interface on the interactive interface; or, the signal source switching method can correspond to the signal source channel with signal input and the signal source channel with no signal input on the interaction interface.
  • the options are divided into two types of separate displays (for example, divided into "with signal” and "no signal”).
  • the user can clearly know which signal source channels have signal input, and avoid the user in each signal source channel when switching the signal source channel.
  • the blind switching operation (including the signal source channel with signal input and the signal source channel without signal input) allows the user to switch to the source channel that you want to watch more accurately and efficiently when switching the source channel.
  • FIG. 3 is a flow chart of the refinement of step S30 in FIG.
  • step S30 of the method for switching the signal source includes:
  • Step S301 encoding a video signal in a signal source channel obtained with a signal input
  • the encoding process of the source channel of the acquired video signal is called, and the acquired video signal is encoded into a video stream.
  • Step S302 determining whether the encoded video signal is the same as the video signal pre-cached in the memory
  • the video signal pre-cached in the memory corresponding to the signal source channel having the signal input in the memory can be compared with the video signal corresponding to the signal source channel in the memory. To determine whether the video signal in the signal source channel with the signal input is updated, that is, whether the encoded video signal is the same as the video signal pre-cached in the memory.
  • Step S303 if the encoded video signal is the same as the video signal pre-cached in the memory, the encoded video signal is deleted, and the video signal pre-cached in the memory is held;
  • the comparison result is the same, it means that the video signal in the signal source channel with signal input is not updated. In this case, the encoded video signal is not needed, the encoded video signal is deleted, and the video pre-cached in the memory is kept. The signal does not change.
  • Step S304 if the encoded video signal is different from the video signal pre-cached in the memory, the encoded video signal is replaced with a video signal pre-cached in the memory.
  • the comparison result is different, indicating that the video signal in the signal source channel with the signal input is updated, it is necessary to update the video signal pre-cached in the memory corresponding to the signal source channel having the signal input in the memory, so that the multimedia is
  • the latest video signal is read for display; at this time, the video signal pre-cached in the memory is useless, so the encoded video signal is replaced.
  • the video signal pre-cached in the memory is cleared, and the video signal pre-cached in the memory is cleared, and the encoded video signal is buffered to form the latest video signal pre-cached in the memory, and the next encoded video signal is updated with the latest one.
  • the video signals pre-cached in the memory are compared for comparison.
  • the method for switching the signal source of the embodiment by detecting whether the video signal in the signal source channel with the signal input is updated, when the update is performed, the newly acquired video signal is encoded, and the corresponding pre-cached in the memory is replaced in the memory.
  • the video signal avoids the use of memory by useless video signals; at the same time, when there is no update, the video signal corresponding to the pre-cached memory in the memory is directly kept unchanged, and the encoded video signal is deleted without being cached. , effectively reducing the occupation of the CPU resources of the multimedia playback device.
  • the present invention further provides a switching device for a signal source, the switching device of which operates in a multimedia playback device, such as a television.
  • FIG. 4 is a schematic diagram of functional modules of a first embodiment of a signal source switching apparatus according to the present invention.
  • the switching device of the signal source includes:
  • the detecting module 10 is configured to detect whether each signal source channel of the multimedia playing device has a signal input when detecting the detecting instruction;
  • the detecting module 10 detects the detecting instruction, and when detecting the detecting command, the detecting module 10 detects whether each signal source channel of the multimedia playing device has a signal input, to confirm which signal source channels have signal input, and which signal source channels have no signal input. .
  • the detection module 10 does not detect the detection instruction, does not perform any operation or continues to detect the detection instruction.
  • detecting whether the signal source channel has a signal input can be determined by a status signal fed back by the signal source channel. For example, when the signal source channel has a signal input, the feedback status signal is at a first level (for example, a high level). When the signal source channel has no signal input, the feedback status signal is a second level (for example, a low level) opposite to the first level state.
  • the detection instruction may be an instruction generated by the multimedia playback device at a timing, that is, whether timing detection is performed on each signal source channel of the multimedia playback device; for example, a detection instruction is generated every 1 second. It is detected once in 1 second.
  • the detection command can also be an instruction generated when the multimedia playback device is powered on, that is, the multimedia playback device generates a detection command when the device is turned on, and detects whether there is a signal input for each signal source channel when the device is turned on. 3.
  • the detection command can also be a command generated when the signal source button (for example, the signal source channel selects the menu button) is triggered, that is, when the user presses the signal source button, a detection command is generated, and whether each signal source channel has a signal input is performed. Detection.
  • the generation of the detection instruction may include one or more of the above three modes, that is, the multimedia playback device generates the detection instruction periodically, generates the detection instruction when the power is turned on, and generates the detection instruction when the signal source button is triggered, and may exist at the same time.
  • the obtaining module 20 is configured to acquire a video signal in a signal source channel with a signal input;
  • the acquiring module 20 acquires a video signal in the signal source channel (the signal source channel with the signal input) for a period of time, and respectively acquires all the signal source channels having the signal input. Video data.
  • the acquiring module 20 may not acquire the video signal in the signalless input signal source channel, or do nothing, or let the detecting module 10 continue to detect whether other signal source channels are detected. There is a signal input.
  • the buffer module 30 is configured to buffer the video signal in the signal source channel that has acquired the signal input into the memory;
  • the encoding process of the source channel is called, the acquired video signal is encoded into a video stream, and then the encoded video stream is buffered into the memory (for example, double Corresponding locations in the rate SDRAM) (different source channels correspond to different cache addresses) for the multimedia playback device to read the display.
  • the memory for example, double Corresponding locations in the rate SDRAM
  • the reading module 40 is configured to: when the signal source switching instruction is detected, read the video signal corresponding to the switched source channel from the memory, and display the video signal.
  • the reading module 40 detects the signal source switching instruction, and reads the video signal corresponding to the switched signal source channel from the memory: if the switched signal source channel is a signal input signal
  • the source channel reads the video stream buffered in the memory by the read module 40 to perform image preprocessing (image preprocessing including image reading, image decoding, audio and video synchronization processing, and display format adjustment).
  • image preprocessing including image reading, image decoding, audio and video synchronization processing, and display format adjustment.
  • the display data is sent to the CPU of the multimedia playing device, and is displayed through the CPU display channel; if the switched source channel is a signal source channel without signal input, the signal is not buffered due to no signal in the memory.
  • the video signal of the input source channel so the reading module 40 can not read the signal, that is, no signal is displayed.
  • the signal source switching device proposed in this embodiment detects the signal input state (ie, presence/absence of signal input) of each signal source channel of the multimedia playback device, and detects all the signal source channels that have signal input.
  • the video signal is pre-cached into the memory.
  • the pre-cached video signal is directly read from the switched source channel for display, eliminating the video of the switched source channel.
  • the signal is buffered to the memory for processing, so that the switched image signal can be displayed more quickly when the signal source channel is switched, the visual pause when switching the signal source channel is greatly reduced, and the visual effect of the multimedia playing device is improved.
  • the obtaining module 20 is further configured to acquire a video signal within a preset duration in the signal source channel with the signal input.
  • the length of the video signal acquired by the obtaining module 20 can be preset, and can be reasonably set according to the remaining resource size of the CPU of the specific multimedia playing device. For example, when the multimedia playing device runs more processes and the CPU resources are less, The duration of the video signal of the source channel with the signal input can be set smaller (for example, 3 seconds, 5 seconds), thereby reducing the CPU resource requirement of the multimedia playback device and reducing the burden on the CPU of the multimedia playback device. The use of multimedia playback devices runs more smoothly.
  • the switching device of the signal source of the embodiment can set the duration of the video signal in the signal source channel with the signal input, and can perform corresponding modification and setting according to different operating burdens of the multimedia playing device, thereby ensuring multimedia. Smooth operation of the playback device.
  • FIG. 5 is a schematic diagram of functional modules of a second embodiment of a signal source switching apparatus according to the present invention.
  • the switching device of the signal source further includes:
  • the identification module 50 is configured to identify a signal source channel with a signal input.
  • the identification module 50 When detecting that the signal source channel of the multimedia playing device has a signal input, the identification module 50 identifies the signal source channel (the signal source channel with the signal input).
  • the identifier module 50 can be identified in multiple manners, for example, 1. the corresponding channel of the signal source channel can be highlighted by a high-brightness or a color background, and the source channel can be in an interactive interface. The words “with/with signal” are displayed on the corresponding options.
  • the identification module 50 of the switching device of the signal source may display dark grayscale brightness on the corresponding interface of the signal source channel without signal input when the signal source channel of the multimedia playback device has no signal input, or The signal source channel without signal input is shielded (not displayed) in the corresponding interface on the interactive interface; or, the identification module 50 of the switching device of the signal source can have a signal source channel with signal input and a signal source with no signal input.
  • the corresponding options of the channel on the interactive interface are divided into two types of separate display (for example, divided into "with signal” and "no signal” separately).
  • the signal source switching device of the embodiment identifies the signal source channel with the signal input through the identification module 50, so that the user can clearly know which signal source channels have signal input, thereby avoiding the user in switching the signal source channel.
  • the source channel (including the signal source channel with signal input and the signal source channel without signal input) is blindly switched, so that when the user switches the signal source channel, it can switch to the source channel that you want to watch more accurately and efficiently. .
  • FIG. 6 is a schematic diagram of a refinement function module of a cache module in a third embodiment of a signal source switching apparatus according to the present invention.
  • the cache module 30 includes:
  • the encoding unit 31 is configured to encode the video signal in the signal source channel that has acquired the signal input;
  • the encoding unit 31 calls an encoding program of the source channel of the acquired video signal, and encodes the acquired video signal into a video stream.
  • the determining unit 32 is configured to compare the encoded video signal with a video signal pre-cached in the memory corresponding to the signal source channel in the memory;
  • the determining unit 32 buffers the video signal pre-cached in the memory corresponding to the signal source channel with the signal input in the memory (that is, the video stream whose signal source channel has been buffered in the memory) An alignment is made to determine if the video signal in the source channel with the signal input is updated.
  • the holding unit 33 is configured to determine whether the encoded video signal is the same as the video signal pre-cached in the memory
  • the holding unit 33 can buffer the video signal pre-cached in the memory corresponding to the signal source channel with the signal input in the memory (that is, the video stream with the signal input channel already buffered in the memory)
  • the comparison is performed to determine whether the video signal in the signal source channel with the signal input is updated, that is, whether the encoded video signal is identical to the video signal pre-cached in the memory.
  • the replacing unit 34 is configured to replace the encoded video signal with a video signal pre-cached in the memory, and replace the encoded video signal with a video signal pre-cached in the memory.
  • the replacement unit 34 will encode the coded
  • the video signal replaces the video signal pre-cached in the memory, that is, the video signal pre-cached in the memory is cleared, and the encoded video signal is buffered to form the latest video signal pre-cached in the memory, and the next encoded video signal is Is it the same as the latest video signal pre-cached in memory?
  • the switching device of the signal source of the embodiment detects the presence or absence of the video signal in the signal source channel with the signal input.
  • the newly acquired video signal is encoded and replaced with the corresponding pre-cached in the memory.
  • the video signal avoids the use of memory by useless video signals; at the same time, when there is no update, the video signal corresponding to the pre-cached memory in the memory is directly kept unchanged, and the encoded video signal is deleted without being cached. , effectively reducing the occupation of the CPU resources of the multimedia playback device.

