[go: up one dir, main page]

WO2006003557A1 - Procede de decodage d'un service teletexte - Google Patents

Procede de decodage d'un service teletexte Download PDF

Info

Publication number
WO2006003557A1
WO2006003557A1 PCT/IB2005/052061 IB2005052061W WO2006003557A1 WO 2006003557 A1 WO2006003557 A1 WO 2006003557A1 IB 2005052061 W IB2005052061 W IB 2005052061W WO 2006003557 A1 WO2006003557 A1 WO 2006003557A1
Authority
WO
WIPO (PCT)
Prior art keywords
page
contents
instance
broadcast
teletext
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/IB2005/052061
Other languages
English (en)
Inventor
Rajendra S. Sisodia
Herman J. R. Schmitz
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.)
Koninklijke Philips NV
Original Assignee
Koninklijke Philips Electronics NV
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 Koninklijke Philips Electronics NV filed Critical Koninklijke Philips Electronics NV
Publication of WO2006003557A1 publication Critical patent/WO2006003557A1/fr
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
    • H04N21/47—End-user applications
    • H04N21/488—Data services, e.g. news ticker
    • H04N21/4888—Data services, e.g. news ticker for displaying teletext characters
    • 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
    • H04N21/434—Disassembling of a multiplex stream, e.g. demultiplexing audio and video streams, extraction of additional data from a video stream; Remultiplexing of multiplex streams; Extraction or processing of SI; Disassembling of packetised elementary stream
    • H04N21/4348—Demultiplexing of additional data and video streams
    • H04N21/4349—Demultiplexing of additional data and video streams by extracting from data carousels, e.g. extraction of software modules from a DVB carousel
    • 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
    • H04N21/45—Management operations performed by the client for facilitating the reception of or the interaction with the content or administrating data related to the end-user or to the client device itself, e.g. learning user preferences for recommending movies, resolving scheduling conflicts
    • H04N21/4508—Management of client data or end-user data
    • H04N21/4532—Management of client data or end-user data involving end-user characteristics, e.g. viewer profile, preferences
    • 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
    • H04N21/47—End-user applications
    • 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
    • H04N21/47—End-user applications
    • H04N21/475—End-user interface for inputting end-user data, e.g. personal identification number [PIN], preference data
    • H04N21/4755—End-user interface for inputting end-user data, e.g. personal identification number [PIN], preference data for defining user preferences, e.g. favourite actors or genre
    • 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]
    • H04N21/80—Generation or processing of content or additional data by content creator independently of the distribution process; Content per se
    • H04N21/83—Generation or processing of protective or descriptive data associated with content; Content structuring
    • H04N21/84—Generation or processing of descriptive data, e.g. content descriptors
    • H04N21/8405—Generation or processing of descriptive data, e.g. content descriptors represented by keywords
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N7/00—Television systems
    • H04N7/08—Systems for the simultaneous or sequential transmission of more than one television signal, e.g. additional information signals, the signals occupying wholly or partially the same frequency band, e.g. by time division
    • H04N7/087—Systems for the simultaneous or sequential transmission of more than one television signal, e.g. additional information signals, the signals occupying wholly or partially the same frequency band, e.g. by time division with signal insertion during the vertical blanking interval only
    • H04N7/088—Systems for the simultaneous or sequential transmission of more than one television signal, e.g. additional information signals, the signals occupying wholly or partially the same frequency band, e.g. by time division with signal insertion during the vertical blanking interval only the inserted signal being digital
    • H04N7/0882—Systems for the simultaneous or sequential transmission of more than one television signal, e.g. additional information signals, the signals occupying wholly or partially the same frequency band, e.g. by time division with signal insertion during the vertical blanking interval only the inserted signal being digital for the transmission of character code signals, e.g. for teletext

