WO2004107754A1 - Commande d'un systeme permettant d'avoir acces a des informations de teletexte - Google Patents

Commande d'un systeme permettant d'avoir acces a des informations de teletexte Download PDF

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Publication number
WO2004107754A1
WO2004107754A1 PCT/IB2004/050719 IB2004050719W WO2004107754A1 WO 2004107754 A1 WO2004107754 A1 WO 2004107754A1 IB 2004050719 W IB2004050719 W IB 2004050719W WO 2004107754 A1 WO2004107754 A1 WO 2004107754A1
Authority
WO
WIPO (PCT)
Prior art keywords
teletext
signal
information
data
identification information
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/IB2004/050719
Other languages
English (en)
Inventor
Louis P. M. Schreurs
Song K. Lim
Andrew H. W. Toh
Ah K. Lim
Suresh B. Kunhutty Vasudevan
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
Priority to US10/558,487 priority Critical patent/US20070013810A1/en
Priority to EP04785575A priority patent/EP1634446A1/fr
Priority to JP2006530871A priority patent/JP2007504780A/ja
Publication of WO2004107754A1 publication Critical patent/WO2004107754A1/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
    • 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
    • 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
    • H04N7/0888—Subscription systems therefor

Definitions

  • the invention relates to a method of controlling a system for providing access to teletext information, which system comprises, an input for receiving a source signal, a channel selection system for selecting a program channel signal carried by the source signal and including embedded teletext data belonging to a teletext service, a teletext decoder for decoding teletext data embedded in a selected program channel signal, a coder for converting decoded teletext data into a video signal for displaying teletext information on a display device, memory for storing pre-set data including information identifying at least one pre-set program channel signal, an interface for receiving a switch command entered by a user, wherein the method comprises receiving a switch command through the interface.
  • the invention further relates to a system for providing access to teletext information, comprising, an input for receiving a source signal, a channel selection system for selecting a program channel signal carried by the source signal and including embedded teletext data belonging to a teletext service, a teletext decoder for decoding teletext data embedded in a selected program channel signal, a coder for converting decoded teletext data into a video signal for displaying teletext information on a display device, memory for storing pre-set data including information identifying at least one pre-set program channel signal, an interface for receiving a switch command entered by a user, and a controller for controlling the operation of the system, wherein the system is adapted to decode teletext data embedded in the pre-set program channel signal upon receipt of the switch command.
  • the invention also relates to video apparatus comprising such a system and to a computer program product.
  • Examples of a method and system as defined above are known, for example from JP-A-06-030386.
  • This publication discloses a teletext receiver in which a microcomputer generates a table representing a cross reference between four colour keys, a program position (channel) and a page in a storage means. When any of the four colour keys is depressed, a program position and page data corresponding to the depressed colour key are read from the table of the storage means and stored in a RAM of the microcomputer. Then the data of the program position are in use to control channel selection of a tuner. Then page data are fed to a character signal processor to set a page and to automatically receive a teletext program. The content is displayed on a CRT (Cathode Ray Tube).
  • CTR Cathode Ray Tube
  • the method according to the invention is characterised by, in response to the switch command, searching at least a part of decoded teletext data embedded in the pre-set program channel signal for identification information identifying a teletext information provider and directing the system to convert at least part of the decoded teletext data into a video signal if identification information is found corresponding to pre-set identification information included in the pre-set data.
  • the identification information identifies proprietary information, i.e. information owned by a private individual or corporation and kept up to date for the benefit of a certain audience.
  • proprietary information i.e. information owned by a private individual or corporation and kept up to date for the benefit of a certain audience.
  • the pre-set identification information singles out that certain audience. If proprietary information is currently available for that audience, it is provided to them if they provide the switch command.
  • the method comprises, if no corresponding identification information is found, directing the channel selection system to select at least one further preset program channel signal including embedded teletext data, and searching at least a part of the teletext data embedded in each further program channel signal for identification information identifying a teletext information provider and directing the system to decode and convert at least part of the teletext data into a video signal if identification information is found corresponding to the pre-set identification information.
