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BG97648A - Декодиране на пълни телевизионни сигнали - Google Patents

Декодиране на пълни телевизионни сигнали

Info

Publication number
BG97648A
BG97648A BG97648A BG9764893A BG97648A BG 97648 A BG97648 A BG 97648A BG 97648 A BG97648 A BG 97648A BG 9764893 A BG9764893 A BG 9764893A BG 97648 A BG97648 A BG 97648A
Authority
BG
Bulgaria
Prior art keywords
signal
signals
test signal
medium levels
videosignal
Prior art date
Application number
BG97648A
Other languages
English (en)
Inventor
George Croll
Original Assignee
British Broadcasting Corporation
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 Corporation filed Critical British Broadcasting Corporation
Publication of BG97648A publication Critical patent/BG97648A/bg

Links

Classifications

    • 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
    • H04N9/646—Circuits for processing colour signals for image enhancement, e.g. vertical detail restoration, cross-colour elimination, contour correction, chrominance trapping filters
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N17/00—Diagnosis, testing or measuring for television systems or their details
    • H04N17/02—Diagnosis, testing or measuring for television systems or their details for colour television signals
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N5/00—Details of television systems
    • H04N5/14—Picture signal circuitry for video frequency region
    • H04N5/20—Circuitry for controlling amplitude response
    • H04N5/205—Circuitry for controlling amplitude response for correcting amplitude versus frequency characteristic
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N5/00—Details of television systems
    • H04N5/14—Picture signal circuitry for video frequency region
    • H04N5/21—Circuitry for suppressing or minimising disturbance, e.g. moiré or halo
    • H04N5/211—Ghost signal cancellation
    • 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

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Health & Medical Sciences (AREA)
  • Biomedical Technology (AREA)
  • General Health & Medical Sciences (AREA)
  • Testing, Inspecting, Measuring Of Stereoscopic Televisions And Televisions (AREA)
  • Television Systems (AREA)
  • Color Television Systems (AREA)

Abstract

Осигурява се система за телевизионни предавания, в която ефектите от диференциални изкривявания на пълни телевизионни сигнали са намалени. През предварително определени интервали излъченият сигнал включва тестов сигнал, съдържащ високочестотни компоненти най-малко на три средни нива на видеосигнала. В подходящо оборудван приемник след демодулирането от демодулатор на приетите телевизионни сигнали(20) се идентифицира тестов сигнал от детектор на тестов сигнал (34). Измервателни схеми (24) измерват изкривяването на тестовия сигнал на редица различни средни нива на видеосигнала, изчисляват корекцията, необходима за намаляването на ефекта от изкривяване на всяко измерено ниво на сигнала, и записват корекциите в памет (28) на клетки с адреси, извлечени от демодулирания сигнал чрез филтър (32).Записаните корекции се подават към интерполатор (40), който извлича по-нататък корекции за други средни нива на видеосигнала, като извлечените корекции се прилагат на телевизионните сигнали, приети впоследствие от управляема коригираща схема (38). 25 претенции, 3 фигури
BG97648A 1991-08-21 1993-04-20 Декодиране на пълни телевизионни сигнали BG97648A (bg)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB9118057A GB2258969A (en) 1991-08-21 1991-08-21 Decoding of composite television signals
PCT/GB1992/001532 WO1993004563A1 (en) 1991-08-21 1992-08-20 Decoding of composite television signals

Publications (1)

Publication Number Publication Date
BG97648A true BG97648A (bg) 1994-03-31

Family

ID=10700317

Family Applications (1)

Application Number Title Priority Date Filing Date
BG97648A BG97648A (bg) 1991-08-21 1993-04-20 Декодиране на пълни телевизионни сигнали

Country Status (14)

Country Link
EP (1) EP0558704A1 (bg)
JP (1) JPH06501832A (bg)
CN (1) CN1074073A (bg)
AU (1) AU2440292A (bg)
BG (1) BG97648A (bg)
BR (1) BR9205328A (bg)
CA (1) CA2094381A1 (bg)
CZ (1) CZ61693A3 (bg)
FI (1) FI931798A (bg)
GB (1) GB2258969A (bg)
HU (1) HUT64668A (bg)
NO (1) NO931440D0 (bg)
SK (1) SK34293A3 (bg)
WO (1) WO1993004563A1 (bg)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2429868B (en) * 2005-09-03 2010-11-10 Amulet Electronics Ltd Video display system
JP4968146B2 (ja) * 2008-03-31 2012-07-04 ソニー株式会社 放送信号受信機およびその受信制御方法、並びにｉｃ

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT1050574B (it) * 1975-07-01 1981-03-20 Indesit Perfezionamenti di sistemi di televisione a colori
US4237486A (en) * 1978-11-09 1980-12-02 Comsonics, Inc. Compatible transmission of an encoded signal with a television
SU1184108A1 (ru) * 1981-11-11 1985-10-07 Nikolaj M Eremin Измеритель параметров телевизионного сигнала
GB2176669A (en) * 1985-06-05 1986-12-31 Philips Electronic Associated Digitising television signals
US4825379A (en) * 1986-08-29 1989-04-25 Tektronix, Inc. Method and apparatus for processing waveform records for jitter elimination prior to averaging in determining signal to noise ratio
EP0308776B1 (en) * 1987-09-25 1993-09-01 Nippon Hoso Kyokai Decoding equalizer
US5136368A (en) * 1991-01-24 1992-08-04 The Grass Valley Group, Inc. Television signal decoder with improved architecture

Also Published As

Publication number Publication date
EP0558704A1 (en) 1993-09-08
GB2258969A (en) 1993-02-24
HU9300945D0 (en) 1993-06-28
NO931440L (no) 1993-04-20
WO1993004563A1 (en) 1993-03-04
JPH06501832A (ja) 1994-02-24
CA2094381A1 (en) 1993-02-22
GB9118057D0 (en) 1991-10-09
FI931798A0 (fi) 1993-04-21
CN1074073A (zh) 1993-07-07
HUT64668A (en) 1994-01-28
CZ61693A3 (en) 1993-11-17
AU2440292A (en) 1993-03-16
FI931798A (fi) 1993-04-21
SK34293A3 (en) 1993-07-07
BR9205328A (pt) 1994-06-21
NO931440D0 (no) 1993-04-20

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