Definitions

  • the invention relates to a method of decoding a teletext service broadcast to a receiver and structured in pages, including: acquiring at least a part of a page's contents as broadcast at a first instance and acquiring at least a part of the page's contents as broadcast at a second instance.
  • the invention also relates to a system for decoding a teletext service broadcast to a receiver and structured in pages, including at least one module arranged to acquire at least a part of a page's contents, and at least one module for generating a signal for displaying a displayable part of a teletext page, wherein the system is configured to acquire at least a part of a page's contents as broadcast at a first instance and at least a part of the page's contents as broadcast at a subsequent instance.
  • the invention also relates to a broadcast receiver, for example a television set.
  • the invention also relates to a computer program for controlling a teletext decoder.
  • the known television receiver includes a teletext decoder for receiving and displaying teletext page for signalling that a requested teletext has been changed or not changed with respect to the previous consultation of the relevant page. If a requested page has exactly the same contents upon reception as the previously consulted page of the same page number, an On-Screen-Display message is generated. In this message the user is notified of the fact that he has already seen the page before. If a requested page has a different content upon reception than the previously consulted page of the same page number, the page is displayed.
  • a problem of the known method is that it requires an on-screen-display generator to generate a separate signal and a separate command to be issued in order to view the page.
  • the time between page request and display is increased and a more complicated broadcast receiver is required, due to the relatively complicated way in which alterations are brought to the attention of the user.
  • the method according to the invention is characterised by identifying sections of a displayable part, common to the acquired parts, of the contents of the page differing between the first and the second instance, and generating a signal for displaying at least the displayable part in such a manner that the identified sections are displayed in a distinctive manner.
  • the generated signal is suitable for displaying the changed contents of a page on a Visual Display Unit. Because the or each section is displayed in a distinctive manner, the user is alerted to changed contents. However, no prior interruption of the page selection process is necessary. An additional advantage is that the method is more informative. Because the sections are identified and displayed in a distinctive manner, the page need not be displayed so long, because the user will generally only want to gain knowledge of the changed sections. It is observed that a method of decoding teletext data broadcast to a receiver and structured in pages is also known from Siu, Y.K., Chan, CK. and Ho, K.L., "Rebroadcasting of real-time teletext data", /EEE transactions on Consumer Electronics, 22 (2), May 1993, pp.
  • That paper describes the design, implementation and performance analysis of a financial rebroadcasting system suitable for consumer use. It is capable of extracting real time financial data from a high speed full channel teletext data source and rebroadcasting it through the slow data rate telephone network.
  • a PC AT based server is equipped with a teletext decoder. The server stores all available pages in the local memory. The database is regularly updated should there be changes in the teletext page. During normal operation, only new or changed data will be compressed and broadcast to the end user through the telephone network.
  • the receiving software will decode and process the serial data and then update its database for possible retrieval.
  • a signal for displaying at least the displayable part of the page in such a manner that the identified sections are displayed in a distinctive manner is not generated.
  • the step of identifying sections differing between the first and second instance is preceded by a step of determining whether the contents of the page have changed between the first and second instance, and the step of identifying sections differing between the first and second instance is carried out conditional upon detecting that the contents of the page have changed.
  • This embodiment is suitable for use when a teletext service with multiple pages with contents varying at different rates is broadcast. It is also suitable for decreasing the processing load on the system carrying out the method, when the rate of updates to a specific page varies.
  • the step of detecting a change in contents of the page includes deriving a characteristic from at least the contents of the page as broadcast at the second instance.
  • the characteristic is thus derived by decoding the data in the teletext signal to analyse the contents.
  • the characteristic may be derived by a calculation using the contents as input. An example would be the calculation of a digest of the displayable part of the contents.
  • the characteristic could also be a flag in one of the (non-displayable) packets of the page.
  • a change in contents of the page is detected by detecting arrival at the receiver of a unit of teletext data encoding a section of a page of which the contents have changed relative to the section as broadcast at a previous instance.
