SG54091G - Circuit for improving the sharpness of a picture reproduced by a video recorder - Google Patents

Circuit for improving the sharpness of a picture reproduced by a video recorder

Info

Publication number
SG54091G
SG54091G SG54091A SG54091A SG54091G SG 54091 G SG54091 G SG 54091G SG 54091 A SG54091 A SG 54091A SG 54091 A SG54091 A SG 54091A SG 54091 G SG54091 G SG 54091G
Authority
SG
Singapore
Prior art keywords
circuit
luminance signal
video recorder
sharpness
improving
Prior art date
Application number
SG54091A
Original Assignee
Thomson Brandt 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 Thomson Brandt Gmbh filed Critical Thomson Brandt Gmbh
Publication of SG54091G publication Critical patent/SG54091G/en

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N5/00—Details of television systems
    • H04N5/76—Television signal recording
    • H04N5/91—Television signal processing therefor

Abstract

1. A circuit for producing a corrected luminance signal (Y"') in a video recorder, in which the original luminance signal (Y**o ), corrected in a de-emphasis means is applied via a frequency filter (3), an amplifier (4) and an amplitude limiter (6) to an adding stage (9), characterised in that the frequency filter is formed as a band pass filter (3) having a pass band of 2 - 3.5 MHz, which corresponds to the part of the frequency range in which the amplitude of the luminance signal (Y**o ) falls to zero and that the uncorrected luminance signal (Y) is supplied moreover to the adding stage (9).
SG54091A 1985-06-20 1991-07-09 Circuit for improving the sharpness of a picture reproduced by a video recorder SG54091G (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19853521991 DE3521991A1 (en) 1985-06-20 1985-06-20 CIRCUIT TO IMPROVE PLAYBACK SHARPNESS IN A VIDEO RECORDER

Publications (1)

Publication Number Publication Date
SG54091G true SG54091G (en) 1991-08-23

Family

ID=6273683

Family Applications (1)

Application Number Title Priority Date Filing Date
SG54091A SG54091G (en) 1985-06-20 1991-07-09 Circuit for improving the sharpness of a picture reproduced by a video recorder

Country Status (6)

Country Link
EP (1) EP0208121B1 (en)
JP (1) JPS6224783A (en)
AT (1) ATE48503T1 (en)
DE (2) DE3521991A1 (en)
HK (1) HK77591A (en)
SG (1) SG54091G (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3713225C1 (en) * 1987-04-18 1988-08-11 Standard Elektrik Lorenz Ag Video device with a recording medium
DE3940128A1 (en) * 1989-04-27 1990-10-31 Thomson Brandt Gmbh CIRCUIT FOR PROCESSING A LUMINOUS SIGNAL SIGNAL
KR920007607B1 (en) * 1989-09-01 1992-09-08 삼성전자 주식회사 Contrast adjusting circuit in digital television receiver

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1230467B (en) * 1960-12-19 1966-12-15 Minnesota Mining & Mfg Device for improving the ratio of signal voltage to noise voltage in the transmission or magnetic storage of electrical signals
US3333055A (en) * 1963-06-01 1967-07-25 Fernseh Gmbh Apparatus for increasing the signal-to-noise ratio of a television signal
JPS5428981Y2 (en) * 1974-06-17 1979-09-17
US3715477A (en) * 1971-03-11 1973-02-06 Rca Corp Video signal noise-limiting apparatus
JPS5539948B2 (en) * 1973-12-17 1980-10-15
JPS55117712A (en) * 1979-02-28 1980-09-10 Matsushita Electric Ind Co Ltd Noise reduction circuit of video signal recording and reproducing device
US4386434A (en) * 1981-06-08 1983-05-31 Rca Corporation Vertical and horizontal detail signal processor
US4520396A (en) * 1983-07-25 1985-05-28 Rca Corporation FM video transmission system having coring and coring compensation for reducing effects of triangular noise

Also Published As

Publication number Publication date
DE3521991A1 (en) 1987-01-02
EP0208121A1 (en) 1987-01-14
JPS6224783A (en) 1987-02-02
EP0208121B1 (en) 1989-12-06
DE3667372D1 (en) 1990-01-11
HK77591A (en) 1991-10-11
ATE48503T1 (en) 1989-12-15

Similar Documents

Publication Publication Date Title
GB1506602A (en) Noise eliminator circuits
KR850001443B1 (en) Signal recording circuit in video tape recorder
GB1526517A (en) Amplitude limiting circuit for frequency modulated video signals
AU1825688A (en) Color video signal reproducing apparatus
HK77591A (en) Circuit for improving the sharpness of a picture reproduced by a video recorder
JPS55125786A (en) Recording and reproduction method for video signal
EP0308775A3 (en) Magnetic recording and reproducing apparatus
DE59008894D1 (en) VCR for recording and playing back letterbox video signals.
ES8700478A1 (en) Apparatus for magnetically recording and/or reproducing audio and video signals.
JPS54139333A (en) Color television receiver
JPS57190490A (en) Signal processing circuit of magnetic recording and reproducing device
EP0373074A3 (en) Frequency demodulating circuit for video reproducing apparatus
MY104750A (en) High quality video signal recording circuit.
PL268660A1 (en) Videorecorder
JPS57190487A (en) Signal processing circuit of magnetic recording and reproducing device
GR3006546T3 (en)
JPS5630375A (en) Video signal recording and reproducting device
JPS6435774A (en) Video tape recorder
JPS6460094A (en) Device for reproducing video signal in magnetic recording and reproducing system
JPS6436185A (en) Still video player
JPS6378690A (en) Video signal processor
JPS6489681A (en) Magnetic recording/reproducing device
JPS57181290A (en) Recording device for video signal
JPS5583389A (en) Recording and reproducing system for secam type color television signal
JPS56122289A (en) Vtr circuit