KR960025625A - SECAM type video signal recording / playback device with image quality compensation - Google Patents

SECAM type video signal recording / playback device with image quality compensation Download PDF

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Publication number
KR960025625A
KR960025625A KR1019940040132A KR19940040132A KR960025625A KR 960025625 A KR960025625 A KR 960025625A KR 1019940040132 A KR1019940040132 A KR 1019940040132A KR 19940040132 A KR19940040132 A KR 19940040132A KR 960025625 A KR960025625 A KR 960025625A
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KR
South Korea
Prior art keywords
signal
mhz
output
filter
inputting
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KR1019940040132A
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Korean (ko)
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KR0151018B1 (en
Inventor
임만규
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김광호
삼성전자 주식회사
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Priority to KR1019940040132A priority Critical patent/KR0151018B1/en
Priority to JP7337432A priority patent/JPH08251623A/en
Priority to FR9515569A priority patent/FR2729035B1/en
Priority to CN95121725A priority patent/CN1104809C/en
Publication of KR960025625A publication Critical patent/KR960025625A/en
Application granted granted Critical
Publication of KR0151018B1 publication Critical patent/KR0151018B1/en

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    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B20/00—Signal processing not specific to the method of recording or reproducing; Circuits therefor
    • G11B20/22—Signal processing not specific to the method of recording or reproducing; Circuits therefor for reducing distortions
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N9/00—Details of colour television systems
    • H04N9/79—Processing of colour television signals in connection with recording
    • H04N9/80—Transformation of the television signal for recording, e.g. modulation, frequency changing; Inverse transformation for playback
    • H04N9/86—Transformation of the television signal for recording, e.g. modulation, frequency changing; Inverse transformation for playback the individual colour picture signal components being recorded sequentially and simultaneously, e.g. corresponding to SECAM-system
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N9/00—Details of colour television systems
    • H04N9/79—Processing of colour television signals in connection with recording
    • H04N9/793—Processing of colour television signals in connection with recording for controlling the level of the chrominance signal, e.g. by means of automatic chroma control circuits

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

Abstract

본 발명은 화질보상 기능을 갖는 SECAM 방식 비디오 신호의 기록/재생장치에 관한 것으로 특히, 본 발명의 장치는 수신된 복합 비디오 신호에서 색도신호만을 통과시키는 4.3MHz 대역통과필터; 상기 4.3MHz 대역통과필터를 통과한 색도신호를 강조하는 4.28MHz 벨필터; 상기 4.3MHz 대역통과필터의 출력과 버스트 게이트펄스와 상기 4.28MHz 벨필터의 출력을 입력하여 기준신호에 대한 버스트 레벨의 변동에 따라 색도신호의 크기를 증폭하는 화질보상회로; 상기 4.28MHz 벨필터의 출력을 입력하여 색도신호의 진폭을 일정하게 제한하고, 노이즈와 진폭변조부분을 제거하는 리미터; 및 상기 리미터에서 입력한 색도 신호의 주파수를 저역변환하는 저역변환회로를 구비한다.The present invention relates to an apparatus for recording / reproducing a SECAM type video signal having an image quality compensation function, and more particularly, to an apparatus of the present invention comprising: a 4.3 MHz band pass filter for passing only a chroma signal in a received composite video signal; A 4.28 MHz bell filter for emphasizing the chroma signal passing through the 4.3 MHz band pass filter; An image quality compensation circuit for inputting the output of the 4.3 MHz band pass filter, the burst gate pulse, and the output of the 4.28 MHz bell filter to amplify the magnitude of the chroma signal according to the change in the burst level with respect to the reference signal; A limiter for inputting the output of the 4.28 MHz bell filter to constantly limit the amplitude of the chromaticity signal and to remove noise and amplitude modulation parts; And a low frequency conversion circuit for low frequency converting the frequency of the chroma signal input from the limiter.

