FR2444386A1 - Colour reference control for SECAM system TV receivers - uses DC levels derived from sampled and stored signals via common potentiometer - Google Patents

Colour reference control for SECAM system TV receivers - uses DC levels derived from sampled and stored signals via common potentiometer

Info

Publication number
FR2444386A1
FR2444386A1 FR7835384A FR7835384A FR2444386A1 FR 2444386 A1 FR2444386 A1 FR 2444386A1 FR 7835384 A FR7835384 A FR 7835384A FR 7835384 A FR7835384 A FR 7835384A FR 2444386 A1 FR2444386 A1 FR 2444386A1
Authority
FR
France
Prior art keywords
receivers
sampled
levels
colour
signals via
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.)
Withdrawn
Application number
FR7835384A
Other languages
French (fr)
Inventor
Jean-Claude Guillon
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-Brandt SA
Original Assignee
Thomson-Brandt 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 Thomson-Brandt SA filed Critical Thomson-Brandt SA
Priority to FR7835384A priority Critical patent/FR2444386A1/en
Priority to ES486859A priority patent/ES8102447A1/en
Priority to BE0/198545A priority patent/BE880593A/en
Priority to PT7059479A priority patent/PT70594A/en
Priority to PL22042879A priority patent/PL220428A1/xx
Publication of FR2444386A1 publication Critical patent/FR2444386A1/en
Priority to GR60750A priority patent/GR73688B/el
Withdrawn legal-status Critical Current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
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N9/00—Details of colour television systems
    • H04N9/64—Circuits for processing colour signals
    • H04N9/72—Circuits for processing colour signals for reinsertion of DC and slowly varying components of colour signals

Abstract

The control system is for TV receivers using the SECAM colour system. The circuit allows correct measurement of the frequency excursion of the colour signals from the two sub-carrier reference or 'black' levels. A signal generated in response to a stable reference frequency is sampled and stored and provides a DC level as a function of this reference. The two DC levels associated with each sub-carrier colour signal are injected downstream of the demodulators during the line or frame flyback time. The DC levels are derived from the store via a common potentiometer.
FR7835384A 1978-12-15 1978-12-15 Colour reference control for SECAM system TV receivers - uses DC levels derived from sampled and stored signals via common potentiometer Withdrawn FR2444386A1 (en)

Priority Applications (6)

Application Number Priority Date Filing Date Title
FR7835384A FR2444386A1 (en) 1978-12-15 1978-12-15 Colour reference control for SECAM system TV receivers - uses DC levels derived from sampled and stored signals via common potentiometer
ES486859A ES8102447A1 (en) 1978-12-15 1979-12-13 Colour reference control for SECAM system TV receivers - uses DC levels derived from sampled and stored signals via common potentiometer
BE0/198545A BE880593A (en) 1978-12-15 1979-12-13 METHOD AND CIRCUIT FOR SETTING THE COLOR REFERENCE LEVELS IN A "SECAM" TELEVISION RECEIVER
PT7059479A PT70594A (en) 1978-12-15 1979-12-13 METHOD AND CIRCUIT FOR SETTING THE COLOR REFERENCE LEVELS IN A SECAM SYSTEM TELEVISION RECEIVER
PL22042879A PL220428A1 (en) 1978-12-15 1979-12-14
GR60750A GR73688B (en) 1978-12-15 1981-04-03

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7835384A FR2444386A1 (en) 1978-12-15 1978-12-15 Colour reference control for SECAM system TV receivers - uses DC levels derived from sampled and stored signals via common potentiometer

Publications (1)

Publication Number Publication Date
FR2444386A1 true FR2444386A1 (en) 1980-07-11

Family

ID=9216189

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7835384A Withdrawn FR2444386A1 (en) 1978-12-15 1978-12-15 Colour reference control for SECAM system TV receivers - uses DC levels derived from sampled and stored signals via common potentiometer

Country Status (6)

Country Link
BE (1) BE880593A (en)
ES (1) ES8102447A1 (en)
FR (1) FR2444386A1 (en)
GR (1) GR73688B (en)
PL (1) PL220428A1 (en)
PT (1) PT70594A (en)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1478484A (en) * 1966-03-04 1967-04-28 Cft Comp Fse Television Improvements to devices for restoring DC components and erasing spurious signals in color television
FR1565237A (en) * 1967-05-13 1969-04-25
FR2115072A7 (en) * 1970-11-27 1972-07-07 Epel
DE2819730A1 (en) * 1977-05-06 1978-11-09 Philips Nv SECAM TELEVISION RECEIVER WITH A SETTING ARRANGEMENT FOR THE COLOR REFERENCE LEVEL

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1478484A (en) * 1966-03-04 1967-04-28 Cft Comp Fse Television Improvements to devices for restoring DC components and erasing spurious signals in color television
FR1565237A (en) * 1967-05-13 1969-04-25
FR2115072A7 (en) * 1970-11-27 1972-07-07 Epel
DE2819730A1 (en) * 1977-05-06 1978-11-09 Philips Nv SECAM TELEVISION RECEIVER WITH A SETTING ARRANGEMENT FOR THE COLOR REFERENCE LEVEL

Also Published As

Publication number Publication date
ES486859A0 (en) 1980-12-16
BE880593A (en) 1980-04-01
ES8102447A1 (en) 1980-12-16
PL220428A1 (en) 1980-09-22
GR73688B (en) 1984-04-02
PT70594A (en) 1980-01-01

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Legal Events

Date Code Title Description
ST Notification of lapse