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WO2004028147A1 - Client terminal, procede et produit programme d'ordinateur permettant de distribuer de maniere souple et separee des sous-titres, des informations teletexte et le signal de television - Google Patents

Client terminal, procede et produit programme d'ordinateur permettant de distribuer de maniere souple et separee des sous-titres, des informations teletexte et le signal de television Download PDF

Info

Publication number
WO2004028147A1
WO2004028147A1 PCT/SE2003/001414 SE0301414W WO2004028147A1 WO 2004028147 A1 WO2004028147 A1 WO 2004028147A1 SE 0301414 W SE0301414 W SE 0301414W WO 2004028147 A1 WO2004028147 A1 WO 2004028147A1
Authority
WO
WIPO (PCT)
Prior art keywords
information
client terminal
teletext information
procedure
teletext
Prior art date
Application number
PCT/SE2003/001414
Other languages
English (en)
Inventor
Per-Ola Wester
Andreas Hedin
Original Assignee
Telia Ab (Publ)
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 Telia Ab (Publ) filed Critical Telia Ab (Publ)
Priority to AU2003258945A priority Critical patent/AU2003258945A1/en
Publication of WO2004028147A1 publication Critical patent/WO2004028147A1/fr

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
    • H04N7/0884—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 additional display-information, e.g. menu for programme or channel selection
    • H04N7/0885—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 additional display-information, e.g. menu for programme or channel selection for the transmission of subtitles
    • 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

