ES2100903T3 - Aparato de television con procesamiento de señales de teletexto. - Google Patents

Aparato de television con procesamiento de señales de teletexto.

Info

Publication number
ES2100903T3
ES2100903T3 ES91109325T ES91109325T ES2100903T3 ES 2100903 T3 ES2100903 T3 ES 2100903T3 ES 91109325 T ES91109325 T ES 91109325T ES 91109325 T ES91109325 T ES 91109325T ES 2100903 T3 ES2100903 T3 ES 2100903T3
Authority
ES
Spain
Prior art keywords
teletext
signal
teletext signal
clock
signal processing
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.)
Expired - Lifetime
Application number
ES91109325T
Other languages
English (en)
Inventor
John Michael Rowe
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.)
Thomson Multimedia Sales UK Ltd
Original Assignee
Thomson Multimedia Sales UK Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Thomson Multimedia Sales UK Ltd filed Critical Thomson Multimedia Sales UK Ltd
Application granted granted Critical
Publication of ES2100903T3 publication Critical patent/ES2100903T3/es
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N7/00—Television systems
    • H04N7/025—Systems for the transmission of digital non-picture data, e.g. of text during the active part of a television frame
    • H04N7/035—Circuits for the digital non-picture data signal, e.g. for slicing of the data signal, for regeneration of the data-clock signal, for error detection or correction of the data signal
    • H04N7/0352—Circuits for the digital non-picture data signal, e.g. for slicing of the data signal, for regeneration of the data-clock signal, for error detection or correction of the data signal for regeneration of the clock signal
    • 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
    • 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

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Television Systems (AREA)

Abstract

UNA SEÑAL DE TELETEXTO DIGITAL ES TRANSMITIDA DURANTE PARTE DE UN PERIODO DE RESPALDO VERTICAL DE UNA SEÑAL TELEVISIVA. UN OSCILADOR DE RELOJ SINCRONIZADO POR LA SEÑAL DE TELETEXTO ESTA ACOPLADO AL IMPUT DE SINCRONIZACION DE UN CIRCUITO LOGICO SUMINISTRANDO SEÑALES DE RELOJ Y DE DATOS PARA EL PROCESAMIENTO DEL TELETEXTO. PARA EVITAR QUE LOS ARMONICOS ALTOS SEAN INCLUIDOS EN LAS SEÑALES DE RELOJ Y DATOS Y QUE PRODUZCAN INTERFERENCIAS DENTRO DE LA IMAGEN REPRODUCIDA, SE REDUCE LA AMPLITUD DE LA SEÑAL DE SALIDA DEL OSCILADOR DE RELOJ, DURANTE LA TRAZA VERTICAL, CUANDO LA SEÑAL DEL TELETEXTO NO SE TRASMITE, CON OBJETO DE EVITAR LAS OPERACIONES DE CONMUTACION EN EL CIRCUITO LOGICO.
ES91109325T 1990-06-15 1991-06-07 Aparato de television con procesamiento de señales de teletexto. Expired - Lifetime ES2100903T3 (es)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB909013434A GB9013434D0 (en) 1990-06-15 1990-06-15 Television device with processing of teletext signals

Publications (1)

Publication Number Publication Date
ES2100903T3 true ES2100903T3 (es) 1997-07-01

Family

ID=10677708

Family Applications (1)

Application Number Title Priority Date Filing Date
ES91109325T Expired - Lifetime ES2100903T3 (es) 1990-06-15 1991-06-07 Aparato de television con procesamiento de señales de teletexto.

Country Status (7)

Country Link
EP (1) EP0461551B1 (es)
JP (1) JPH05122665A (es)
KR (1) KR0178398B1 (es)
AT (1) ATE149771T1 (es)
DE (1) DE69124845T2 (es)
ES (1) ES2100903T3 (es)
GB (2) GB9013434D0 (es)

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4202012A (en) * 1977-03-15 1980-05-06 Matsushita Electric Industrial Co., Ltd. Sampling clock reproducing device
FR2496376B1 (fr) * 1980-12-11 1985-06-28 Signalisation Continental Procede et systeme de teletexte pour l'affichage de donnees sur l'ecran d'un recepteur de television
JPS598485A (ja) * 1982-07-05 1984-01-17 Matsushita Electric Ind Co Ltd 文字多重放送受信機
US4638358A (en) * 1982-07-19 1987-01-20 Matsushita Electric Industrial Co., Ltd. Sampling clock reproducing circuit
DE3242517A1 (de) * 1982-11-18 1984-05-24 Robert Bosch Gmbh, 7000 Stuttgart Zaehlvorrichtung fuer fernsehanlagen
US4620227A (en) * 1984-01-30 1986-10-28 Cybernetic Data Products Data decoder
FR2608873B1 (fr) * 1986-12-23 1989-03-24 Radiotechnique Compelec Dispositif de reception de donnees numeriques comportant un circuit de reconnaissance de debut de paquet

Also Published As

Publication number Publication date
EP0461551A2 (en) 1991-12-18
KR0178398B1 (ko) 1999-05-01
GB2245464A (en) 1992-01-02
EP0461551B1 (en) 1997-03-05
DE69124845T2 (de) 1997-09-18
KR920001959A (ko) 1992-01-30
DE69124845D1 (de) 1997-04-10
GB9013434D0 (en) 1990-08-08
JPH05122665A (ja) 1993-05-18
GB9112462D0 (en) 1991-07-31
EP0461551A3 (en) 1993-03-17
ATE149771T1 (de) 1997-03-15

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