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FR2445677A1 - Modifier for SECAM colour TV signals - inserts line sequence identification pulses into vertical blanking intervals of colour signal - Google Patents

Modifier for SECAM colour TV signals - inserts line sequence identification pulses into vertical blanking intervals of colour signal

Info

Publication number
FR2445677A1
FR2445677A1 FR7931859A FR7931859A FR2445677A1 FR 2445677 A1 FR2445677 A1 FR 2445677A1 FR 7931859 A FR7931859 A FR 7931859A FR 7931859 A FR7931859 A FR 7931859A FR 2445677 A1 FR2445677 A1 FR 2445677A1
Authority
FR
France
Prior art keywords
colour
modifier
vertical blanking
secam
signals
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
FR7931859A
Other languages
French (fr)
Other versions
FR2445677B1 (en
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.)
Robert Bosch GmbH
Original Assignee
Robert Bosch GmbH
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 Robert Bosch GmbH filed Critical Robert Bosch GmbH
Publication of FR2445677A1 publication Critical patent/FR2445677A1/en
Application granted granted Critical
Publication of FR2445677B1 publication Critical patent/FR2445677B1/fr
Granted legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N9/00—Details of colour television systems
    • H04N9/44—Colour synchronisation
    • H04N9/47—Colour synchronisation for sequential signals

Landscapes

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

Abstract

The modifier inserts an identification pulse signal into the vertical blanking intervals of a SECAM colour signal. The SECAM switching phase is determined from colour carrier quiescent frequencies transmitted in the horizontal blanking interval. The switching phase synchronises the sequence of oscillations of the identification pulse signals in the vertical blanking interval. These identification pulses have the frequency of the colour carrier. The modifier contains two signal generators (7, 8), two frequency dividers (5, 6), and a detector (4).
FR7931859A 1978-12-29 1979-12-27 Modifier for SECAM colour TV signals - inserts line sequence identification pulses into vertical blanking intervals of colour signal Granted FR2445677A1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19782856663 DE2856663A1 (en) 1978-12-29 1978-12-29 METHOD FOR MODIFYING A SECAM COLOR TV SIGNAL

Publications (2)

Publication Number Publication Date
FR2445677A1 true FR2445677A1 (en) 1980-07-25
FR2445677B1 FR2445677B1 (en) 1984-11-23

Family

ID=6058670

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7931859A Granted FR2445677A1 (en) 1978-12-29 1979-12-27 Modifier for SECAM colour TV signals - inserts line sequence identification pulses into vertical blanking intervals of colour signal

Country Status (3)

Country Link
DE (1) DE2856663A1 (en)
FR (1) FR2445677A1 (en)
HU (1) HU181649B (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5140420A (en) * 1990-10-05 1992-08-18 General Electric Company Information in vertical blanking interval of video sync signal

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1280293B (en) * 1966-12-03 1968-10-17 Telefunken Patent Circuit arrangement for synchronizing a line-frequency switch in a color television receiver

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1280293B (en) * 1966-12-03 1968-10-17 Telefunken Patent Circuit arrangement for synchronizing a line-frequency switch in a color television receiver

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
L'ONDE ELECTRIQUE, vol. 47, no. 486, septembre 1967, PARIS (FR) *

Also Published As

Publication number Publication date
DE2856663A1 (en) 1980-07-10
HU181649B (en) 1983-10-28
DE2856663C2 (en) 1988-04-14
FR2445677B1 (en) 1984-11-23

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Legal Events

Date Code Title Description
ST Notification of lapse