Definitions

  • Client terminal, method and computor program product for flexible distribution of separated subtitling, teletext information and television signal
  • the present invention relates according to a first aspect to a client terminal at a system for flexible distribution of teletext information.
  • the present invention relates to a procedure at a system for flexible distribution of teletext information.
  • the present invention relates to at least one computer program product to execute the procedure according to the present invention.
  • Teletext/data- TV/datavision is an old but still used system, which is based on that data is transmitted in the analog TV-system.
  • the teletext information is normally distributed included in the TV-signal. This fact applies to both analog and digital television. This means that the teletext information is transmitted to all customers, whether they are making use of it or not. The system often is experienced as slow by the user since there may be a long period of time before the page of topical interest is transmitted. With existing systems the user only can use Teletext on the channel he/she is watching.
  • the document WO-00/44 168 describes a system to transmit TV-programs to a plurality of customers, and further information which is connected with the TV- programs.
  • the program is transmitted by use of video signals which have in them included an indication signal which indicates further accessible information.
  • the indication signal can, for instance, include an address to a web site.
  • a receiver station includes a TV-set of standard type, a control box 'and a telephone set.
  • the control box interprets the video signals and includes a detector to detect the indication signal. When the indication signal is detected, the control box generates a reproduction/representation, preferably on the TV-set, which indicates the accessibility for the further information.
  • the telephone set effects telephone communication of standard type and also access to Internet to make retrieval of the further information from the Internet site possible.
  • the control box transmits it to the telephone set.
  • the telephone set then activates a modem, gains access to the Internet site, retrieves the information and transmits it to the control box.
  • the control box receives the further information and transmits it to the TV-set to be reproduced/represented either together with the TV-program, or replacing the TV-program.
  • One disadvantage with this system is that the user need further hardware, in form of, for instance, the control box.
  • the document US-A1-2001/0044726 describes a procedure and a receiver to provide/distribute a film with speech in optional language.
  • the invention can be implemented in a system including a TV- and/or a video device, an interface and a server device which can be connected to a translator studio.
  • a user can control the TV- or video device and/or the interface by means of a remote control. If a user wants to watch a transmitted film with sound signals in a preferred language, the user can, by means of a language menu presented/shown on a display on the TV- or video device, select the preferred language.
  • the user's selection of language is evaluated in a device to effect identification information corresponding to the selected language and video data for the film which the user intends to watch.
  • the identification information can include the title of the film or any other identification code extracted from, for instance, teletext data.
  • the identification information is transmitted to the server device which, after processing of the identification information, will provide sound translation data to the interface.
  • the television or video device will provide video data received from a broadcast station in synchronization with from the server device received sound translation data, so that the user can watch the film with sound signals corresponding to the by the user selected language.
  • a solution is used which combines that the information is received as unicast and broadcast, but for a very specific application.
  • a disadvantage in common of the above presented solutions is that they are not very flexible, such as that the receiver can receive information as only unicast, only broadcast or as a combination of these.
  • a client terminal at a system for flexible distribution of teletext information is effected, where the system includes an extraction device which can be run/operated to, from an analog and/or digital TV-source, separate the information depending on its type.
  • the client terminal can be run/operated to receive the information as only unicast, only broadcast or as a combination of unicast and broadcast.
  • the client terminal includes a selector device by which the user can select one of, or optional combination of, the following data flows: TV-signal (s) with teletext information from the TV-source, TV-signal (s) without teletext information from the extraction device, subtitling from the extraction device, teletext information from one in the system included server device, selected teletext information and metainformation from the server device and information regarding change, from the server device.
  • One advantage in this connection is achieved if the client terminal is a TV-terminal.
  • the client terminal also includes a web browser device.
  • the web browser device includes a web browser connected to a conversion device for conversion of the received information into for the web browser suitable information.
  • the client terminal includes a first receiver device for reception of the information as only unicast, and a second receiver device for reception of the information as only broadcast .
  • the client terminal also includes at least one memory device connected to the first receiver device and to the second receiver device for storing of information.
  • a procedure at a system for flexible distribution of telext information is effected where the system includes an extraction device which can be run/operated to, from an analog and/or digital TV-source, separate the information depending on it type.
  • the procedure includes the step: - to, by means of the client terminal, receive the information as only unicast, only broadcast, or as a combination of unicast and broadcast.
  • the procedure includes the step/steps: to, by means of the client terminal, select one of, or optional combination of, the following data flows: TV-signal (s) with teletext information, TV-signal (s) without teletext information subtitling, teletext information, selected teletext information and metainformation and information regarding change.
  • One advantage in this connection is achieved if the procedure also includes the steps: to receive the information as unicast by means of one in the client terminal (18) included first receiver device; and to receive the information as broadcast by means of one in the client terminal (18) included second receiver device.
  • the procedure also includes the steps: to receive TV-signal with teletext information by means of the second receiver device from the TV- source; to, by means of the client terminal, select the teletext information; and to, by means of the first receiver device receive selected teletext information and metainformation from a storing device to get rapid page loading of teletext information.
  • the procedure also includes the steps : - to, by means of the second receiver device, receive TV-signal without teletext information; to, by means of the second receiver device, receive subtitling; to, by means of the client terminal, select teletext information; and to, by means of the first receiver device, receive selected teletext information and metainformation from a storing device for saving of bandwidth.
