GB2007067A - PAL television receiver sub- carrier regenerator - Google Patents

PAL television receiver sub- carrier regenerator

Info

Publication number
GB2007067A
GB2007067A GB7840227A GB7840227A GB2007067A GB 2007067 A GB2007067 A GB 2007067A GB 7840227 A GB7840227 A GB 7840227A GB 7840227 A GB7840227 A GB 7840227A GB 2007067 A GB2007067 A GB 2007067A
Authority
GB
United Kingdom
Prior art keywords
oscillator
regenerator
sub
television receiver
carrier
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
GB7840227A
Other versions
GB2007067B (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.)
British Broadcasting Corp
Original Assignee
British Broadcasting Corp
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 British Broadcasting Corp filed Critical British Broadcasting Corp
Priority to GB7840227A priority Critical patent/GB2007067B/en
Publication of GB2007067A publication Critical patent/GB2007067A/en
Application granted granted Critical
Publication of GB2007067B publication Critical patent/GB2007067B/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
    • H04N9/455—Generation of colour burst signals; Insertion of colour burst signals in colour picture signals or separation of colour burst signals from colour picture signals

Landscapes

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

Abstract

The regenerator is of the type in which the PAL signal is fed both direct and via a one-line delay 12 to an adder 14 and a subtractor 16 whose outputs pass via full-wave rectifiers 36, 38 to control a sub- carrier oscillator 50, and is characterized by a second sub-carrier oscillator 40 which is controlled by the colour burst and which also controls the oscillator 50. To ensure that the regenerator synchronizes correctly on the colour burst and maintains approximately constant phase but also follows any rapid change in the phase of the chroma signal, oscillator 50 has a larger frequency change for a given control signal than does oscillator 40. The regenerator may be used in a colour decoder in which oscillator 50 feeds demodulators 20, 24 receiving the separated chroma components. <IMAGE>
GB7840227A 1977-10-26 1978-10-12 Colour television processors Expired GB2007067B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB7840227A GB2007067B (en) 1977-10-26 1978-10-12 Colour television processors

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB4460277 1977-10-26
GB7840227A GB2007067B (en) 1977-10-26 1978-10-12 Colour television processors

Publications (2)

Publication Number Publication Date
GB2007067A true GB2007067A (en) 1979-05-10
GB2007067B GB2007067B (en) 1982-03-03

Family

ID=26265424

Family Applications (1)

Application Number Title Priority Date Filing Date
GB7840227A Expired GB2007067B (en) 1977-10-26 1978-10-12 Colour television processors

Country Status (1)

Country Link
GB (1) GB2007067B (en)

Also Published As

Publication number Publication date
GB2007067B (en) 1982-03-03

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Legal Events

Date Code Title Description
PCNP Patent ceased through non-payment of renewal fee