FR2413837A1 - Adjustment of TV receiver colour reference levels - uses circuit switching into chrominance signals during frame suppression period - Google Patents

Adjustment of TV receiver colour reference levels - uses circuit switching into chrominance signals during frame suppression period

Info

Publication number
FR2413837A1
FR2413837A1 FR7739797A FR7739797A FR2413837A1 FR 2413837 A1 FR2413837 A1 FR 2413837A1 FR 7739797 A FR7739797 A FR 7739797A FR 7739797 A FR7739797 A FR 7739797A FR 2413837 A1 FR2413837 A1 FR 2413837A1
Authority
FR
France
Prior art keywords
reference levels
adjustment
chrominance signals
circuit switching
signals during
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.)
Granted
Application number
FR7739797A
Other languages
French (fr)
Other versions
FR2413837B1 (en
Inventor
Maurice Bouland
Marcel Rognon
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.)
Radiotechnique SA
Original Assignee
Radiotechnique SA
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 Radiotechnique SA filed Critical Radiotechnique SA
Priority to FR7739797A priority Critical patent/FR2413837A1/en
Priority to GB17546/78A priority patent/GB1583421A/en
Priority to DE2819730A priority patent/DE2819730C3/en
Priority to JP5399578A priority patent/JPS53138639A/en
Priority to PL1978206641A priority patent/PL116833B1/en
Priority to DD78205253A priority patent/DD135554A5/en
Publication of FR2413837A1 publication Critical patent/FR2413837A1/en
Application granted granted Critical
Publication of FR2413837B1 publication Critical patent/FR2413837B1/fr
Granted legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N11/00—Colour television systems
    • H04N11/06—Transmission systems characterised by the manner in which the individual colour picture signal components are combined
    • H04N11/18—Transmission systems characterised by the manner in which the individual colour picture signal components are combined using simultaneous and sequential signals, e.g. SECAM-system
    • H04N11/186—Decoding means therefor

Landscapes

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

Abstract

A TV receiver operating under the SECAM system has a circuit which adjusts the colour reference levels which is switched at an instant corresponding to a non visible part of the image. A TV receiver for the SECAM system has a colour reference adjustment circuit comprising a pass band filter (13) through which reference signals are switched (4) corresponding to rest frequencies (6, 7). These frequencies are switched (2) into the chrominance signals (1) at non visible parts of the image. The switching is performed during a fraction of the frame suppression periods to insert reference levels into the colour difference (B-Y, R-Y) signals.
FR7739797A 1977-05-06 1977-12-30 Adjustment of TV receiver colour reference levels - uses circuit switching into chrominance signals during frame suppression period Granted FR2413837A1 (en)

Priority Applications (6)

Application Number Priority Date Filing Date Title
FR7739797A FR2413837A1 (en) 1977-12-30 1977-12-30 Adjustment of TV receiver colour reference levels - uses circuit switching into chrominance signals during frame suppression period
GB17546/78A GB1583421A (en) 1977-05-06 1978-05-03 Secam television receiver
DE2819730A DE2819730C3 (en) 1977-05-06 1978-05-05 Circuit arrangement for SECAM receivers with reference signals
JP5399578A JPS53138639A (en) 1977-05-06 1978-05-06 Television set
PL1978206641A PL116833B1 (en) 1977-05-06 1978-05-06 Secam type tv signal receiving system with reference signalling facilities
DD78205253A DD135554A5 (en) 1977-05-06 1978-05-08 SECAM TELEVISION TIMER WITH ONE SETTING FOR THE COLOR REFERENCE LEVEL

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7739797A FR2413837A1 (en) 1977-12-30 1977-12-30 Adjustment of TV receiver colour reference levels - uses circuit switching into chrominance signals during frame suppression period

Publications (2)

Publication Number Publication Date
FR2413837A1 true FR2413837A1 (en) 1979-07-27
FR2413837B1 FR2413837B1 (en) 1984-08-24

Family

ID=9199557

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7739797A Granted FR2413837A1 (en) 1977-05-06 1977-12-30 Adjustment of TV receiver colour reference levels - uses circuit switching into chrominance signals during frame suppression period

Country Status (1)

Country Link
FR (1) FR2413837A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2472302A1 (en) * 1979-12-21 1981-06-26 Thomson Csf PHASE SAVING CIRCUIT, AND DEVICE COMPRISING SUCH A CIRCUIT, IN PARTICULAR FOR TELEVISION

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE715047A (en) * 1967-05-13 1968-09-30
FR2115072A7 (en) * 1970-11-27 1972-07-07 Epel

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE715047A (en) * 1967-05-13 1968-09-30
FR2115072A7 (en) * 1970-11-27 1972-07-07 Epel

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2472302A1 (en) * 1979-12-21 1981-06-26 Thomson Csf PHASE SAVING CIRCUIT, AND DEVICE COMPRISING SUCH A CIRCUIT, IN PARTICULAR FOR TELEVISION

Also Published As

Publication number Publication date
FR2413837B1 (en) 1984-08-24

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Legal Events

Date Code Title Description
ST Notification of lapse