  • providers of proprietary information are not limited to one channel.
  • the users of the system controlled by means of this embodiment of the method can be provided with access to a selected number of different sources of proprietary information.
  • a preferred variant of this embodiment comprises comprising, if identification information is found in teletext data embedded in a further program channel signal, storing information identifying the further program channel signal as starting channel information, and preferably, in response to a second switch command, directing the channel selection system to first select the program channel signal identified by the starting channel information, searching at least a part of the teletext data embedded in the identified program channel signal for identification information identifying a teletext information provider and directing the system to decode and convert at least part of the teletext data into a video signal if identification information is found corresponding to the pre-set identification information.
  • the method comprises, upon receipt of the switch signal, directing the system to provide the source signal carrying the pre-set program signal to the channel selection system.
  • a preferred embodiment comprises directing the system to decode and convert into a video signal teletext data encoding a range of at least one teletext page, in accordance with pre-set page identification data stored in memory.
  • the proprietary information can be reserved for a number of dedicated pages within the teletext service.
  • this embodiment has the advantage that it is not necessary to provide each of the pages containing the proprietary data with the identification information. Instead, separately transmitted identification information indicates to the system that pages containing updated proprietary information are present within the pre-set range.
  • the system according to the invention is characterised in that the system is adapted to be controlled by the controller by means of a method according to the invention.
  • video apparatus comprising a system according to the invention.
  • a computer program product that, when running on a computing device, is capable of enabling the computer device to carry out a method according to the invention.
  • FIG. 1 gives a schematic overview at a component level of a system for providing access to teletext information operating in accordance with the invention
  • Fig. 2 is a flow chart of an embodiment of a method implementing the invention
  • Fig. 3 shows schematically some examples of apparatus employing the invention.
  • FIG. 1 Two examples of video apparatus that could comprise the system of the invention are given in Fig. 1.
  • a DVD (Digital Versatile Disk)-recorder 1 is connected to a television set 2 by means of an analogue video link.
  • Another suitable piece of video apparatus would be a set-top box.
  • the system for providing access to teletext information need not be comprised in one discrete piece of apparatus, but could comprise distributed components.
  • An example of such an implementation is a personal computer with a separate (possibly external) television tuner connected to a separate board in the computer, with a teletext decoder chip being fitted to the board, or with a software teletext decoder being installed on the computer.
  • this system could be controlled by software running on the personal computer and directing the operation of each of the aforementioned components making up the system for providing access to teletext information.
  • the television set 2 is controlled by the user by means of a remote control unit 3. Although not necessary for the invention, it will be assumed herein that the television set 2 is a digital television set. An example of a reference design for a digital television is given in Fig. 2.
  • the digital television set 2 comprises an input 4 for a digital television signal, provided, for example by means of a cable, satellite or terrestrial digital broadcast.
  • the signal may conform to the ATSC or DVB standards, for example.
  • a tuner 5 is used to tune to a broadcast signal of a certain carrier frequency and to extract an MPEG transport stream.
  • the MPEG transport stream is a multiplex of a number of elementary streams, of which a number form a program channel signal.
  • the digital television set 2 can also accept an analogue video signal from another source, for example a video recorder or an analogue television tuner, through an analogue input 6.
  • the analogue signal is passed to a video decoder 7, capable of handling video in one or more of the known analogue video formats, e.g. PAL, NTSC or SEC AM.
  • a home entertainment engine 8 processes the incoming transport stream signals or converted analogue video signals. In addition, the home entertainment engine 8 controls the operation of the various components of the system. Where the incoming MPEG transport stream comprises a number of program channel signals, it also selects the appropriate one by de-multiplexing the transport stream.
  • the home entertainment engine further comprises a teletext decoder for decoding teletext data embedded in a program channel signal, i.e. in the signal received from the video decoder 7 or comprised in an elementary stream of a bouquet of streams forming a program channel signal and received from the tuner 5.