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Abstract

A signal source switching method is disclosed. The method comprises the following steps: upon detecting a test command, testing whether each signal source channel of a multimedia playback device has signal input; obtaining the video signals of signal source channels having signal input; on the basis of preset caching rules, encoding and caching to a memory the video signals obtained; and, upon detecting a switch signal source command, reading from the memory the video signal corresponding to the post-switch signal source channel, and displaying the video signal. A signal source switching device is also disclosed. In the signal source switching method and device of the present invention, when switching signal source channels, the post-switch image signal may be displayed more quickly, thereby greatly reducing visible freezing when switching signal source channels, and thus improving the visual effects of the multimedia playback device.

Description

信号源的切换方法及装置  Signal source switching method and device

技术领域Technical field

本发明涉及显示设备领域，尤其涉及信号源的切换方法及装置。The present invention relates to the field of display devices, and in particular, to a method and an apparatus for switching a signal source.

背景技术Background technique

目前电视机作为客厅娱乐终端，不但承担电视机本身娱乐功能的使用，同时由于电视机具有多个外设信号端口，因此电视机也是作为各种外设的显示终端。随着外设产品越来越多，功能越来越丰富，用户切换信号源来播放不同视频内容也变得频繁。但是目前的电视机在每次切换信号源时，都需要退出切换前的信号源的播放进程，再调用切换后的信号源的初始化数据，然后才显示切换后的信号源的视频数据，这样造成信号源的切换过程缓慢和信号显示慢，从而在切换信号源形成视觉停留，导致视觉效果差。At present, the television as a living room entertainment terminal not only undertakes the use of the entertainment function of the television itself, but also has a plurality of peripheral signal ports, so the television is also a display terminal as various peripherals. With more and more peripheral products and more and more functions, it is also frequent for users to switch signal sources to play different video content. However, every time the TV set switches the signal source, it needs to exit the playback process of the signal source before switching, and then call the initialization data of the switched signal source, and then display the video data of the switched signal source, thus causing The switching process of the signal source is slow and the signal display is slow, which forms a visual pause in switching the signal source, resulting in poor visual effects.

发明内容Summary of the invention

本发明的主要目的在于解决多媒体播放设备由于切换信号源过程缓慢和信号显示慢而导致视觉效果差的技术问题。The main object of the present invention is to solve the technical problem that the multimedia playback device has poor visual effects due to slow process of switching signal sources and slow signal display.

为实现上述目的，本发明提供一种信号源的切换方法，所述信号源的切换方法包括以下步骤：To achieve the above object, the present invention provides a method for switching a signal source, and the method for switching the signal source includes the following steps:

在侦测到检测指令时，检测多媒体播放设备的各个信号源通道是否有信号输入；When detecting the detection instruction, detecting whether each signal source channel of the multimedia playback device has a signal input;

获取有信号输入的信号源通道中的视频信号；Obtaining a video signal in a source channel having a signal input;

将所获取有信号输入的信号源通道中的视频信号编码缓存到内存；Encoding and encoding the video signal in the source channel with the signal input into the memory;

在侦测到信号源切换指令时，从所述内存中读取出切换后的信号源通道对应的视频信号，并显示所述视频信号。When the signal source switching instruction is detected, the video signal corresponding to the switched source channel is read from the memory, and the video signal is displayed.

优选地，在所述获取有信号输入的信号源通道中的视频信号的步骤之前，所述信号源的切换方法还包括：Preferably, before the step of acquiring the video signal in the signal source channel with the signal input, the method for switching the signal source further includes:

对有信号输入的信号源通道进行标识。Identify the source channel with signal input.

优选地，所述获取有信号输入的信号源通道中的视频信号的步骤包括：Preferably, the step of acquiring the video signal in the signal source channel with the signal input comprises:

获取有信号输入的信号源通道中预设时长内的视频信号。Obtain the video signal within the preset duration in the source channel with signal input.

优选地，所述将所获取有信号输入的信号源通道中的视频信号编码缓存到内存的步骤包括：Preferably, the step of buffering the video signal encoded in the signal source channel with the signal input into the memory includes:

将所获取有信号输入的信号源通道中的视频信号进行编码；Encoding the video signal in the source channel from which the signal is input;

判断所述编码后的视频信号与预先缓存在内存中的视频信号是否相同；Determining whether the encoded video signal is the same as a video signal pre-cached in the memory;

若所述编码后的视频信号与所述预先缓存在内存中的视频信号相同，则将所述编码后的视频信号删除，并保持所述预先缓存在内存中的视频信号；If the encoded video signal is the same as the video signal pre-cached in the memory, deleting the encoded video signal, and maintaining the video signal pre-cached in the memory;

若所述编码后的视频信号与所述预先缓存在内存中的视频信号不同，则将所述编码后的视频信号替换所述预先缓存在内存中的视频信号。And if the encoded video signal is different from the video signal pre-cached in the memory, replacing the encoded video signal with the video signal pre-cached in the memory.

优选地，所述检测指令为所述多媒体播放设备定时产生的指令或所述多媒体播放设备开机时产生的指令或信号源按键触发时产生的指令。Preferably, the detecting instruction is an instruction generated by the multimedia playing device at a timing or an instruction generated when the multimedia playing device is powered on or an instruction generated when a signal source button is triggered.