  • the procedure also includes the steps: to, by means of the second receiver device, receive TV-signal without teletext information; and - to, by means of the first receiver device, receive teletext information from a storing device to make use of teletext information from another channel than the one the user at the present moment is watching via the client terminal, possible.
  • the procedure also includes the steps: to, by means of the client terminal, select teletext information; and - to, by means of the first reception device receive selected teletext information and metainformation from a storing device to make use of teletext information from another channel than the one the user at the present moment is watching via the client terminal, possible.
  • At least one computer program product which can be loaded directly into the internal memory of at least one digital computer, is effected.
  • the computer program product/ products includes software code sections to execute the steps according to the procedure when said at least one product is run on said at least one computer.
  • Figure 1 is a block diagram of a system 10 for flexible distribution of teletext information
  • Figure 2 shows schematically the data flows which exist in the in Figure 1 shown system
  • Figure 3 shows a block diagram of a first embodiment of a client terminal 18 according to the present invention
  • Figure 4 shows a block diagram of a second embodiment of a client terminal 18 according to the present invention
  • Figure 5 shows a flow chart of a procedure at a system for flexible distribution of teletext information according to the present information
  • Figure 6 shows a flow chart of a procedure for the in Figure 1 shown system 10;
  • Figure 7 shows a flow chart of a first use of the in
  • Figure 1 shown system 10 Figure 8 shows a flow chart of a second use of the in Figure 1 shown system 10; Figure 9 shows a flow chart of a third use of the in Figure 1 shown system 10; Figure 10 shows a flow chart of a fourth use of the in
  • Figure 1 shown system 10;
  • Figure 11 shows a schematic picture of some computer program products according to the present invention. Detailed description of embodiments
  • FIG. 1 a block diagram of a system 10 for flexible distribution of teletext information is shown.
  • the system 10 includes an extraction device 12 which separates teletext information, TV-signal (s) without teletext information, and subtitling from an analog and/or digital TV-source 14.
  • the system 10 also includes a server device 16 connected to the extraction device 12, which server device 16 stores the teletext information and metainformation about accessible information.
  • the system 10 also includes a client terminal 18 connected to the extraction device 12 and the server device 16. The client terminal 18 can itself decide if it shall receive the information as only unicast, only broadcast, or as a combination of unicast and broadcast.
  • the system 10 further can include one in the client terminal 18 included selector device 20, by which the user can select one of, or optional combination of, the possible data flows, which can be seen in Figure 2.
  • Figure 2 are schematically shown the data flows which exist in the in Figure 1 shown system 10.
  • the TV- source 14 transmits in ordinary way TV-signals with teletext information A which are received by both the extraction device 12 and the client terminal 18.
  • the extraction device 12 separates the data flow A into three different data flows, namely TV-signals without teletext information B, subtitling C and teletext information D.
  • the client terminal 18 can receive these data flows B, C and D directly from the extraction device 12.
  • the teletext information D is, in addition, transmitted to the server device 16.
  • a user can for instance select wanted pages with teletext information, at which the server device 16 to the client terminal 18 transmits selected teletext information and metainformation E.
  • the in Figure 2 shown arrow E is bi-directional because the transmission of the data flow E is preceded by the selection, which occurs in the opposite direction.
  • the server device 16 in addition can transmit information regarding change F to the client terminal 18.
  • the metainformation is created by the server device 16 by means of activity analysis of the teletext information.
  • the system 10 separates the teletext information D from the TV-signal A. That part of the teletext information which is considered as interesting to all users (subtitling C) is transmitted in traditional broadcast way - the larger amount of information is derived as required from the server device 16 by the client terminal 18. This means that bandwidth can be saved and that all pages are stored on the server device 16 and for that reason can be derived/retrieved immediately.
  • the teletext receiver that is the client terminal 18, can show information from just any channel. The presentation/showing of teletext information is no longer depending on which channel users are watching.
  • the system 10 stores the teletext information D on the server device 16 in a format which makes possible correct re-creation of all transmitted information.
  • On the server device 16 is also stored metainformation about which content that is accessible.
  • the receiver by that easily can have a correct information about which information that is accessible, that is, which pages and sub pages that are active. That means that the user directly will have indication about whether a page exists or not.
  • the system 10 also makes it possible to get access to the teletext information from other terminals than a TV, for instance an ordinary web browser.
  • the system 10 primarily comprises three parts: •
  • the extraction device 12 extracts the teletext information from an analog or digital TV-source 14, forwards this to the server device 16 or directly to the client terminal 18.
  • the extraction device 12 also can select a subset of information and transmit also this to the client terminal 18, for instance subtitling C.
  • a TV- signal without teletext information B is also transmitted.
  • the server device 16 stores the teletext information and metainformation about which pages that are accessible.
  • the client terminal 18 can derive/retrieve metainformation and pages of the teletext information E via unicast (today http) .
  • the server device 16 can transmit information about changes F to the client terminal 18 to eliminate unnecessary reading from the server device by the client terminal 18.
  • the client terminal 18 presents, to the user, interfaces which are similar to the today existing interfaces.
  • the client terminal 18 can get its information from a mix of data flows A -
  • FIG 3 a block diagram of a first embodiment of a client terminal 18 according to the present invention is shown.
  • the client terminal 18 includes a first receiver device 22 for reception of the information as only unicast, and a second receiver device 24 for reception of the information as only broadcast.
  • the client terminal 18 also includes at least one memory device 26 for storing of the information. For the sake of simplicity there is in Figure 3 only one memory device 26 shown.
  • the memory device 26 is connected to the first receiver device 22 and the second receiver device 24.
  • the client terminal 18 also includes one to the memory device 26 connected selector device 20, by which the user can select one of, or optional combination of, the possible data flows, which can be seen in Figure 2.
  • FIG 4 a block diagram of a second embodiment of a client terminal 18 according to the present invention is shown.
  • This client terminal 18 includes all components which are included in the in Figure 3 shown client terminal 18 and these are not described again.
  • This client terminal 18 also includes a web browser device 23, 25 including a conversion device 23 connected between one the one hand receiver device 22 and 24, and on the other memory device 26.