따라서, 본 발명은 SECAM 방식 비디오 신호의 버스트 레벨 변동에 따른 색도신호 레벨을 보상함으로서 재생시 화질의 열화를 보상하는 효과가 있다.Accordingly, the present invention compensates for the chromaticity signal level according to the burst level variation of the SECAM video signal, thereby compensating for the degradation of the image quality during reproduction.

Description

화질보상 기능을 갖는 SECAM 방식 비디오 신호의 기록/재생장치SECAM type video signal recording / playback device with image quality compensation

본 내용은 요부공개 건이므로 전문내용을 수록하지 않았음Since this is an open matter, no full text was included.

제3A도는 본 발명에 의한 화질보상 기능을 갖는 SECAM 방식 비디오 신호의 기록/재생장치의 일실시예를 도시한 블럭도, 제3B도는 본 발명에 의한 화질 보상 기능을 갖는 SECAM 방식 비디오 신호의 기록/재생장치의 다른 일실시예를 도시한 블럭도.FIG. 3A is a block diagram showing an embodiment of a recording / reproducing apparatus for a SECAM video signal having an image quality compensation function according to the present invention, and FIG. Block diagram showing another embodiment of the playback apparatus.

Claims (4)

복합 비디오 신호에서 휘도신호를 제거하고 색도신호만을 통과시키는 4.3MHz 대역통과필터; 상기 4.3MHz 대역통과필터를 통과한 색도신호를 강조하는 4.28MHz 벨필터; 상기 4.3MHz 대역통과필터의 출력과 버스트 게이트 펄스(BGP)와 상기 4.28 MHz벨필터의 출력을 입력하여 기준신호에 대한 버스트 레벨의 변동에 따라 색도신호의 크기를 증폭하는 화질보상회로; 상기 4.28MHz 벨필터의 출력을 입력하여 색도신호의 진폭을 일정하게 제한하고, 노이즈와 진폭변조부분을 제거하는 리미터; 및 상기 리미터에서 입력한 색도신호의 주파수를 저역변환하는 저역변환회로를 구비한 것을 특징으로 하는 화질보상 기능을 갖는 SECAM 방식 비디오 신호의 기록/재생장치.A 4.3 MHz bandpass filter for removing the luminance signal from the composite video signal and passing only the chroma signal; A 4.28 MHz bell filter for emphasizing the chroma signal passing through the 4.3 MHz band pass filter; An image quality compensation circuit for inputting an output of the 4.3 MHz band pass filter, a burst gate pulse (BGP), and an output of the 4.28 MHz bell filter to amplify the magnitude of the chroma signal according to a change in the burst level with respect to a reference signal; A limiter for inputting the output of the 4.28 MHz bell filter to constantly limit the amplitude of the chromaticity signal and to remove noise and amplitude modulation parts; And a low frequency conversion circuit for low frequency converting the frequency of the chromaticity signal inputted from the limiter. 방속국에서 수신된 복합 비디오 신호에서 휘도신호를 제거하고 색도신호만을 통과시키는 4.3MHz 대역통과필터; 상기 4.3MHz 대역통과필터를 통과한 색도신호를 강조하는 4.28MHz 벨필터; 상기 4.28MHz 벨필터에서 필터링된 색도신호를 입력하여 소정 크기로 증폭하는 증폭기; 상기 벨필터의 출력을 입력하여 색도신호의 진폭을 일정하게 제한하고, 노이즈와 진폭변조부분을 제거하는 리미터; 및 상기 리미터에서 입력한 색도신호의 주파수를 사분주하여 저역변환하는 저역변환회로를 구비한 것을 특징으로 하는 화질보상 기능을 갖는 SECAM 방식 비디오 신호의 기록/재생장치.A 4.3 MHz bandpass filter for removing the luminance signal from the composite video signal received from the broadcasting station and passing only the chroma signal; A 4.28 MHz bell filter for emphasizing the chroma signal passing through the 4.3 MHz band pass filter; An amplifier for inputting the chroma signal filtered by the 4.28 MHz bell filter and amplifying the same to a predetermined size; A limiter for inputting the output of the bell filter to constantly limit the amplitude of the chromaticity signal and to remove noise and amplitude modulation parts; And a low frequency conversion circuit for sub-dividing the frequency of the chromaticity signal inputted from the limiter to low frequency conversion. 제1항에 있어서, 상기 화질보상회로는 상기 4.3MHz 대역통과필터의 출력과 버스트 게이트 펄스를 입력하여 버스트 레벨에 따른 DC전압을 발생하는 버스트 레벨 검출기와, 상기 버스트 레벨 검출기의 출력전압과 상기 4.28MHz 벨필터의 출력을 입력하여 기준신호에 대한 버스트 레벨의 변동분에 따라 색도신호의 크기를 증폭하는 전압제어증폭기를 구비한 것을 특징으로 하는 화질보상 기능을 갖는 SECAM 방식 비디오 신호의 기록/재생장치.The image quality compensation circuit of claim 1, further comprising: a burst level detector configured to input an output of the 4.3 MHz band pass filter and a burst gate pulse to generate a DC voltage according to a burst level, and an output voltage of the burst level detector and the 4.28 signal. And a voltage control amplifier for inputting the output of the MHz bell filter to amplify the magnitude of the chroma signal according to the change in the burst level with respect to the reference signal. 제3항에 있어서, 상기 전압제어증폭기는 표준상태의 버스트 레벨과 상기 버스트 레벨과 상기 버스트 레벨검출기의 출력전압 차이를 증폭하는 것을 특징으로 하는 화질보상 기능을 갖는 SECAM 방식 비디오 신호의 기록/재생장치.4. The apparatus of claim 3, wherein the voltage control amplifier amplifies a burst level of a standard state and a difference between an output voltage of the burst level and the burst level detector. . ※ 참고사항 : 최초출원 내용에 의하여 공개하는 것임.※ Note: The disclosure is based on the initial application.
KR1019940040132A 1994-12-30 1994-12-30 A picture compensation with secam system video signal in writing and reproducing device KR0151018B1 (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
KR1019940040132A KR0151018B1 (en) 1994-12-30 1994-12-30 A picture compensation with secam system video signal in writing and reproducing device
JP7337432A JPH08251623A (en) 1994-12-30 1995-12-25 Recording/reproducing apparatus for secam video signal provided with image quality compensating function
FR9515569A FR2729035B1 (en) 1994-12-30 1995-12-27 SECAM VIDEO SIGNAL RECORDING / PLAYBACK EQUIPMENT WITH IMAGE QUALITY COMPENSATION FUNCTION
CN95121725A CN1104809C (en) 1994-12-30 1995-12-29 SECAM video signal recording/reproducing apparatus having function of picture quality compensation