此外，为实现上述目的，本发明还提供一种信号源的切换装置，所述信号源的切换装置包括：In addition, in order to achieve the above object, the present invention further provides a switching device for a signal source, where the switching device of the signal source includes:

检测模块，用于在侦测到检测指令时，检测多媒体播放设备的各个信号源通道是否有信号输入；The detecting module is configured to detect whether each signal source channel of the multimedia playing device has a signal input when detecting the detecting instruction;

获取模块，用于获取有信号输入的信号源通道中的视频信号；An acquisition module, configured to acquire a video signal in a signal source channel with a signal input;

缓存模块，用于将所获取有信号输入的信号源通道中的视频信号编码缓存到内存；a buffer module, configured to buffer a video signal in the source channel of the acquired signal input into the memory;

读取模块，用于在侦测到信号源切换指令时，从所述内存中读取出切换后的信号源通道对应的视频信号，并显示所述视频信号。And a reading module, configured to: when the signal source switching instruction is detected, read a video signal corresponding to the switched source channel from the memory, and display the video signal.

优选地，所述信号源的切换装置还包括：Preferably, the switching device of the signal source further includes:

标识模块，用于对有信号输入的信号源通道进行标识。An identification module for identifying a source channel having a signal input.

优选地，所述获取模块还用于获取有信号输入的信号源通道中预设时长内的视频信号。Preferably, the acquiring module is further configured to acquire a video signal within a preset duration in a signal source channel having a signal input.

优选地，所述缓存模块包括：Preferably, the cache module comprises:

编码单元，用于将所获取有信号输入的信号源通道中的视频信号进行编码；a coding unit, configured to encode a video signal in a signal source channel obtained with a signal input;

判断单元，用于判断所述编码后的视频信号与预先缓存在内存中的视频信号是否相同；a determining unit, configured to determine whether the encoded video signal is the same as a video signal that is pre-cached in the memory;

保持单元，用于在所述编码后的视频信号与所述预先缓存在内存中的视频信号相同，则将所述编码后的视频信号删除，并保持所述预先缓存在内存中的视频信号；a holding unit, configured to: after the encoded video signal is the same as the video signal pre-cached in the memory, delete the encoded video signal, and maintain the video signal pre-cached in the memory;

替换单元，用于在所述编码后的视频信号与所述预先缓存在内存中的视频信号不同，则将所述编码后的视频信号替换所述预先缓存在内存中的视频信号。And a replacing unit, configured to replace the encoded video signal with the video signal pre-cached in the memory, after the encoded video signal is different from the video signal pre-cached in the memory.

优选地，所述检测指令或所述多媒体播放设备定时产生的指令或所述多媒体播放设备开机时产生的指令或信号源按键触发时产生的指令。Preferably, the detecting instruction or the instruction generated by the multimedia playing device timing or the instruction generated when the multimedia playing device is powered on or the command generated by the signal source button is triggered.

本发明的信号源的切换方法和装置，通过对多媒体播放设备的各个信号源通道的信号输入状态（即有/无信号输入）的检测，并将检测到的全部有信号输入的信号源通道中的视频信号预先进行缓存到内存中，当用户选择切换信号源通道时，直接从切换后的信号源通道中读取预先缓存的视频信号进行显示，省去了将切换后的信号源通道的视频信号缓存到内存的处理，从而信号源通道切换时可以更快显示切换后的图像信号，大幅降低切换信号源通道时的视觉停留，提高了多媒体播放设备的视觉效果。The method and device for switching a signal source of the present invention, by detecting the signal input state (ie, with/without signal input) of each signal source channel of the multimedia playback device, and detecting all the signal source channels that have signal input The video signal is pre-cached into the memory. When the user selects to switch the source channel, the pre-cached video signal is directly read from the switched source channel for display, eliminating the video of the switched source channel. The signal is buffered to the memory for processing, so that the switched image signal can be displayed more quickly when the signal source channel is switched, the visual pause when the signal source channel is switched is greatly reduced, and the visual effect of the multimedia playback device is improved.

附图说明DRAWINGS

图1为本发明信号源的切换方法第一实施例的流程图；1 is a flowchart of a first embodiment of a method for switching a signal source according to the present invention;

图2为本发明信号源的切换方法第二实施例的流程图；2 is a flowchart of a second embodiment of a method for switching a signal source according to the present invention;

图3为图1中步骤S30的细化的流程图；3 is a flow chart of the refinement of step S30 in FIG. 1;

图4为本发明信号源的切换装置第一实施例的功能模块示意图；4 is a schematic diagram of functional modules of a first embodiment of a signal source switching apparatus according to the present invention;

图5为本发明信号源的切换装置第二实施例的功能模块示意图；5 is a schematic diagram of functional modules of a second embodiment of a signal source switching apparatus according to the present invention;

图6为本发明信号源的切换装置第三实施例中缓存模块的细化功能模块示意图。FIG. 6 is a schematic diagram of a refinement function module of a cache module in a third embodiment of a signal source switching apparatus according to the present invention.

本发明目的的实现、功能特点及优点将结合实施例，参照附图做进一步说明。The implementation, functional features, and advantages of the present invention will be further described in conjunction with the embodiments.

具体实施方式detailed description

应当理解，此处所描述的具体实施例仅仅用以解释本发明，并不用于限定本发明。It is understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

本发明提供一种信号源的切换方法，该信号源的切换方法运行于多媒体播放设备（例如电视机）中。The present invention provides a method of switching a signal source, the method of switching the signal source running in a multimedia playback device (such as a television).

参照图1，图1为本发明信号源的切换方法第一实施例的流程图。Referring to FIG. 1, FIG. 1 is a flowchart of a first embodiment of a method for switching a signal source according to the present invention.

在第一实施例中，该信号源的切换方法包括：In the first embodiment, the method for switching the signal source includes:

步骤S10，在侦测到检测指令时，检测多媒体播放设备的各个信号源通道是否有信号输入；Step S10: detecting, when detecting the detection instruction, detecting whether each signal source channel of the multimedia playback device has a signal input;

多媒体播放设备实时侦测检测指令，多媒体播放设备在侦测到检测指令时，检测多媒体播放设备的各个信号源通道是否有信号输入，以确认哪些信号源通道有信号输入，哪些信号源通道无信号输入。多媒体播放设备未侦测到检测指令，不进行任何操作或继续侦测检测指令。本实施例中，检测信号源通道有无信号输入，可通过信号源通道反馈的状态信号进行确定，例如，信号源通道有信号输入时，反馈的状态信号为第一电平（例如高电平），信号源通道无信号输入时，反馈的状态信号为与第一电平状态相反的第二电平（例如低电平）。The multimedia playback device detects the detection command in real time, and the multimedia playback device detects whether each signal source channel of the multimedia playback device has a signal input when detecting the detection instruction, to confirm which signal source channels have signal input, and which signal source channels have no signal. Input. The multimedia playback device does not detect the detection command, does not perform any operation or continues to detect the detection command. In this embodiment, detecting whether the signal source channel has a signal input can be determined by a status signal fed back by the signal source channel. For example, when the signal source channel has a signal input, the feedback status signal is at a first level (for example, a high level). When the signal source channel has no signal input, the feedback status signal is a second level (for example, a low level) opposite to the first level state.

本实施例中，1、检测指令可以为多媒体播放设备定时产生的指令，即实现对多媒体播放设备的各个信号源通道是否有信号输入的定时检测；例如，每隔1秒产生一个检测指令，则定时1秒中检测一次。2、检测指令也可以为多媒体播放设备开机时产生的指令，即多媒体播放设备在开机时就产生一个检测指令，开机时则对各个信号源通道是否有信号输入进行检测。3、检测指令还可以为信号源按键（例如，信号源通道选择菜单按键）触发时产生的指令，即在用户按下信号源按键时，产生检测指令，对各个信号源通道是否有信号输入进行检测。检测指令的产生可以包括上述三种方式中一种或多种方式，即多媒体播放设备定时产生检测指令、开机时产生检测指令以及在信号源按键触发时产生检测指令，可以同时存在。In this embodiment, the detection instruction may be an instruction generated by the multimedia playback device at a timing, that is, whether timing detection is performed on each signal source channel of the multimedia playback device; for example, a detection instruction is generated every 1 second. It is detected once in 1 second. 2. The detection command can also be an instruction generated when the multimedia playback device is powered on, that is, the multimedia playback device generates a detection command when the device is turned on, and detects whether there is a signal input for each signal source channel when the device is turned on. 3. The detection command can also be a command generated when the signal source button (for example, the signal source channel selects the menu button) is triggered, that is, when the user presses the signal source button, a detection command is generated, and whether each signal source channel has a signal input is performed. Detection. The generation of the detection instruction may include one or more of the above three modes, that is, the multimedia playback device generates the detection instruction periodically, generates the detection instruction when the power is turned on, and generates the detection instruction when the signal source button is triggered, and may exist at the same time.