  • the conversion device 23 can be ' run/operated in order to convert the received information (unicast, broadcast) to one for a web browser 25 suitable information.
  • the client terminal 18 also includes a web browser 25 connected between the memory device 26 and the selector device 20.
  • the function of the client terminal 18 according to the different embodiments is the same. The difference is that in one of the cases is using web technology.
  • FIG. 5 a flow chart of a procedure at system for flexible distribution of teletext information according to the present invention is shown.
  • the procedure starts at the block 110.
  • the procedure then continues, at the block 112, with the step: To, by means of a client terminal 18, receive the information as only unicast, only broadcast, or as a combination of unicast and broadcast.
  • the procedure continues, at the block 114, with the step/steps: To, by means of the client terminal 18 select one of, or optional combination of, the following data flows: TV- signal (s) with teletext information A, TV-signal (s) without teletext information B, subtitling C, teletext information D, selected teletext information and metainformation E and information regarding change F.
  • FIG. 6 a flow chart of a procedure for flexible distribution of teletext information is shown.
  • the procedure starts at the block 30.
  • the procedure then continues, at the block 32, with the step: To, from an analog and/or digital TV-source 14, separate teletext information D, TV-signal (s) without teletext information B and subtitling C.
  • the procedure continues, at the block 34, with the step: To store the teletext information D and metainformation about accessible information.
  • the procedure then continues, at the block 36, with the step: To, by means of a client terminal 18, receive the information as only unicast, only broadcast, or as a combination of unicast and broadcast.
  • the procedure then is finished at the block 38.
  • a user can, via the client terminal 18, select one of, or optional combination of, the following data flows: TV-signal (s) with teletext information A, TV- signal (s) without teletext information B, subtitling C, teletext information D, selected teletext information and metainformation E and information regarding change F.
  • FIG. 7 a flow chart of a first use of the system 10 is shown.
  • the procedure starts at the block 40.
  • the procedure then continues, at the block 42, with the step:.
  • the procedure continues, at the block 44, with the step: To, by means of the client terminal 18, select teletext information.
  • the procedure then continues, at the block 46, with the step: To, by means of the client terminal 18, select teletext information and metainformation E from a storing device. This results in rapid page loading of teletext information.
  • the procedure then is finished at the block 48.
  • FIG 8 a flow chart of a second use of the system 10 is shown.
  • the procedure starts at the block 50.
  • the procedure then continues, at the block 52, with the step: To, by means of the client terminal 18, receive TV-signal without teletext information B.
  • the procedure continues, at the block 54, with the step: To, by means of the client terminal 18, receive subtitling C.
  • the procedure then continues, at the block 56, with the step: To, by means of the client terminal 18, select teletext information.
  • the procedure continues, at the block 58, with the step: To, by means of the client terminal 18, receive selected teletext information and metainformation E from a storing device.
  • the procedure then is finished at the block 60. This procedure results in that bandwidth is saved.
  • FIG 9 a flow chart of a third use of the system 10 is shown.
  • the procedure starts at the block 70.
  • the procedure then continues, at the block 72, with the step: To, by means of the client terminal 18, receive TV-signal without teletext information B.
  • the procedure continues, at the block 74, with the step: To, by means of the client terminal 18, receive teletext information D from the extraction device (12) .
  • the procedure then is finished at the block 76.
  • This procedure makes it possible for a user to get access to teletext information from another channel than the one the user at the present moment is watching via the client terminal 18.
  • FIG. 10 a flow chart of a fourth use of the system 10 is shown.
  • the procedure starts at the block 80.
  • the procedure then continues, at the block 82, with the step: To, by means of the client terminal 18, receive TV- signal without teletext information B.
  • the procedure continues, at the block 84, with the step: To, by means of the client terminal 18, select teletext information.
  • the procedure then continues, at the block 86, with the step: To, by means of the client terminal 18, receive selected teletext information E from a storing device.
  • Each 102 ⁇ , ..., 102 n include software code sections to execute some or all steps according to the patent claim 9 when the product/products 102 ⁇ , ..., 102 n are run on the computer/ computers 100 ⁇ , ..., 100 n .
  • the computer program products
  • 102 ⁇ ,..., 102 n can, for instance, be in form of diskettes, RAM- disks, magnetic tape, optomagnetic disks, or any other suitable products.
  • the computer program products also can be distributed via some form of computer network. It should be emphasized that the change of flow F per channel can be used to minimize the data flow E.
  • IP computer network
  • all teletext information is received via the system 10.
  • the client terminal 18 does not receive the data flow A.
  • the client terminal 18 makes use of the data flow B to receive the TV-signal.
  • the client terminal 18 receives the data flows C, E and F.
  • the point of it here is that the client terminal 18 does not all the time need to receive all teletext information but only that which the user is interested in (subtitling and selected pages) and that the client terminal can receive teletext pages from a channel which is not the channel the B- and C-data flows of which are received.
  • the distribution is made over a combination of computer network and digital TV-network.
  • the data flow A in Figure 2 is divided into the data flows Al and A2, both including TV- signal (s) with teletext information.
  • the data flow Al is passing via the digital TV-network (DVB-T, DVB-C or DVB-S) to the client terminal 18.
  • the data flow A2 is coming in to the extraction device 16 via another network, which can be a computer network or a digital TV-network.
  • the client terminal for instance a digital TV-receiver
  • the client terminal is using the system primarily to increase the speed at deriving/retrieving of pages (the data flow E) . Updating of pages the client terminal 19 can get either via the data flow Al or F.
  • the data flows F and E are passing via the back channel of the client terminal 18 (which is capable of bi-directional transmission) .
  • the advantage/gain here is that loading of pages will be more rapid and that the client terminal 18 can receive teletext pages from a channel which is not the channel the Al-flow of which is received.
  • system 10 is used to make possible for the client terminal 18 to show teletext pages from another channel than the one that is transmitted.
  • the client terminal 18 receives the data flows B and C from the channel the TV-signal of which shall be shown, the data flow F from the channel the teletext information of which is wanted and uses the data flow E to get the metainformation and the selected teletext pages .
  • the point of it here is that loading of pages is made more rapid and that the client terminal 18 need not receive teletext pages from a channel which is of no interest.
  • the client terminal might have had to receive an extra A-data flow in order to receive teletext information from another channel than the one the TV-signal of which is shown.