  • the home entertainment engine 8 is connected to random access memory (RAM) 9 through a dedicated interface and to a system bus 10 through another interface. Also connected to the system bus 10 is an interface unit 11 , for accepting and converting commands entered by the user by means of the remote control unit 3 (Fig. 1).
  • the home entertainment engine provides an output signal to a video encoder 12, which converts the output signal into a video signal in a format suitable for a display device. This may be an RGB-composite signal for the cathode ray tube of the television set 2.
  • the term video signal can refer to an MPEG-2 signal for a computer attached to a monitor, for example. Audio signals are provided by means of an audio encoder 13.
  • the home entertainment engine may have access to other memory devices than the RAM 9, for example an EEPROM 14, through the system bus 10.
  • a viewer can watch a program on the television set 2, or a general teletext page, and switch to receiving proprietary information by entering a single switch command.
  • the command is entered by pressing one single dedicated key 15 on the remote control unit 3.
  • proprietary information means information targeted at a specific part of the audience, for example subscribers.
  • One convenient example concerns the provision of up-to-date coverage of sports matches, such as games of cricket. Whilst watching another program, for example a film, the subscribers to the proprietary information can switch to receiving an updated score by pressing just the one dedicated key 15.
  • the switch command is passed by the interface unit 1 1 to the home entertainment engine 8 through the system bus 10.
  • the home entertainment engine executes an algorithm shown schematically in Fig. 3.
  • the home entertainment engine 8 After receiving the switch command at step 16, the home entertainment engine 8 consults pre-set data stored in the EEPROM 14.
  • the pre-set data includes an entry comprising information identifying a program channel signal, a range of one or more pages on which proprietary information is being transmitted and identification information uniquely identifying the provider of the proprietary information.
  • a video is being viewed when the switch command is issued, the system will first be directed to switch to receiving a source signal from the digital input 4, rather than the analogue input 6. Then, the tuner 5 will be directed to tune to the correct MPEG transport stream and the home entertainment engine will ensure that the de-multiplexing mechanism it contains extracts the program elementary streams belonging to the pre-set program channel. These streams form a program channel signal from which embedded teletext data is extracted and decoded. Thus, a first pre-set channel is selected in step 17. It is noted that if the proprietary information retrieval facility is being used for the first time, the first pre-set channel may simply be the channel that is selected when a key marked ' 1 ' on the remote control unit 3 is pressed.
  • the first pre-set channel is preferably the channel on which the proprietary information has previously been found.
  • the first pre-set channel may have been specially programmed by the user of the digital television set 2, or factory-programmed.
  • the home entertainment engine receives part of the decoded teletext data and searches it for identification information corresponding to the pre-set identification information stored in the EEPROM 14.
  • the identification may be included in the headers for the pages identified in the pre-set data.
  • the identification may be a code in a dedicated packet independent of a particular page, such as packet 8/30 as defined by
  • European Telecommunication Standard ETS 300 707. The latter variant has the advantage that the data in the pages is limited to the proprietary information.
  • the home entertainment engine 8 consults the pre-set data stored in the EEPROM 14 to retrieve the information identifying a range of one or more teletext pages in which the proprietary information has been inserted.
  • the teletext decoder is directed to decode these pages.
  • the decoded teletext information is provided to the video encoder 12, for output on the screen of the television set 2, in step 19.
  • the proprietary information is included in pages outside the range normally accessible. This means that the pages containing proprietary information will be in the hexadecimal range, e.g. 10A-10E, 20A-200E, 30A-30E, since the keys on the remote control unit only allow to enter numbers in the range 100-109, for example.
  • the home entertainment engine will direct the tuner 5 and de-multiplexing mechanism to select a further pre-set channel program signal in step 20, and repeat step 18. If all pre-set channels have been searched, the algorithm proceeds to step 21, in which the channel being watched before the switch command was received is displayed again. This marks the end of the algorithm.
  • step 20 if proprietary information is found on a channel selected in step 20, information identifying this channel is stored.
  • the channel identified by this information will be selected first in step 17.
  • step 19 the user may press a further key, for example an 'up' or 'down' key, to select a further pre-set channel, which is then searched in a step similar to step 18.
  • a further key for example an 'up' or 'down' key