步骤S20，获取有信号输入的信号源通道中的视频信号；Step S20, acquiring a video signal in a signal source channel with a signal input;

确定多媒体播放设备的信号源通道有信号输入时，获取该信号源通道（有信号输入的信号源通道）中一段时长内的视频信号，分别获取全部有信号输入的信号源通道中的视频数据。当多媒体播放设备的信号源通道无信号输入时，可以执行不获取该无信号输入信号源通道中的视频信号，或者不做任何操作，或者，继续检测其他信号源通道是否有信号输入。When it is determined that the signal source channel of the multimedia playing device has a signal input, the video signal in the signal source channel (the signal source channel with the signal input) is acquired for a period of time, and the video data in all the signal source channels with the signal input are respectively obtained. When the signal source channel of the multimedia playing device has no signal input, the video signal in the source channel of the no-signal input signal may be not performed, or no operation may be performed, or whether the signal input of other signal source channels is continuously detected.

步骤S30，将所获取有信号输入的信号源通道中的视频信号编码缓存到内存；Step S30, buffering the video signal in the signal source channel with the signal input into the memory;

在将获取有信号输入的信号源通道中的视频信号后，调用该信号源通道的编码程序，将获取的视频信号编码成视频流，然后将编码成的视频流缓存到内存（例如，双倍速率SDRAM）中的相应位置（不同的信号源通道对应不同的缓存地址），以供多媒体播放设备读取显示。After the video signal in the source channel with the signal input is obtained, the encoding process of the source channel is called, the acquired video signal is encoded into a video stream, and then the encoded video stream is buffered into the memory (for example, double Corresponding locations in the rate SDRAM) (different source channels correspond to different cache addresses) for the multimedia playback device to read the display.

步骤S40，在侦测到信号源切换指令时，从内存中读取出切换后的信号源通道对应的视频信号，并显示视频信号。Step S40, when the signal source switching instruction is detected, the video signal corresponding to the switched source channel is read from the memory, and the video signal is displayed.

在用户切换信号源通道时，多媒体播放设备侦测到信号源切换指令，从内存中读取出切换后的信号源通道对应的视频信号：若切换后的信号源通道是有信号输入的信号源通道，则即读取出切换后的信号源通道缓存在内存中的视频流进行图像预处理（图像预处理包括图像读取、图像解码、音视频同步处理和显示格式调整），完成图像预处理后，将显示数据送到多媒体播放设备的CPU，通过CPU显示通道显示出来；若切换后的信号源通道是无信号输入的信号源通道，则由于内存中无缓存该无信号输入的信号源通道的视频信号，因此读取不到信号，即无信号显示。When the user switches the signal source channel, the multimedia playback device detects the signal source switching instruction, and reads the video signal corresponding to the switched source channel from the memory: if the switched source channel is a signal source with signal input The channel, that is, the video stream buffered in the memory after the switching source channel is read for image preprocessing (image preprocessing including image reading, image decoding, audio and video synchronization processing and display format adjustment), and image preprocessing is completed. After that, the display data is sent to the CPU of the multimedia playing device, and is displayed through the CPU display channel; if the switched source channel is a signal source channel without signal input, the signal source channel without signal input is not buffered in the memory. The video signal, so the signal is not read, that is, no signal is displayed.

本实施例提出的信号源的切换方法，通过对多媒体播放设备的各个信号源通道的信号输入状态（即有/无信号输入）的检测，并将检测到的全部有信号输入的信号源通道中的视频信号预先进行缓存到内存中，当用户选择切换信号源通道时，直接从切换后的信号源通道中读取预先缓存的视频信号进行显示，省去了将切换后的信号源通道的视频信号缓存到内存的处理，从而信号源通道切换时可以更快显示切换后的图像信，大幅降低切换信号源通道时的视觉停留，提高了多媒体播放设备的视觉效果。The method for switching the signal source proposed in this embodiment is to detect the signal input state (ie, with/without signal input) of each signal source channel of the multimedia playback device, and to detect all the signal source channels that have signal input. The video signal is pre-cached into the memory. When the user selects to switch the source channel, the pre-cached video signal is directly read from the switched source channel for display, eliminating the video of the switched source channel. The signal is buffered to the memory for processing, so that the switched image signal can be displayed more quickly when the signal source channel is switched, the visual pause when switching the signal source channel is greatly reduced, and the visual effect of the multimedia playing device is improved.

进一步地，在第一实施例中，步骤S20中，获取有信号输入的信号源通道中的视频信号的步骤包括：获取有信号输入的信号源通道中预设时长内的视频信号。Further, in the first embodiment, in step S20, the step of acquiring the video signal in the signal source channel with the signal input comprises: acquiring the video signal within the preset duration in the signal source channel with the signal input.

获取的视频信号的长度可预先设定，可根据具体的多媒体播放设备的CPU的剩余资源大小进行合理的设定，例如在多媒体播放设备运行的进程较多，CPU资源较少时，可将获取有信号输入的信号源通道的视频信号的时长设置小一些（例如3秒、5秒），从而减小对多媒体播放设备的CPU资源的需求，降低多媒体播放设备的CPU的负担，使得多媒体播放设备的使用运行更顺畅。The length of the acquired video signal can be preset, and can be set according to the remaining resource size of the CPU of the specific multimedia playback device. For example, when the multimedia playback device runs more processes and the CPU resources are less, the data can be obtained. The duration of the video signal of the signal source channel with signal input is set smaller (for example, 3 seconds, 5 seconds), thereby reducing the CPU resource requirement of the multimedia playback device, reducing the burden on the CPU of the multimedia playback device, and making the multimedia playback device The use of the run is smoother.

本实施例的信号源的切换方法，通过获取有信号输入的信号源通道中视频信号的时长可自行设定，可根据多媒体播放设备的不同运行负担情况下进行相应的修改设定，从而保证多媒体播放设备的顺畅的运行使用。In the method for switching the signal source of the embodiment, the duration of the video signal in the signal source channel with the signal input can be set by itself, and the corresponding modification setting can be performed according to different operating burdens of the multimedia playing device, thereby ensuring multimedia. Smooth operation of the playback device.

参照图2，图2为本发明信号源的切换方法第二实施例的流程图。Referring to FIG. 2, FIG. 2 is a flowchart of a second embodiment of a method for switching a signal source according to the present invention.

在第二实施例中，在步骤S20之前，信号源的切换方法还包括：In the second embodiment, before the step S20, the method for switching the signal source further includes:

步骤S50，对有信号输入的信号源通道进行标识。In step S50, the signal source channel with signal input is identified.

在检测到多媒体播放设备的信号源通道有信号输入时，则将该信号源通道（有信号输入的信号源通道）标识出来。标识的方式可为多种，例如，1、可将该信号源通道在交互界面上对应的选项进行高亮度突出显示或彩色背景显示等；2、可将该信号源通道在交互界面上对应的选项上显示出“有/有信号”等字样。另外，该信号源的切换方法，还可在多媒体播放设备的信号源通道无信号输入时，将无信号输入的信号源通道在交互界面上对应的选项进行暗灰亮度显示，或者将无信号输入的信号源通道在交互界面上对应的选项进行屏蔽（不显示）；又或者，该信号源的切换方法可将有信号输入的信号源通道和无信号输入的信号源通道在交互界面上对应的选项划分成两类分开显示（例如，划分为“有信号”和“无信号”分开显示）。When it is detected that the signal source channel of the multimedia playing device has a signal input, the signal source channel (the signal source channel with the signal input) is identified. The manner of the identification may be various, for example, 1. the corresponding arrangement of the signal source channel on the interactive interface may be highlighted by a high brightness or displayed in a color background; 2. the corresponding source channel may be corresponding to the interaction interface. The words “with/with signal” are displayed on the option. In addition, the signal source switching method can also display dark gray brightness of the corresponding signal source channel on the interactive interface when the signal source channel of the multimedia playback device has no signal input, or input no signal. The signal source channel is shielded (not displayed) in the corresponding interface on the interactive interface; or, the signal source switching method can correspond to the signal source channel with signal input and the signal source channel with no signal input on the interaction interface. The options are divided into two types of separate displays (for example, divided into "with signal" and "no signal").

本实施例的信号源的切换方法，通过将有信号输入的信号源通道进行标识，使得用户能够清楚的知道哪些信号源通道有信号输入，避免用户在切换信号源通道时，在各个信号源通道之间（包括有信号输入的信号源通道和无信号输入的信号源通道）盲目切换操作，从而使用户切换信号源通道时，更加准确、高效的切换到想要收看的信号源通道。In the method for switching the signal source of the embodiment, by identifying the signal source channel with the signal input, the user can clearly know which signal source channels have signal input, and avoid the user in each signal source channel when switching the signal source channel. The blind switching operation (including the signal source channel with signal input and the signal source channel without signal input) allows the user to switch to the source channel that you want to watch more accurately and efficiently when switching the source channel.