  • At least the step of identifying sections differing between the first and second instance is preceded by a step of receiving instructions from a user input device, including a representation of a page address, selecting at least a part of the page for display, by a step of storing data representative of the contents of at least a part of the selected part in memory, and by a step of generating a signal for displaying the selected part a first time, wherein the page's contents as broadcast at the first instance are taken from the stored data.
  • the part of a page's contents as broadcast at a first instance is stored in memory and the step of generating a signal for displaying at least the display able part of the page includes combining only the identified sections of the page's contents as broadcast at a second instance with a remainder of the displayable part of the page's contents as broadcast at the first instance, wherein the remainder is retrieved from memory.
  • the displayable part constitutes a part smaller than the totality of displayable contents of the page and the method includes retrieving selection criteria and selecting the displayable part for identifying the differing sections in accordance with the retrieved selection criteria.
  • the effect is that the data size of the contents within which the differing sections are to be identified is smaller. Processing is thus simplified.
  • An additional effect is that the criteria can be adapted so as to highlight only a few types of displayable content. Thus, highlighting of a field showing the date and/or current time can be avoided.
  • a favourable variant of this embodiment includes receiving instructions representative of the selection criteria from a user input device and storing the instructions in memory for retrieval.
  • the effect is that only sections of interest to the user are identified. This again reduces the amount of data processing, as less of the contents have to be analysed to identify differing sections. Additionally, a more informative display can be generated from the signal for displaying the identified differing sections in a distinctive manner.
  • the system for decoding teletext data is characterised in that the system further comprises at least one module adapted to identify sections of a displayable part of the contents of the page differing between the first and the second instance, and in that the system is configured to generate a signal for displaying the displayable part of the page in such a manner that the identified sections are displayed in a distinctive manner.
  • a module may be formed by a plurality of co-operating discrete devices or device components.
  • the above-defined system provides an informative display of the contents of a page with dynamically changing contents. It allows a viewer to be made aware of updates in an effective manner.
  • the invention provides a broadcast receiver, for example a television set, provided with a system according to the invention.
  • the broadcast receiver is equipped with the tuning and demodulation functions to receive the broadcast teletext data. It is provided with the functionality providing the above-mentioned advantages of the system for decoding the teletext data according to the invention.
  • a computer program for controlling a teletext decoder adapted, when run on a programmable processing device, to enable the system including the programmable processing device and the teletext decoder to carry out a method according to the invention.
  • the computer may be a processor integrated with the teletext decoder on a single chip, or it may be a processor providing instructions for controlling a teletext decoder chip via a bus, for instance.
  • the teletext decoder is adapted to provide the above- mentioned effects of the method according to the invention.
  • the figure represents components of a television set 1 as an example of a broadcast receiver for implementing the invention. It is observed that the methods presented in the following could also be carried out in a separate data processing device arranged to receive the contents of teletext page broadcast to a dedicated receiver device. Such a data processing device would acquire a certain page's contents from the receiver device in the form of a data file containing character codes. The exact format of the data encoding the page's contents need not be the same as broadcast and received by the broadcast receiver in this, or in any other embodiment of the method.
  • a radio-frequency signal is received at an input 2 of the television set 1.
  • the received signal passes through an RF amplifier 3 to a tuning circuit 4.
  • the tuning circuit 4 tunes to a specific carrier frequency, associated with a television channel.
  • the output signal of the tuning circuit 4 is passed to a demodulation circuit 5.
  • the demodulation circuit 5 separates video, audio and teletext components from the carrier signal.
  • a colour decoder 6 retrieves and processes the video component.
  • a teletext data acquisition circuit 7 retrieves teletext page data. It is noted that the method as presented herein is not limited to a particular kind of broadcast. In the present example, a signal carrying the data of the teletext service is carried in the vertical blanking interval of an analogue television broadcast signal.