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  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Television Systems (AREA)
  • Two-Way Televisions, Distribution Of Moving Picture Or The Like (AREA)

Abstract

L'invention porte sur une commande d'un système permettant d'avoir accès à des informations de télétexte et qui comprend les éléments suivants: une entrée permettant de recevoir un signal source, un système de sélection de chaîne permettant de sélectionner un signal de chaîne de programme porté par le signal source et comprenant des données de télétexte imbriquées appartenant un service de télétexte, un décodeur de télétexte permettant de décoder des données de télétexte imbriquées dans un signal de chaîne de programme sélectionné, un codeur permettant de convertir des données de télétexte décodées en signal vidéo permettant d'afficher des informations de télétexte sur un dispositif d'affichage, une mémoire permettant d'enregistrer des données préconfigurées comprenant des informations identifiant au moins un signal de chaîne de programme préconfiguré, une interface permettant de recevoir une commande de commutation introduite par un utilisateur et qui consiste à recevoir une commande de commutation à travers l'interface. Le procédé consiste en outre à rechercher, en réponse à une commande de commutation, au moins une partie des données de télétexte décodées imbriquées dans le signal de chaîne de programme préconfiguré pour des informations d'identification permettant d'identifier un fournisseur d'information de télétexte et d'amener le système à convertir au moins une partie des données de télétexte décodées en signal vidéo si les informations d'identification correspondent à des informations d'identification prédéfinies comprises dans les données préconfigurées.
PCT/IB2004/050719 2003-05-27 2004-05-17 Commande d'un systeme permettant d'avoir acces a des informations de teletexte Ceased WO2004107754A1 (fr)

Priority Applications (3)

Application Number Priority Date Filing Date Title
US10/558,487 US20070013810A1 (en) 2003-05-27 2004-05-17 Control of a system for access to teletext information
EP04785575A EP1634446A1 (fr) 2003-05-27 2004-05-17 Commande d'un systeme permettant d'avoir acces a des informations de teletexte
JP2006530871A JP2007504780A (ja) 2003-05-27 2004-05-17 テレテキスト情報にアクセスするためのシステムの制御

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
SG0300131 2003-05-27
SGPCT/SG03/00131 2003-05-27

Publications (1)

Publication Number Publication Date
WO2004107754A1 true WO2004107754A1 (fr) 2004-12-09

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PCT/IB2004/050719 Ceased WO2004107754A1 (fr) 2003-05-27 2004-05-17 Commande d'un systeme permettant d'avoir acces a des informations de teletexte

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Country Link
EP (1) EP1634446A1 (fr)
JP (1) JP2007504780A (fr)
CN (1) CN1795675A (fr)
WO (1) WO2004107754A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111464846A (zh) * 2019-12-26 2020-07-28 山东中科先进技术研究院有限公司 一种基于有线数字机顶盒的内网互访与分发方法及系统

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9800819B2 (en) * 2016-02-19 2017-10-24 Sony Corporation Methodologies and apparatus for reducing delays when receiving, processing, or switching content

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5432542A (en) * 1992-08-31 1995-07-11 Television Computer, Inc. Television receiver location identification
WO1996038984A2 (fr) * 1995-05-31 1996-12-05 Philips Electronics N.V. Procede et dispositifs de transmission de pages de teletexte
DE19531072A1 (de) * 1995-08-23 1997-02-27 Thomson Brandt Gmbh Teletextsystem mit einem Speicher
EP1164793A2 (fr) * 2000-06-09 2001-12-19 Grundig AG Procédé et dispositif pour accéder à des données boursières contenues dans des signaux télétexte

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5432542A (en) * 1992-08-31 1995-07-11 Television Computer, Inc. Television receiver location identification
WO1996038984A2 (fr) * 1995-05-31 1996-12-05 Philips Electronics N.V. Procede et dispositifs de transmission de pages de teletexte
DE19531072A1 (de) * 1995-08-23 1997-02-27 Thomson Brandt Gmbh Teletextsystem mit einem Speicher
EP1164793A2 (fr) * 2000-06-09 2001-12-19 Grundig AG Procédé et dispositif pour accéder à des données boursières contenues dans des signaux télétexte

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111464846A (zh) * 2019-12-26 2020-07-28 山东中科先进技术研究院有限公司 一种基于有线数字机顶盒的内网互访与分发方法及系统

Also Published As

Publication number Publication date
CN1795675A (zh) 2006-06-28
EP1634446A1 (fr) 2006-03-15
JP2007504780A (ja) 2007-03-01

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