参照图3，图3为图1中步骤S30的细化的流程图。Referring to FIG. 3, FIG. 3 is a flow chart of the refinement of step S30 in FIG.

在第三实施例中，该信号源的切换方法的步骤S30包括：In the third embodiment, the step S30 of the method for switching the signal source includes:

步骤S301，将所获取有信号输入的信号源通道中的视频信号进行编码；Step S301, encoding a video signal in a signal source channel obtained with a signal input;

调用所获取视频信号的信号源通道的编码程序，将所获取的视频信号编码成视频流。The encoding process of the source channel of the acquired video signal is called, and the acquired video signal is encoded into a video stream.

步骤S302，判断编码后的视频信号与所述预先缓存在内存中的视频信号是否相同； Step S302, determining whether the encoded video signal is the same as the video signal pre-cached in the memory;

可通过将编码后的视频信号与内存中该有信号输入的信号源通道对应的预先缓存在内存中的视频信号（即该有信号输入的信号源通道已经缓存在内存中的视频流）进行比对，以确定该有信号输入的信号源通道中的视频信号有没有更新，即看编码后的视频信号与所述预先缓存在内存中的视频信号是否相同。The video signal pre-cached in the memory corresponding to the signal source channel having the signal input in the memory (that is, the video stream having the signal input channel already buffered in the memory) can be compared with the video signal corresponding to the signal source channel in the memory. To determine whether the video signal in the signal source channel with the signal input is updated, that is, whether the encoded video signal is the same as the video signal pre-cached in the memory.

步骤S303，若编码后的视频信号与预先缓存在内存中的视频信号相同，则将编码后的视频信号删除，并保持预先缓存在内存中的视频信号；Step S303, if the encoded video signal is the same as the video signal pre-cached in the memory, the encoded video signal is deleted, and the video signal pre-cached in the memory is held;

若比对结果为相同，说明该有信号输入的信号源通道中的视频信号没有更新，此时无需使用编码后的视频信号，将编码后的视频信号删除，并保持预先缓存在内存中的视频信号不变。If the comparison result is the same, it means that the video signal in the signal source channel with signal input is not updated. In this case, the encoded video signal is not needed, the encoded video signal is deleted, and the video pre-cached in the memory is kept. The signal does not change.

步骤S304，若编码后的视频信号与预先缓存在内存中的视频信号不同，则将编码后的视频信号替换预先缓存在内存中的视频信号。Step S304, if the encoded video signal is different from the video signal pre-cached in the memory, the encoded video signal is replaced with a video signal pre-cached in the memory.

若比对结果不相同，说明该有信号输入的信号源通道中的视频信号有更新，则需要更新内存中该有信号输入的信号源通道对应的预先缓存在内存中的视频信号，以使多媒体设备使用切换到该有信号输入的信号源通道时，读取到的是最新的视频信号进行显示；此时该预先缓存在内存中的视频信号已经没用了，因此将编码后的视频信号替换预先缓存在内存中的视频信号，即将预先缓存在内存中的视频信号清除，将编码后的视频信号缓存形成最新的预先缓存在内存中的视频信号，下次编码后的视频信号就与最新的预先缓存在内存中的视频信号进行比较是否相同。If the comparison result is different, indicating that the video signal in the signal source channel with the signal input is updated, it is necessary to update the video signal pre-cached in the memory corresponding to the signal source channel having the signal input in the memory, so that the multimedia is When the device switches to the signal source channel with signal input, the latest video signal is read for display; at this time, the video signal pre-cached in the memory is useless, so the encoded video signal is replaced. The video signal pre-cached in the memory is cleared, and the video signal pre-cached in the memory is cleared, and the encoded video signal is buffered to form the latest video signal pre-cached in the memory, and the next encoded video signal is updated with the latest one. The video signals pre-cached in the memory are compared for comparison.

本实施例的信号源的切换方法，通过检测有信号输入的信号源通道中的视频信号有无更新，在更新时，将新获取的视频信号编码后替换掉内存中对应的预先缓存在内存中的视频信号，避免了无用的视频信号对内存的占用；同时在无更新时，直接保持内存中对应的预先缓存在内存中的视频信号不变，将编码后的视频信号删除，而不进行缓存，有效的降低了对多媒体播放设备的CPU资源的占用。In the method for switching the signal source of the embodiment, by detecting whether the video signal in the signal source channel with the signal input is updated, when the update is performed, the newly acquired video signal is encoded, and the corresponding pre-cached in the memory is replaced in the memory. The video signal avoids the use of memory by useless video signals; at the same time, when there is no update, the video signal corresponding to the pre-cached memory in the memory is directly kept unchanged, and the encoded video signal is deleted without being cached. , effectively reducing the occupation of the CPU resources of the multimedia playback device.

本发明进一步提供一种信号源的切换装置，该信号源的切换装置运行于多媒体播放设备（例如电视机）中。The present invention further provides a switching device for a signal source, the switching device of which operates in a multimedia playback device, such as a television.

参照图4，图4为本发明信号源的切换装置第一实施例的功能模块示意图。Referring to FIG. 4, FIG. 4 is a schematic diagram of functional modules of a first embodiment of a signal source switching apparatus according to the present invention.

在第一实施例中，信号源的切换装置包括：In the first embodiment, the switching device of the signal source includes:

检测模块10，用于在侦测到检测指令时，检测多媒体播放设备的各个信号源通道是否有信号输入；The detecting module 10 is configured to detect whether each signal source channel of the multimedia playing device has a signal input when detecting the detecting instruction;

检测模块10侦测检测指令，检测模块10在侦测到检测指令时，检测多媒体播放设备的各个信号源通道是否有信号输入，以确认哪些信号源通道有信号输入，哪些信号源通道无信号输入。检测模块10未侦测到检测指令，不进行任何操作或继续侦测检测指令。本实施例中，检测信号源通道有无信号输入，可通过信号源通道反馈的状态信号进行确定，例如，信号源通道有信号输入时，反馈的状态信号为第一电平（例如高电平），信号源通道无信号输入时，反馈的状态信号为与第一电平状态相反的第二电平（例如低电平）。The detecting module 10 detects the detecting instruction, and when detecting the detecting command, the detecting module 10 detects whether each signal source channel of the multimedia playing device has a signal input, to confirm which signal source channels have signal input, and which signal source channels have no signal input. . The detection module 10 does not detect the detection instruction, does not perform any operation or continues to detect the detection instruction. In this embodiment, detecting whether the signal source channel has a signal input can be determined by a status signal fed back by the signal source channel. For example, when the signal source channel has a signal input, the feedback status signal is at a first level (for example, a high level). When the signal source channel has no signal input, the feedback status signal is a second level (for example, a low level) opposite to the first level state.

本实施例中，1、检测指令可以为多媒体播放设备定时产生的指令，即实现对多媒体播放设备的各个信号源通道是否有信号输入的定时检测；例如，每隔1秒产生一个检测指令，则定时1秒中检测一次。2、检测指令也可以为多媒体播放设备开机时产生的指令，即多媒体播放设备在开机时就产生一个检测指令，开机时则对各个信号源通道是否有信号输入进行检测。3、检测指令还可以为信号源按键（例如，信号源通道选择菜单按键）触发时产生的指令，即在用户按下信号源按键时，产生检测指令，对各个信号源通道是否有信号输入进行检测。检测指令的产生可以包括上述三种方式中一种或多种方式，即多媒体播放设备定时产生检测指令、开机时产生检测指令以及在信号源按键触发时产生检测指令，可以同时存在。In this embodiment, the detection instruction may be an instruction generated by the multimedia playback device at a timing, that is, whether timing detection is performed on each signal source channel of the multimedia playback device; for example, a detection instruction is generated every 1 second. It is detected once in 1 second. 2. The detection command can also be an instruction generated when the multimedia playback device is powered on, that is, the multimedia playback device generates a detection command when the device is turned on, and detects whether there is a signal input for each signal source channel when the device is turned on. 3. The detection command can also be a command generated when the signal source button (for example, the signal source channel selects the menu button) is triggered, that is, when the user presses the signal source button, a detection command is generated, and whether each signal source channel has a signal input is performed. Detection. The generation of the detection instruction may include one or more of the above three modes, that is, the multimedia playback device generates the detection instruction periodically, generates the detection instruction when the power is turned on, and generates the detection instruction when the signal source button is triggered, and may exist at the same time.