  • the teletext service is, for example, broadcast in a separate MPEG transport stream by satellite, or through a cable network link.
  • the teletext service is broadcast in MPEG packets carried in (Internet Protocol) IP packets.
  • the present example will focus on teletext services broadcast in the vertical blanking interval of an analogue television transmission, for example in accordance with European Telecommunication Standard (ETS) 300 706.
  • Teletext data packets according to the above-mentioned standard each comprise forty- five bytes of data, of which the fourth and fifth byte define the packet address. The first part of the packet address encodes a magazine number, the second part a packet number.
  • Packets with number zero are referred to as page headers. Packets with packet numbers one to twenty- five are normal packets, intended for direct display. Packets with numbers twenty-six to thirty-one are non-displayable packets. Following a page header packet, all subsequent packets up to a next page header packet in the same magazine relate to the same page.
  • the page header packet comprises a page address, consisting of a page number and a page sub-code. In this manner, each packet in the service 'belongs' to a page, i.e. the service is structured in pages. A teletext service is broadcast in a carrousel.
  • the contents of a certain page or sub-page can be updated.
  • Some pages have extremely dynamically varying contents, so that different data is broadcast under a certain page address at each instance of broadcasting packets addressable under that address.
  • Other pages are relatively static, meaning that the same contents are broadcast every time packets of a certain page address are broadcast.
  • the television set 1 shown as an example is controlled by a microcontroller 8, which executes instructions stored in a Read Only Memory (ROM) 9 of a known type. These instructions control the operation of the television set so that the entire system is adapted to execute an embodiment of the method as set out in the present application.
  • the microcontroller 8 further has access to a non- volatile memory 10, for storing data that must not be erased when the television set's power is turned off. Commands and data are transferred between the microcontroller 8 and the various components operating under its control via a bus 11, for example an I 2 C bus.
  • a user of the television set enters commands via a remote control unit 12, which exchanges data with a remote control interface circuit 13.
  • the commands are passed to the microcontroller 8 via the bus 11.
  • One command the viewer may enter is a command to change channels. This command results in a command from the microcontroller 8 to the tuner 4 directing it to tune to a different frequency.
  • the output of the colour decoder 6 is passed to a multiplexer 14, which passes it unaltered to a video amplifier 15 driving a video display unit 16.
  • the latter may be a cathode ray tube or a plasma display for instance.
  • a display section 17 decoding teletext page data loaded into a teletext memory 18.
  • the output generated by the display section is used by the multiplexer 14 to replace part (in the case of subtitles) or all of the video signal provided by the colour decoder 7.
  • the display section 17 is thus one type of module for generating a signal for displaying a displayable part of the contents of a teletext page.
  • the signal is formed by the driving signals for the video display unit 16.
  • the module is a module for generating an analogue or digital video signal for transmission over a cable connection to a separate display device, for example a VGA or DVI signal.
  • the signal is a modified set of teletext characters, in which the display format of certain characters or page elements has been changed by means of a method as set out below.
  • teletext page data is transmitted in a carrousel, implying that a certain amount of time elapses between the receipt of teletext page data encoding a first page and that encoding a further page. Even more time may pass between receipt of a particular page's contents as broadcast at a first instance and the same page's contents as updated and broadcast at a second instance.
  • the television system comprises a teletext data cache 19. If a request for a specific page is received through the remote control interface circuit 13, the teletext data cache 19 is searched for the page. If it is found, it is transferred to the teletext memory 18. If not, the teletext page data encoding the requested page will have to be provided from the teletext data acquisition circuit 7, as soon as it has been provided by the tuning circuit 4 and demodulation circuit 5.
  • identification of sections of a selected page differing between a first and subsequent instance of broadcast may involve a relatively lengthy analysis of the page's contents.
  • the step of identifying sections differing between the first and second instance of broadcast is preferably preceded by a step of determining whether the contents of the page have changed at all between the first and second instance. Execution of the identification step is then only carried out if a change is detected.
  • the television set is configured to receive and decode a special variant of teletext service. In this variant, contents of specific pages are updated dynamically by the provider of the teletext service.
