GB1333886A - Separation of television signals - Google Patents

Separation of television signals

Info

Publication number
GB1333886A
GB1333886A GB4096172A GB1333886DA GB1333886A GB 1333886 A GB1333886 A GB 1333886A GB 4096172 A GB4096172 A GB 4096172A GB 1333886D A GB1333886D A GB 1333886DA GB 1333886 A GB1333886 A GB 1333886A
Authority
GB
United Kingdom
Prior art keywords
signal
line
delay
chroma
directly
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
GB4096172A
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.)
Pye Electronic Products Ltd
Original Assignee
Pye Ltd
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 Pye Ltd filed Critical Pye Ltd
Publication of GB1333886A publication Critical patent/GB1333886A/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
    • H04N9/77—Circuits for processing the brightness signal and the chrominance signal relative to each other, e.g. adjusting the phase of the brightness signal relative to the colour signal, correcting differential gain or differential phase
    • H04N9/78—Circuits for processing the brightness signal and the chrominance signal relative to each other, e.g. adjusting the phase of the brightness signal relative to the colour signal, correcting differential gain or differential phase for separating the brightness signal or the chrominance signal from the colour television signal, e.g. using comb filter

Landscapes

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

Abstract

1333886 Colour television PYE Ltd 4 Sept 1972 40961/72 Heading H4F The quadrature modulated subcarrier chroma signals U and V are separated while maintaining their quadrature relationship from a PAL colour signal with quarter line offset by means of two comb filters connected in series. As shown a PAL signal at input 1 is fed via a high pass filter 2, which passes the chroma signal and the high frequency components of the luminance signal Y, directly and via a delay of two line periods 4, 8 to an adding circuit 6, and directly to a difference circuit 13. The output from adding circuit 6 comprises 2Y and this is reduced to Y by potential divider 11 and passed to difference circuit 13. The output from difference circuit 13 is passed directly and via a delay line 17 having a delay of one line less one quarter of the colour subcarrier period to adding circuit 19 and to differencing circuit21 from which are derived the V and U chroma subcarrier signals with their quadrature relationship which are demodulated in synchronous demodulators 26 and 27 to obtain the chrominance signals Π(R-Y) and (B-Y).
GB4096172A 1972-09-04 1972-09-04 Separation of television signals Expired GB1333886A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB4096172 1972-09-04

Publications (1)

Publication Number Publication Date
GB1333886A true GB1333886A (en) 1973-10-17

Family

ID=10417464

Family Applications (1)

Application Number Title Priority Date Filing Date
GB4096172A Expired GB1333886A (en) 1972-09-04 1972-09-04 Separation of television signals

Country Status (3)

Country Link
AU (1) AU477328B2 (en)
GB (1) GB1333886A (en)
ZA (1) ZA735645B (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4136358A (en) * 1976-08-09 1979-01-23 Rca Corporation Transcoding apparatus
US4218700A (en) * 1978-05-17 1980-08-19 Nippon Electric Company, Ltd. Luminance/chrominance separating apparatus having a spatial filtering effect
US4660072A (en) * 1983-03-18 1987-04-21 Hitachi, Ltd. Television signal transmission system

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4136358A (en) * 1976-08-09 1979-01-23 Rca Corporation Transcoding apparatus
US4218700A (en) * 1978-05-17 1980-08-19 Nippon Electric Company, Ltd. Luminance/chrominance separating apparatus having a spatial filtering effect
US4660072A (en) * 1983-03-18 1987-04-21 Hitachi, Ltd. Television signal transmission system

Also Published As

Publication number Publication date
AU5981373A (en) 1975-03-06
ZA735645B (en) 1975-04-30
AU477328B2 (en) 1976-10-21

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Legal Events

Date Code Title Description
PS Patent sealed
732 Registration of transactions, instruments or events in the register (sect. 32/1977)
PCNP Patent ceased through non-payment of renewal fee