获取模块20，用于获取有信号输入的信号源通道中的视频信号；The obtaining module 20 is configured to acquire a video signal in a signal source channel with a signal input;

确定多媒体播放设备的信号源通道有信号输入时，获取模块20获取该信号源通道（有信号输入的信号源通道）中一段时长内的视频信号，分别获取全部有信号输入的信号源通道中的视频数据。当多媒体播放设备的信号源通道无信号输入时，获取模块20可以不获取该无信号输入信号源通道中的视频信号，或者不做任何操作，或者，让检测模块10继续检测其他信号源通道是否有信号输入。When it is determined that the signal source channel of the multimedia playing device has a signal input, the acquiring module 20 acquires a video signal in the signal source channel (the signal source channel with the signal input) for a period of time, and respectively acquires all the signal source channels having the signal input. Video data. When the signal source channel of the multimedia playing device has no signal input, the acquiring module 20 may not acquire the video signal in the signalless input signal source channel, or do nothing, or let the detecting module 10 continue to detect whether other signal source channels are detected. There is a signal input.

缓存模块30，用于将所获取有信号输入的信号源通道中的视频信号编码缓存到内存；The buffer module 30 is configured to buffer the video signal in the signal source channel that has acquired the signal input into the memory;

在将获取有信号输入的信号源通道中的视频信号后，调用该信号源通道的编码程序，将获取的视频信号编码成视频流，然后将编码成的视频流缓存到内存（例如，双倍速率SDRAM）中的相应位置（不同的信号源通道对应不同的缓存地址），以供多媒体播放设备读取显示。After the video signal in the source channel with the signal input is obtained, the encoding process of the source channel is called, the acquired video signal is encoded into a video stream, and then the encoded video stream is buffered into the memory (for example, double Corresponding locations in the rate SDRAM) (different source channels correspond to different cache addresses) for the multimedia playback device to read the display.

读取模块40，用于在侦测到信号源切换指令时，从内存中读取出切换后的信号源通道对应的视频信号，并显示视频信号。The reading module 40 is configured to: when the signal source switching instruction is detected, read the video signal corresponding to the switched source channel from the memory, and display the video signal.

在用户切换信号源通道时，读取模块40侦测到信号源切换指令，从内存中读取出切换后的信号源通道对应的视频信号：若切换后的信号源通道是有信号输入的信号源通道，则读取模块40即读取出切换后的信号源通道缓存在内存中的视频流进行图像预处理（图像预处理包括图像读取、图像解码、音视频同步处理和显示格式调整），完成图像预处理后，将显示数据送到多媒体播放设备的CPU，通过CPU显示通道显示出来；若切换后的信号源通道是无信号输入的信号源通道，则由于内存中无缓存该无信号输入的信号源通道的视频信号，因此读取模块40读取不到信号，即无信号显示。When the user switches the signal source channel, the reading module 40 detects the signal source switching instruction, and reads the video signal corresponding to the switched signal source channel from the memory: if the switched signal source channel is a signal input signal The source channel reads the video stream buffered in the memory by the read module 40 to perform image preprocessing (image preprocessing including image reading, image decoding, audio and video synchronization processing, and display format adjustment). After the image preprocessing is completed, the display data is sent to the CPU of the multimedia playing device, and is displayed through the CPU display channel; if the switched source channel is a signal source channel without signal input, the signal is not buffered due to no signal in the memory. The video signal of the input source channel, so the reading module 40 can not read the signal, that is, no signal is displayed.

本实施例提出的信号源的切换装置，通过对多媒体播放设备的各个信号源通道的信号输入状态（即有/无信号输入）的检测，并将检测到的全部有信号输入的信号源通道中的视频信号预先进行缓存到内存中，当用户选择切换信号源通道时，直接从切换后的信号源通道中读取预先缓存的视频信号进行显示，省去了将切换后的信号源通道的视频信号缓存到内存的处理，从而信号源通道切换时可以更快显示切换后的图像信，大幅降低切换信号源通道时的视觉停留，提高了多媒体播放设备的视觉效果。The signal source switching device proposed in this embodiment detects the signal input state (ie, presence/absence of signal input) of each signal source channel of the multimedia playback device, and detects all the signal source channels that have signal input. The video signal is pre-cached into the memory. When the user selects to switch the source channel, the pre-cached video signal is directly read from the switched source channel for display, eliminating the video of the switched source channel. The signal is buffered to the memory for processing, so that the switched image signal can be displayed more quickly when the signal source channel is switched, the visual pause when switching the signal source channel is greatly reduced, and the visual effect of the multimedia playing device is improved.

进一步地，获取模块20还用于获取有信号输入的信号源通道中预设时长内的视频信号。Further, the obtaining module 20 is further configured to acquire a video signal within a preset duration in the signal source channel with the signal input.

获取模块20获取的视频信号的长度可预先设定，可根据具体的多媒体播放设备的CPU的剩余资源大小进行合理的设定，例如在多媒体播放设备运行的进程较多，CPU资源较少时，可将获取有信号输入的信号源通道的视频信号的时长设置小一些（例如3秒、5秒），从而减小对多媒体播放设备的CPU资源的需求，降低多媒体播放设备的CPU的负担，使得多媒体播放设备的使用运行更顺畅。The length of the video signal acquired by the obtaining module 20 can be preset, and can be reasonably set according to the remaining resource size of the CPU of the specific multimedia playing device. For example, when the multimedia playing device runs more processes and the CPU resources are less, The duration of the video signal of the source channel with the signal input can be set smaller (for example, 3 seconds, 5 seconds), thereby reducing the CPU resource requirement of the multimedia playback device and reducing the burden on the CPU of the multimedia playback device. The use of multimedia playback devices runs more smoothly.

本实施例的信号源的切换装置，通过获取有信号输入的信号源通道中视频信号的时长可自行设定，可根据多媒体播放设备的不同运行负担情况下进行相应的修改设定，从而保证多媒体播放设备的顺畅的运行使用。The switching device of the signal source of the embodiment can set the duration of the video signal in the signal source channel with the signal input, and can perform corresponding modification and setting according to different operating burdens of the multimedia playing device, thereby ensuring multimedia. Smooth operation of the playback device.

参照图5，图5为本发明信号源的切换装置第二实施例的功能模块示意图。在第二实施例中，信号源的切换装置还包括：Referring to FIG. 5, FIG. 5 is a schematic diagram of functional modules of a second embodiment of a signal source switching apparatus according to the present invention. In the second embodiment, the switching device of the signal source further includes:

标识模块50，用于对有信号输入的信号源通道进行标识。The identification module 50 is configured to identify a signal source channel with a signal input.

标识模块50在检测到多媒体播放设备的信号源通道有信号输入时，则将该信号源通道（有信号输入的信号源通道）标识出来。标识模块50标识的方式可为多种，例如，1、可将该信号源通道在交互界面上对应的选项进行高亮度突出显示或彩色背景显示等；2、可将该信号源通道在交互界面上对应的选项上显示出“有/有信号”等字样。另外，该信号源的切换装置的标识模块50还可在多媒体播放设备的信号源通道无信号输入时，将无信号输入的信号源通道在交互界面上对应的选项进行暗灰亮度显示，或者将无信号输入的信号源通道在交互界面上对应的选项进行屏蔽（不显示）；又或者，该信号源的切换装置的标识模块50可将有信号输入的信号源通道和无信号输入的信号源通道在交互界面上对应的选项划分成两类分开显示（例如，划分为“有信号”和“无信号”分开显示）。When detecting that the signal source channel of the multimedia playing device has a signal input, the identification module 50 identifies the signal source channel (the signal source channel with the signal input). The identifier module 50 can be identified in multiple manners, for example, 1. the corresponding channel of the signal source channel can be highlighted by a high-brightness or a color background, and the source channel can be in an interactive interface. The words “with/with signal” are displayed on the corresponding options. In addition, the identification module 50 of the switching device of the signal source may display dark grayscale brightness on the corresponding interface of the signal source channel without signal input when the signal source channel of the multimedia playback device has no signal input, or The signal source channel without signal input is shielded (not displayed) in the corresponding interface on the interactive interface; or, the identification module 50 of the switching device of the signal source can have a signal source channel with signal input and a signal source with no signal input. The corresponding options of the channel on the interactive interface are divided into two types of separate display (for example, divided into "with signal" and "no signal" separately).