  • the teletext data is broadcast in order of page number, but rapidly varying fields within certain pages are transmitted more often in a specific data format and interleaved with the data broadcast in normal order. This may be done by inserting the page sections concerned into so-called extension packets belonging to a page with a different page address.
  • the page address of the page to which the page section actually belongs in terms of its contents is included in the data following the packet number of the extension packet.
  • Information allowing it to be correctly positioned within the page is also included. This information advantageously includes a reference to a keyword, rather than a particular screen position.
  • the remainder of the page that is transmitted in the normal order then also includes a tag with a corresponding keyword allowing identification of the position of the field with rapidly varying contents. This facilitates combination of the updated section with the (static) remainder of the page.
  • a priority indication is preferably included in the extension packet to ensure that the contents of the extension packet are acquired and decoded before packets belonging to pages with static contents.
  • the teletext data acquisition circuit 7 acquires the extension packet.
  • the contents of the differing page section are retrieved from the acquired packet and combined with the remainder of the displayable part of the page as stored in the teletext data cache 19 or teletext memory 18. Thus, it is not necessary to acquire all the packets of the page when only the contents of a specific section have changed.
  • Receipt and subsequent retrieval of the differing page section also serve as a trigger, enabling detection of a change in contents of the page.
  • the identification of the differing page sections merely includes decoding the contents of the extension packet(s) carrying the update.
  • detection and identification of differing sections of the contents of a page or sub-page will be carried out by comparison of cached information representative of a part of the page's contents as broadcast and received at a first instance of broadcast with the subsequently broadcast and received version.
  • a fast manner of detection is disclosed in US 5,729,298. This method is suitable for quickly determining the necessity of actually comparing the encoded contents of the two versions of the displayable part of the page.
  • a checkword is derived from the displayable contents of the page as broadcast at a first and at a second instance. Different checkwords are indicative of a change in contents.
  • a teletext service provider may also include a flag in the packets belonging to a page of which the contents have changed relative to a previous instance of broadcasting.
  • the television set will then preferably use this flag as an even faster method of detecting a change in the contents of a certain page in the teletext service.
  • Other detection methods are conceivable.
  • sections of a selected, displayable, part of the contents of a page that differ relative to the last instance of broadcast and receipt of the page, or of the section concerned, are identified and displayed in a distinctive manner.
  • This variant is easily and efficiently implemented, since the last received contents of the page are generally available in the teletext data cache 19 anyway. This variant thus requires little or no additional memory. It also leads to the identification of a limited number of page sections, since the number of changes between subsequent instances of broadcast is relatively small.
  • the contents of a displayable part of a selected page are compared with the contents of the selected page as selected and viewed on a previous occasion by means of the television set.
  • instructions are received through the remote control interface unit 13.
  • the instructions include a representation of a page address, by which the page or a sub-page is selected for display.
  • Data representative of at least a part of the page or sub-page is stored in memory. This part generally includes at least the part displayed on the video display unit 16.
  • the teletext service in which tagged page section updates are transmitted, only the value of the changing field at the time of display need be stored specially, as the remainder of the page is cached anyway. Thus, little additional storage capacity is required.
  • the part of a selected page's contents that is included in the comparison with a previously broadcast version is generally smaller than the totality of the page's displayable contents.
  • the television set 1 may include a utility for personalising the display of the contents of a teletext page. This is of special advantage where rapidly varying sections are transmitted with a tag including a keyword. Sections in tags including keywords corresponding to a user's preset criteria are compared with a view to detecting and identifying changes, whereas others are not processed. Similar mechanisms may be used to allow a user to enter a particular page location as a criterion, for example a certain line in a page containing a table or Scoreboard. In that case, the broadcast contents need not be tagged.
  • module refers generally to a functional unit, which may be implemented in one or a combination of pieces of hardware, conceivably augmented by software.