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

Abstract

L'invention concerne un terminal client (18) se trouvant au sein d'un système (10), conçu pour distribuer de manière souple des informations télétexte. Ce système (10) comprend un dispositif d'extraction (12) pouvant fonctionner/être commandé au moyen d'une source télévisuelle analogique et/ou numérique (14) et séparer lesdites informations en fonction de leur nature. Le terminal client (18) peut fonctionner/être commandé pour recevoir les informations uniquement en unidiffudion, uniquement en télédiffusion ou sous forme combinée unidiffusion et télédiffusion.
PCT/SE2003/001414 2002-09-23 2003-09-11 Client terminal, procede et produit programme d'ordinateur permettant de distribuer de maniere souple et separee des sous-titres, des informations teletexte et le signal de television WO2004028147A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU2003258945A AU2003258945A1 (en) 2002-09-23 2003-09-11 Client terminal, method and computor program product for flexible distribution of separated subtitling, teletext information and television signal

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
SE0202807-4 2002-09-23
SE0202807A SE0202807L (sv) 2002-09-23 2002-09-23 Klientterminal, förfarande och datorprogram för flexibel distribution av separerad undertextning, teletextinformation och TV-signal

Publications (1)

Publication Number Publication Date
WO2004028147A1 true WO2004028147A1 (fr) 2004-04-01

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PCT/SE2003/001414 WO2004028147A1 (fr) 2002-09-23 2003-09-11 Client terminal, procede et produit programme d'ordinateur permettant de distribuer de maniere souple et separee des sous-titres, des informations teletexte et le signal de television

Country Status (3)

Country Link
AU (1) AU2003258945A1 (fr)
SE (1) SE0202807L (fr)
WO (1) WO2004028147A1 (fr)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5748736A (en) * 1996-06-14 1998-05-05 Mittra; Suvo System and method for secure group communications via multicast or broadcast
EP0840509A2 (fr) * 1996-10-30 1998-05-06 International Business Machines Corporation Système et méthode pour accéder à des fichiers de données dans un réseau informatique
JPH10257446A (ja) * 1997-03-07 1998-09-25 Hitachi Ltd データ放送受信方法およびデータ放送受信装置
US6239843B1 (en) * 1997-05-05 2001-05-29 Wavo Corporation Method and system for decoding data in a signal
US6239844B1 (en) * 1998-12-05 2001-05-29 U.S. Philips Corporation Television receiver

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5748736A (en) * 1996-06-14 1998-05-05 Mittra; Suvo System and method for secure group communications via multicast or broadcast
EP0840509A2 (fr) * 1996-10-30 1998-05-06 International Business Machines Corporation Système et méthode pour accéder à des fichiers de données dans un réseau informatique
JPH10257446A (ja) * 1997-03-07 1998-09-25 Hitachi Ltd データ放送受信方法およびデータ放送受信装置
US6239843B1 (en) * 1997-05-05 2001-05-29 Wavo Corporation Method and system for decoding data in a signal
US6239844B1 (en) * 1998-12-05 2001-05-29 U.S. Philips Corporation Television receiver

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
DATABASE WPI Week 199849, Derwent World Patents Index; Class H04, AN 1998-575516 *

Also Published As

Publication number Publication date
SE0202807L (sv) 2004-03-24
AU2003258945A1 (en) 2004-04-08
SE0202807D0 (sv) 2002-09-23

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