本实施例的信号源的切换装置，通过标识模块50将有信号输入的信号源通道进行标识，使得用户能够清楚的知道哪些信号源通道有信号输入，避免用户在切换信号源通道时，在各个信号源通道之间（包括有信号输入的信号源通道和无信号输入的信号源通道）盲目切换操作，从而使用户切换信号源通道时，更加准确、高效的切换到想要收看的信号源通道。The signal source switching device of the embodiment identifies the signal source channel with the signal input through the identification module 50, so that the user can clearly know which signal source channels have signal input, thereby avoiding the user in switching the signal source channel. The source channel (including the signal source channel with signal input and the signal source channel without signal input) is blindly switched, so that when the user switches the signal source channel, it can switch to the source channel that you want to watch more accurately and efficiently. .

参照图6，图6为本发明信号源的切换装置第三实施例中缓存模块的细化功能模块示意图。Referring to FIG. 6, FIG. 6 is a schematic diagram of a refinement function module of a cache module in a third embodiment of a signal source switching apparatus according to the present invention.

第三实施例的技术方案基于第一实施例的技术方案。在第三实施例中，缓存模块30包括：The technical solution of the third embodiment is based on the technical solution of the first embodiment. In the third embodiment, the cache module 30 includes:

编码单元31，用于将所获取有信号输入的信号源通道中的视频信号进行编码；The encoding unit 31 is configured to encode the video signal in the signal source channel that has acquired the signal input;

编码单元31调用所获取视频信号的信号源通道的编码程序，将所获取的视频信号编码成视频流。The encoding unit 31 calls an encoding program of the source channel of the acquired video signal, and encodes the acquired video signal into a video stream.

判断单元32，用于将编码后的视频信号与内存中该信号源通道对应的预先缓存在内存中的视频信号进行比对；The determining unit 32 is configured to compare the encoded video signal with a video signal pre-cached in the memory corresponding to the signal source channel in the memory;

判断单元32通过将编码后的视频信号与内存中该有信号输入的信号源通道对应的预先缓存在内存中的视频信号（即该有信号输入的信号源通道已经缓存在内存中的视频流）进行比对，以判定该有信号输入的信号源通道中的视频信号有没有更新。The determining unit 32 buffers the video signal pre-cached in the memory corresponding to the signal source channel with the signal input in the memory (that is, the video stream whose signal source channel has been buffered in the memory) An alignment is made to determine if the video signal in the source channel with the signal input is updated.

保持单元33，用于判断编码后的视频信号与所述预先缓存在内存中的视频信号是否相同； The holding unit 33 is configured to determine whether the encoded video signal is the same as the video signal pre-cached in the memory;

保持单元33可通过将编码后的视频信号与内存中该有信号输入的信号源通道对应的预先缓存在内存中的视频信号（即该有信号输入的信号源通道已经缓存在内存中的视频流）进行比对，以确定该有信号输入的信号源通道中的视频信号有没有更新，即看编码后的视频信号与所述预先缓存在内存中的视频信号是否相同。The holding unit 33 can buffer the video signal pre-cached in the memory corresponding to the signal source channel with the signal input in the memory (that is, the video stream with the signal input channel already buffered in the memory) The comparison is performed to determine whether the video signal in the signal source channel with the signal input is updated, that is, whether the encoded video signal is identical to the video signal pre-cached in the memory.

替换单元34，用于在编码后的视频信号与预先缓存在内存中的视频信号不同，则将编码后的视频信号替换预先缓存在内存中的视频信号。The replacing unit 34 is configured to replace the encoded video signal with a video signal pre-cached in the memory, and replace the encoded video signal with a video signal pre-cached in the memory.

若比对结果不相同，说明该有信号输入的信号源通道中的视频信号有更新，则需要更新内存中该有信号输入的信号源通道对应的预先缓存在内存中的视频信号，以使多媒体设备使用切换到该有信号输入的信号源通道时，读取到的是最新的视频信号进行显示；此时该预先缓存在内存中的视频信号已经没用了，因此替换单元34将编码后的视频信号替换预先缓存在内存中的视频信号，即将预先缓存在内存中的视频信号清除，将编码后的视频信号缓存形成最新的预先缓存在内存中的视频信号，下次编码后的视频信号就与最新的预先缓存在内存中的视频信号进行比较是否相同。If the comparison result is different, indicating that the video signal in the signal source channel with the signal input is updated, it is necessary to update the video signal pre-cached in the memory corresponding to the signal source channel having the signal input in the memory, so that the multimedia is When the device switches to the signal source channel with signal input, the latest video signal is read for display; at this time, the video signal pre-cached in the memory is no longer used, so the replacement unit 34 will encode the coded The video signal replaces the video signal pre-cached in the memory, that is, the video signal pre-cached in the memory is cleared, and the encoded video signal is buffered to form the latest video signal pre-cached in the memory, and the next encoded video signal is Is it the same as the latest video signal pre-cached in memory?

本实施例的信号源的切换装置，通过检测有信号输入的信号源通道中的视频信号有无更新，在更新时，将新获取的视频信号编码后替换掉内存中对应的预先缓存在内存中的视频信号，避免了无用的视频信号对内存的占用；同时在无更新时，直接保持内存中对应的预先缓存在内存中的视频信号不变，将编码后的视频信号删除，而不进行缓存，有效的降低了对多媒体播放设备的CPU资源的占用。The switching device of the signal source of the embodiment detects the presence or absence of the video signal in the signal source channel with the signal input. When updating, the newly acquired video signal is encoded and replaced with the corresponding pre-cached in the memory. The video signal avoids the use of memory by useless video signals; at the same time, when there is no update, the video signal corresponding to the pre-cached memory in the memory is directly kept unchanged, and the encoded video signal is deleted without being cached. , effectively reducing the occupation of the CPU resources of the multimedia playback device.

以上仅为本发明的优选实施例，并非因此限制本发明的专利范围，凡是利用本发明说明书及附图内容所作的等效结构或等效流程变换，或直接或间接运用在其他相关的技术领域，均同理包括在本发明的专利保护范围内。The above are only the preferred embodiments of the present invention, and are not intended to limit the scope of the invention, and the equivalent structure or equivalent process transformations made by the description of the present invention and the drawings are directly or indirectly applied to other related technical fields. The same is included in the scope of patent protection of the present invention.

Claims (14)

