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BG97648A - Decoding of full tv signals - Google Patents

Decoding of full tv signals

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
Bulgarian (bg)
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/en

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

A system for TV transmissions is secured where the effects of differential distortions of full TV signals are reduced. The emitted signal, by preset intervals, includes a test signal containing high frequency components at least on three medium levels of the videosignal. A test signal from a test signal detector (34) is intentified in an adequately equipped receiver after the demodulation from a demodulator of the received TV signals (20). Metering circuits (24) measure the distortions of the test signal of many different medium levels of the video signal, compute the agjustment required to reduce the distortion effect of every measured level of the signal and the adjustment are recorded into a memory of adress celles extracted from the demodulated signal by means of a filter (32). The recorded adjustments are fed to an interpolator (40) which further extracts adjustments for other medium levels of the videosignal, and the extracted corrections are applied to the TV signals subsequently received by a controllable adjustment circuit (38).
BG97648A 1991-08-21 1993-04-20 Decoding of full tv signals BG97648A (en)

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 (en) 1994-03-31

Family

ID=10700317

Family Applications (1)

Application Number Title Priority Date Filing Date
BG97648A BG97648A (en) 1991-08-21 1993-04-20 Decoding of full tv signals

Country Status (14)

Country Link
EP (1) EP0558704A1 (en)
JP (1) JPH06501832A (en)
CN (1) CN1074073A (en)
AU (1) AU2440292A (en)
BG (1) BG97648A (en)
BR (1) BR9205328A (en)
CA (1) CA2094381A1 (en)
CZ (1) CZ61693A3 (en)
FI (1) FI931798A0 (en)
GB (1) GB2258969A (en)
HU (1) HUT64668A (en)
NO (1) NO931440D0 (en)
SK (1) SK34293A3 (en)
WO (1) WO1993004563A1 (en)

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 (en) * 2008-03-31 2012-07-04 ソニー株式会社 Broadcast signal receiver, reception control method thereof, and IC

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT1050574B (en) * 1975-07-01 1981-03-20 Indesit IMPROVEMENTS OF COLOR TELEVISION SYSTEMS
US4237486A (en) * 1978-11-09 1980-12-02 Comsonics, Inc. Compatible transmission of an encoded signal with a television
SU1184108A1 (en) * 1981-11-11 1985-10-07 Nikolaj M Eremin Meter of parameters of television signal
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
EP0526913B1 (en) * 1987-09-25 1996-03-20 Nippon Hoso Kyokai Subrange-type A/D converter
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
CZ61693A3 (en) 1993-11-17
FI931798A (en) 1993-04-21
JPH06501832A (en) 1994-02-24
WO1993004563A1 (en) 1993-03-04
HU9300945D0 (en) 1993-06-28
GB9118057D0 (en) 1991-10-09
CN1074073A (en) 1993-07-07
AU2440292A (en) 1993-03-16
SK34293A3 (en) 1993-07-07
GB2258969A (en) 1993-02-24
BR9205328A (en) 1994-06-21
HUT64668A (en) 1994-01-28
CA2094381A1 (en) 1993-02-22
NO931440L (en) 1993-04-20
FI931798A0 (en) 1993-04-21
EP0558704A1 (en) 1993-09-08
NO931440D0 (en) 1993-04-20

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