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Databases & Information Systems (AREA)
  • Human Computer Interaction (AREA)
  • Television Systems (AREA)

Abstract

L'invention concerne un procédé de décodage d'un service télétexte diffusé vers un récepteur (1) et structuré en pages, qui consiste à acquérir au moins une partie des contenus d'une page tels que diffusés au niveau d'une première instance ; et à acquérir au moins une partie des contenus de la page tels que diffusés au niveau d'une deuxième instance. Ledit procédé consiste en outre à identifier des sections d'une partie pouvant être affichée, commune aux parties acquises, des contenus de la page qui diffèrent de la première à la deuxième instance ; et à générer un signal pour afficher au moins une partie pouvant être affichée de façon que les sections identifiées soient affichées de manière distinctive.
PCT/IB2005/052061 2004-06-28 2005-06-23 Procede de decodage d'un service teletexte Ceased WO2006003557A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
EP04102992 2004-06-28
EP04102992.7 2004-06-28

Publications (1)

Publication Number Publication Date
WO2006003557A1 true WO2006003557A1 (fr) 2006-01-12

Family

ID=34975225

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/IB2005/052061 Ceased WO2006003557A1 (fr) 2004-06-28 2005-06-23 Procede de decodage d'un service teletexte

Country Status (1)

Country Link
WO (1) WO2006003557A1 (fr)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH07212329A (ja) * 1994-01-20 1995-08-11 Fujitsu General Ltd 在宅投票システム
EP0808063A1 (fr) * 1996-05-15 1997-11-19 Matsushita Electric Industrial Co., Ltd. Méthode et appareil pour la réception de télétexte
US5729298A (en) * 1993-02-01 1998-03-17 U.S. Philips Corporation Teletext decoder with page update indication

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5729298A (en) * 1993-02-01 1998-03-17 U.S. Philips Corporation Teletext decoder with page update indication
JPH07212329A (ja) * 1994-01-20 1995-08-11 Fujitsu General Ltd 在宅投票システム
EP0808063A1 (fr) * 1996-05-15 1997-11-19 Matsushita Electric Industrial Co., Ltd. Méthode et appareil pour la réception de télétexte

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 1995, no. 11 26 December 1995 (1995-12-26) *

Similar Documents

Publication Publication Date Title
US8418203B1 (en) Transmission method and receiving device of program guide information including a control signal
US6763522B1 (en) System and method for a digital television electronic program guide
EP2165533B1 (fr) Procédé d'affichage d'information de télévision sur l'internet de récepteur de diffusion et récepteur de diffusion permettant la mise en uvre du procédé
KR100562384B1 (ko) 전자 메시지 내의 용어를 프로그램 정보와 링크하기 위한 방법 및 인터페이스
JP5066561B2 (ja) 視聴者ターミナルへ広告メッセージを選択的に供給するための方法及び装置
US20030018980A1 (en) Method and apparatus for selective recording of television programs using event notifications
JP4662628B2 (ja) 伝送システム
US8645983B2 (en) System and method for audible channel announce
US20080066105A1 (en) Method for automatically searching for data applications for all channels and video apparatus adopting the method
US20020056104A1 (en) Folder-style program guide with categories and sub-categories
US20120301110A1 (en) Image processing apparatus method and computer program product
US7941820B2 (en) Method and apparatus for updating program guide information of digital TV
JP3439326B2 (ja) 放送受信装置
KR101325846B1 (ko) Ｅｐｇ 검색장치 및 방법
WO2006003557A1 (fr) Procede de decodage d'un service teletexte
CN1794819B (zh) 用于在数字广播接收机中处理文本的装置及其方法
CN108989876B (zh) 一种字幕显示的方法及装置
US20030086408A1 (en) Television receiver arrangement and method of effecting a channel switch in a television receiver
US7966639B2 (en) Digital broadcast receiver and digital broadcast content processing method
KR100338216B1 (ko) 프로그램장르표시방법및장치
KR100304884B1 (ko) 프로그램안내정보의화면표시장치및방법
US20020047941A1 (en) TV signal receiver
JP2001257649A (ja) 放送受信装置
KR20060030497A (ko) 디지털 방송 신호로 제공되는 소프트웨어 코드를 검색하여저장하는 방법
US20070013810A1 (en) Control of a system for access to teletext information

Legal Events

Date Code Title Description
AK Designated states

Kind code of ref document: A1

Designated state(s): AE AG AL AM AT AU AZ BA BB BG BR BW BY BZ CA CH CN CO CR CU CZ DE DK DM DZ EC EE EG ES FI GB GD GE GH GM HR HU ID IL IN IS JP KE KG KM KP KR KZ LC LK LR LS LT LU LV MA MD MG MK MN MW MX MZ NA NG NI NO NZ OM PG PH PL PT RO RU SC SD SE SG SK SL SM SY TJ TM TN TR TT TZ UA UG US UZ VC VN YU ZA ZM ZW

AL Designated countries for regional patents

Kind code of ref document: A1

Designated state(s): GM KE LS MW MZ NA SD SL SZ TZ UG ZM ZW AM AZ BY KG KZ MD RU TJ TM AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LT LU MC NL PL PT RO SE SI SK TR BF BJ CF CG CI CM GA GN GQ GW ML MR NE SN TD TG

NENP Non-entry into the national phase

Ref country code: DE

WWW Wipo information: withdrawn in national office

Country of ref document: DE

122 Ep: pct application non-entry in european phase