一种信号源的切换方法，其特征在于，所述信号源的切换方法包括以下步骤： A method for switching a signal source, characterized in that the method for switching the signal source comprises the following steps: 在侦测到检测指令时，检测多媒体播放设备的各个信号源通道是否有信号输入；When detecting the detection instruction, detecting whether each signal source channel of the multimedia playback device has a signal input; 获取有信号输入的信号源通道中的视频信号；Obtaining a video signal in a source channel having a signal input; 将所获取有信号输入的信号源通道中的视频信号编码缓存到内存；Encoding and encoding the video signal in the source channel with the signal input into the memory; 在侦测到信号源切换指令时，从所述内存中读取出切换后的信号源通道对应的视频信号，并显示所述视频信号。When the signal source switching instruction is detected, the video signal corresponding to the switched source channel is read from the memory, and the video signal is displayed. 如权利要求1所述的信号源的切换方法，其特征在于，所述将所获取有信号输入的信号源通道中的视频信号编码缓存到内存的步骤包括：The method for switching a signal source according to claim 1, wherein the step of buffering the video signal encoded in the signal source channel with the signal input into the memory comprises: 将所获取有信号输入的信号源通道中的视频信号进行编码；Encoding the video signal in the source channel from which the signal is input; 判断所述编码后的视频信号与预先缓存在内存中的视频信号是否相同；Determining whether the encoded video signal is the same as a video signal pre-cached in the memory; 若所述编码后的视频信号与所述预先缓存在内存中的视频信号相同，则将所述编码后的视频信号删除，并保持所述预先缓存在内存中的视频信号；If the encoded video signal is the same as the video signal pre-cached in the memory, deleting the encoded video signal, and maintaining the video signal pre-cached in the memory; 若所述编码后的视频信号与所述预先缓存在内存中的视频信号不同，则将所述编码后的视频信号替换所述预先缓存在内存中的视频信号。And if the encoded video signal is different from the video signal pre-cached in the memory, replacing the encoded video signal with the video signal pre-cached in the memory. 如权利要求1所述的信号源的切换方法，其特征在于，在所述获取有信号输入的信号源通道中的视频信号的步骤之前，所述信号源的切换方法还包括：The method for switching a signal source according to claim 1, wherein before the step of acquiring the video signal in the signal source channel having the signal input, the method for switching the signal source further comprises: 对有信号输入的信号源通道进行标识。Identify the source channel with signal input. 如权利要求3所述的信号源的切换方法，其特征在于，所述将所获取有信号输入的信号源通道中的视频信号编码缓存到内存的步骤包括：The method for switching a signal source according to claim 3, wherein the step of buffering the video signal in the source channel of the signal input signal into the memory comprises: 将所获取有信号输入的信号源通道中的视频信号进行编码；Encoding the video signal in the source channel from which the signal is input; 判断所述编码后的视频信号与预先缓存在内存中的视频信号是否相同；Determining whether the encoded video signal is the same as a video signal pre-cached in the memory; 若所述编码后的视频信号与所述预先缓存在内存中的视频信号相同，则将所述编码后的视频信号删除，并保持所述预先缓存在内存中的视频信号；If the encoded video signal is the same as the video signal pre-cached in the memory, deleting the encoded video signal, and maintaining the video signal pre-cached in the memory; 若所述编码后的视频信号与所述预先缓存在内存中的视频信号不同，则将所述编码后的视频信号替换所述预先缓存在内存中的视频信号。And if the encoded video signal is different from the video signal pre-cached in the memory, replacing the encoded video signal with the video signal pre-cached in the memory. 如权利要求1所述的信号源的切换方法，其特征在于，所述获取有信号输入的信号源通道中的视频信号的步骤包括：The method for switching a signal source according to claim 1, wherein the step of acquiring a video signal in a signal source channel having a signal input comprises: 获取有信号输入的信号源通道中预设时长内的视频信号。Obtain the video signal within the preset duration in the source channel with signal input. 如权利要求5所述的信号源的切换方法，其特征在于，所述将所获取有信号输入的信号源通道中的视频信号编码缓存到内存的步骤包括：The method for switching a signal source according to claim 5, wherein the step of buffering the video signal in the signal source channel from which the signal input is obtained into the memory comprises: 将所获取有信号输入的信号源通道中的视频信号进行编码；Encoding the video signal in the source channel from which the signal is input; 判断所述编码后的视频信号与预先缓存在内存中的视频信号是否相同；Determining whether the encoded video signal is the same as a video signal pre-cached in the memory; 若所述编码后的视频信号与所述预先缓存在内存中的视频信号相同，则将所述编码后的视频信号删除，并保持所述预先缓存在内存中的视频信号；If the encoded video signal is the same as the video signal pre-cached in the memory, deleting the encoded video signal, and maintaining the video signal pre-cached in the memory; 若所述编码后的视频信号与所述预先缓存在内存中的视频信号不同，则将所述编码后的视频信号替换所述预先缓存在内存中的视频信号。And if the encoded video signal is different from the video signal pre-cached in the memory, replacing the encoded video signal with the video signal pre-cached in the memory. 如权利要求1所述的信号源的切换方法，其特征在于，所述检测指令为所述多媒体播放设备定时产生的指令或所述多媒体播放设备开机时产生的指令或信号源按键触发时产生的指令。The method for switching a signal source according to claim 1, wherein the detecting instruction is generated by an instruction generated by the multimedia playing device or when an instruction generated by the multimedia playing device is turned on or a signal source button is triggered. instruction. 一种信号源的切换装置，其特征在于，所述信号源的切换装置包括：A switching device for a signal source, characterized in that: the switching device of the signal source comprises: 检测模块，用于在侦测到检测指令时，检测多媒体播放设备的各个信号源通道是否有信号输入；The detecting module is configured to detect whether each signal source channel of the multimedia playing device has a signal input when detecting the detecting instruction; 获取模块，用于获取有信号输入的信号源通道中的视频信号；An acquisition module, configured to acquire a video signal in a signal source channel with a signal input; 缓存模块，用于将所获取有信号输入的信号源通道中的视频信号编码缓存到内存；a buffer module, configured to buffer a video signal in the source channel of the acquired signal input into the memory; 读取模块，用于在侦测到信号源切换指令时，从所述内存中读取出切换后的信号源通道对应的视频信号，并显示所述视频信号。And a reading module, configured to: when the signal source switching instruction is detected, read a video signal corresponding to the switched source channel from the memory, and display the video signal. 如权利要求8所述的信号源的切换装置，其特征在于，所述缓存模块包括：The apparatus for switching a signal source according to claim 8, wherein the cache module comprises: 编码单元，用于将所获取有信号输入的信号源通道中的视频信号进行编码；a coding unit, configured to encode a video signal in a signal source channel obtained with a signal input; 判断单元，用于判断所述编码后的视频信号与预先缓存在内存中的视频信号是否相同；a determining unit, configured to determine whether the encoded video signal is the same as a video signal that is pre-cached in the memory; 保持单元，用于在所述编码后的视频信号与所述预先缓存在内存中的视频信号相同，则将所述编码后的视频信号删除，并保持所述预先缓存在内存中的视频信号；a holding unit, configured to: after the encoded video signal is the same as the video signal pre-cached in the memory, delete the encoded video signal, and maintain the video signal pre-cached in the memory; 替换单元，用于在所述编码后的视频信号与所述预先缓存在内存中的视频信号不同，则将所述编码后的视频信号替换所述预先缓存在内存中的视频信号。And a replacing unit, configured to replace the encoded video signal with the video signal pre-cached in the memory, after the encoded video signal is different from the video signal pre-cached in the memory. 如权利要求8所述的信号源的切换装置，其特征在于，所述信号源的切换装置还包括：The apparatus for switching a signal source according to claim 8, wherein the switching means of the signal source further comprises: 标识模块，用于对有信号输入的信号源通道进行标识。An identification module for identifying a source channel having a signal input. 如权利要求10所述的信号源的切换装置，其特征在于，所述缓存模块包括：The apparatus for switching a signal source according to claim 10, wherein the cache module comprises: 编码单元，用于将所获取有信号输入的信号源通道中的视频信号进行编码；a coding unit, configured to encode a video signal in a signal source channel obtained with a signal input; 判断单元，用于判断所述编码后的视频信号与预先缓存在内存中的视频信号是否相同；a determining unit, configured to determine whether the encoded video signal is the same as a video signal that is pre-cached in the memory; 保持单元，用于在所述编码后的视频信号与所述预先缓存在内存中的视频信号相同，则将所述编码后的视频信号删除，并保持所述预先缓存在内存中的视频信号；a holding unit, configured to: after the encoded video signal is the same as the video signal pre-cached in the memory, delete the encoded video signal, and maintain the video signal pre-cached in the memory; 替换单元，用于在所述编码后的视频信号与所述预先缓存在内存中的视频信号不同，则将所述编码后的视频信号替换所述预先缓存在内存中的视频信号。And a replacing unit, configured to replace the encoded video signal with the video signal pre-cached in the memory, after the encoded video signal is different from the video signal pre-cached in the memory. 如权利要求8所述的信号源的切换装置，其特征在于，所述获取模块还用于获取有信号输入的信号源通道中预设时长内的视频信号。The apparatus for switching a signal source according to claim 8, wherein the acquisition module is further configured to acquire a video signal within a preset duration of a signal source channel having a signal input. 如权利要求12所述的信号源的切换装置，其特征在于，所述缓存模块包括：The apparatus for switching a signal source according to claim 12, wherein the cache module comprises: 编码单元，用于将所获取有信号输入的信号源通道中的视频信号进行编码；a coding unit, configured to encode a video signal in a signal source channel obtained with a signal input; 判断单元，用于判断所述编码后的视频信号与预先缓存在内存中的视频信号是否相同；a determining unit, configured to determine whether the encoded video signal is the same as a video signal that is pre-cached in the memory; 保持单元，用于在所述编码后的视频信号与所述预先缓存在内存中的视频信号相同，则将所述编码后的视频信号删除，并保持所述预先缓存在内存中的视频信号；a holding unit, configured to: after the encoded video signal is the same as the video signal pre-cached in the memory, delete the encoded video signal, and maintain the video signal pre-cached in the memory; 替换单元，用于在所述编码后的视频信号与所述预先缓存在内存中的视频信号不同，则将所述编码后的视频信号替换所述预先缓存在内存中的视频信号。And a replacing unit, configured to replace the encoded video signal with the video signal pre-cached in the memory, after the encoded video signal is different from the video signal pre-cached in the memory. 如权利要求8所述的信号源的切换装置，其特征在于，所述检测指令为所述多媒体播放设备定时产生的指令或所述多媒体播放设备开机时产生的指令或信号源按键触发时产生的指令。The apparatus for switching a signal source according to claim 8, wherein the detection command is generated by an instruction generated by the multimedia playback device or when an instruction generated by the multimedia playback device is turned on or a signal source button is triggered. instruction.
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