GB1479672A - Colour television - Google Patents

Colour television

Info

Publication number
GB1479672A
GB1479672A GB3164974A GB3164974A GB1479672A GB 1479672 A GB1479672 A GB 1479672A GB 3164974 A GB3164974 A GB 3164974A GB 3164974 A GB3164974 A GB 3164974A GB 1479672 A GB1479672 A GB 1479672A
Authority
GB
United Kingdom
Prior art keywords
signal
circuit
frequency
line frequency
quarter
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
Application number
GB3164974A
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 Fernsehanlagen GmbH
Original Assignee
Robert Bosch Fernsehanlagen 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 Fernsehanlagen GmbH filed Critical Robert Bosch Fernsehanlagen GmbH
Publication of GB1479672A publication Critical patent/GB1479672A/en
Expired 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
    • H04N9/45—Generation or recovery of colour sub-carriers

Landscapes

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

Abstract

1479672 Colour television ROBERT BOSCH FERNSEHANLAGEN GmbH 17 July 1974 [25 July 1973] 31649/74 Heading H4F A PAL colour subcarrier having quarter-line offset and 25 Hz offset is produced by an oscillator 1, the 25 Hz offset being removed by a circuit 3, the resulting signal being frequency divided by 1135 at 5 to provide a signal at one quarter the line frequency which is fed to one input of a phase comparison circuit 6 which controls an oscillator 8 oscillating at a multiple (e.g. 84) of the line frequency, the output of which is fed to a circuit 7 which, by frequency division and logical coupling, produces synchronizing signals and a signal at one quarter the line frequency which is fed to the other input of the phase comparator 6. Circuit 7 provides at terminals 12-17 a line frequency sync signal, a half-line frequency sync signal, a field frequency sync signal, a synchronizing signal S, a blanking signal A, and a PAL recognition signal K respectively. Circuit 7 also produces a half-field frequency signal to control circuit 3 which suppresses one subcarrier cycle 25 times per second; a non-linear low pass member 9 may be included to remove disturbances caused by the action of circuit 3.
GB3164974A 1973-07-25 1974-07-17 Colour television Expired GB1479672A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19732337674 DE2337674C3 (en) 1973-07-25 1973-07-25 System for generating a color carrier signal coupled with synchronizing signals for a PAL color television system

Publications (1)

Publication Number Publication Date
GB1479672A true GB1479672A (en) 1977-07-13

Family

ID=5887884

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3164974A Expired GB1479672A (en) 1973-07-25 1974-07-17 Colour television

Country Status (3)

Country Link
DE (1) DE2337674C3 (en)
GB (1) GB1479672A (en)
NL (1) NL7409995A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2454734A1 (en) * 1979-04-20 1980-11-14 Hitachi Ltd TELEVISION SYNCHRONIZATION SIGNAL GENERATING DEVICE
GB2265276A (en) * 1992-02-29 1993-09-22 Samsung Electronics Co Ltd Television synchronizing signal generator

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6027469B2 (en) * 1977-05-18 1985-06-28 ソニー株式会社 Synchronization signal generator for PAL system
JPS6033031B2 (en) * 1978-12-22 1985-07-31 ソニー株式会社 PAL synchronization signal generator
DE2907346C2 (en) * 1979-02-24 1981-06-04 Rohde & Schwarz GmbH & Co KG, 8000 München PAL reference color carrier generator
DE3325886A1 (en) * 1983-07-19 1985-01-31 Robert Bosch Gmbh, 7000 Stuttgart DIGITAL CIRCUIT ARRANGEMENT

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1221667B (en) * 1963-01-03 1966-07-28 Telefunken Patent Method for generating a color carrier
NL6510673A (en) * 1965-08-14 1967-02-15

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2454734A1 (en) * 1979-04-20 1980-11-14 Hitachi Ltd TELEVISION SYNCHRONIZATION SIGNAL GENERATING DEVICE
GB2265276A (en) * 1992-02-29 1993-09-22 Samsung Electronics Co Ltd Television synchronizing signal generator
GB2265276B (en) * 1992-02-29 1995-11-15 Samsung Electronics Co Ltd Apparatus for transcoding a television signal

Also Published As

Publication number Publication date
DE2337674A1 (en) 1975-03-27
DE2337674C3 (en) 1983-11-03
DE2337674B2 (en) 1975-10-30
NL7409995A (en) 1975-01-28

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Legal Events

Date Code Title Description
PS Patent sealed
746 Register noted 'licences of right' (sect. 46/1977)
PCNP Patent ceased through non-payment of renewal fee