FR2390873A1 - IMPROVEMENTS TO COLOR TELEVISION SYSTEMS - Google Patents

IMPROVEMENTS TO COLOR TELEVISION SYSTEMS

Info

Publication number
FR2390873A1
FR2390873A1 FR7813744A FR7813744A FR2390873A1 FR 2390873 A1 FR2390873 A1 FR 2390873A1 FR 7813744 A FR7813744 A FR 7813744A FR 7813744 A FR7813744 A FR 7813744A FR 2390873 A1 FR2390873 A1 FR 2390873A1
Authority
FR
France
Prior art keywords
color television
television
television systems
data
modulo
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.)
Pending
Application number
FR7813744A
Other languages
French (fr)
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.)
Indesit Industria Elettrodomestici Italiana SpA
Original Assignee
Indesit Industria Elettrodomestici Italiana SpA
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
Priority claimed from IT6804477A external-priority patent/IT1083261B/en
Priority claimed from IT6836377A external-priority patent/IT1117136B/en
Application filed by Indesit Industria Elettrodomestici Italiana SpA filed Critical Indesit Industria Elettrodomestici Italiana SpA
Publication of FR2390873A1 publication Critical patent/FR2390873A1/en
Pending 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

Landscapes

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

Abstract

L'invention concerne la transmission de données supplémentaires relatives à des pages de texte écrit ou de graphiques pendant un certain nombre de lignes de télévision durant le cycle de suppression de trame d'un signal de télévision en couleur PAL ou SECAM. Les données sont introduites sous la forme de trains d'impulsions numériques à une fréquence d'horloge égale à celle de la sous-porteuse de chrominance modulo un multiple de la fréquence de ligne. Le récepteur comprend des moyens de décodage des signaux numériques et des moyens d'affichage des données décodées. L'invention permet de mieux approcher l'utilisation des récepteurs de télévision produits en grande série que les systèmes antérieurs.The invention relates to the transmission of additional data relating to pages of written text or graphics over a number of television lines during the frame blanking cycle of a PAL or SECAM color television signal. The data is entered as digital pulse trains at a clock frequency equal to that of the chrominance subcarrier modulo a multiple of the line frequency. The receiver comprises means for decoding digital signals and means for displaying the decoded data. The invention allows a better approach to the use of television receivers produced in large series than the prior systems.

FR7813744A 1977-05-10 1978-05-09 IMPROVEMENTS TO COLOR TELEVISION SYSTEMS Pending FR2390873A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT6804477A IT1083261B (en) 1977-05-10 1977-05-10 Simplified data transmission system for teletext signals - has clock pulse generator replaced by colour subcarrier and has sync. separator producing gate signal
IT6836377A IT1117136B (en) 1977-06-13 1977-06-13 Simplified data transmission system for teletext signals - has clock pulse generator replaced by colour subcarrier and has sync. separator producing gate signal

Publications (1)

Publication Number Publication Date
FR2390873A1 true FR2390873A1 (en) 1978-12-08

Family

ID=26329872

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7813744A Pending FR2390873A1 (en) 1977-05-10 1978-05-09 IMPROVEMENTS TO COLOR TELEVISION SYSTEMS

Country Status (3)

Country Link
DE (1) DE2820150A1 (en)
FR (1) FR2390873A1 (en)
GB (1) GB1585028A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1980002489A1 (en) * 1979-04-30 1980-11-13 Indep Broadcasting Authority Apparatus for decoding digital information processed for inclusion in a wide band t.v.video signal
FR2485851A2 (en) * 1980-06-26 1981-12-31 Telediffusion Fse TV recording system for copying image onto paper - uses comparators digitising colour signals for shade translation circuit

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS56169974A (en) * 1980-06-02 1981-12-26 Hitachi Ltd Receiver for multiplex information signal
JPS58148580A (en) * 1982-03-01 1983-09-03 Asahi Optical Co Ltd Inserted mark coloring circuit of video signal reproducer
GB8629971D0 (en) * 1986-12-16 1987-01-28 Thorn Emi Home Electron Signal locking

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1955710A1 (en) * 1969-11-05 1971-05-13 Standard Elek K Lorenz Ag Method for transmitting at least one audio signal within the frequency spectrum of a video signal
FR2247042A1 (en) * 1973-10-08 1975-05-02 Int Standard Electric Corp
DE2529728A1 (en) * 1973-10-08 1977-01-20 Standard Elektrik Lorenz Ag Television system with integrated audio signal transmission

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1955710A1 (en) * 1969-11-05 1971-05-13 Standard Elek K Lorenz Ag Method for transmitting at least one audio signal within the frequency spectrum of a video signal
FR2247042A1 (en) * 1973-10-08 1975-05-02 Int Standard Electric Corp
DE2529728A1 (en) * 1973-10-08 1977-01-20 Standard Elektrik Lorenz Ag Television system with integrated audio signal transmission

Non-Patent Citations (3)

* Cited by examiner, † Cited by third party
Title
GEC JOURNAL OF SCIENCE AND TECHNOLOGY, volume 41, no. 4, 1974 (WEMBLEY MIDDX, GB) A.J. BIGGS et al. "Broadcast data in television", pages 117-124 *
JOURNAL OF THE SOCIETY OF MOTION PICTURE AND TELEVISION ENGINEERS, volume 83, no. 1, janvier 1974 (SCARSDALE, N.Y. US) S.M. EDWARDSON et al. "CEEFAX: A proposed new broadcasting service", pages 14-19 *
NACHRICHTENTECHNISCHE ZEITSCHRIFT N.T.Z., volume 27, no. 11, novembre 1974 (BERLIN, DE) J. GABEL "CEEFAX - Extrainformation mit Fernsehen", pages 258-259 *

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1980002489A1 (en) * 1979-04-30 1980-11-13 Indep Broadcasting Authority Apparatus for decoding digital information processed for inclusion in a wide band t.v.video signal
FR2485851A2 (en) * 1980-06-26 1981-12-31 Telediffusion Fse TV recording system for copying image onto paper - uses comparators digitising colour signals for shade translation circuit

Also Published As

Publication number Publication date
GB1585028A (en) 1981-02-18
DE2820150A1 (en) 1978-11-16

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