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Application Number Priority Date Filing Date Title
KR1019940040132A KR0151018B1 (en) 1994-12-30 1994-12-30 A picture compensation with secam system video signal in writing and reproducing device

Publications (2)

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KR960025625A true KR960025625A (en) 1996-07-20
KR0151018B1 KR0151018B1 (en) 1998-10-15

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JP (1) JPH08251623A (en)
KR (1) KR0151018B1 (en)
CN (1) CN1104809C (en)
FR (1) FR2729035B1 (en)

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100598016B1 (en) * 2004-10-25 2006-07-06 삼성전자주식회사 Secam chrominance signal decoding method and secam chrominance signal decoder using the same
JP4983415B2 (en) * 2007-06-11 2012-07-25 ソニー株式会社 Image signal processing apparatus, image signal processing method, and program

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE791543A (en) * 1971-11-19 1973-03-16 Sony Corp MAGNETIC RECORDING SYSTEM OF A COMPOSITE COLOR TELEVISION SIGNAL
FR2160757B3 (en) * 1971-11-26 1974-08-19 Int Electronic Dist
US4220964A (en) * 1977-11-21 1980-09-02 Sony Corporation Secam recording and reproducing system
JPS5981990A (en) * 1982-11-02 1984-05-11 Victor Co Of Japan Ltd Color video signal recording device and recording and reproducing device
EP0626795B1 (en) * 1993-05-27 1999-07-21 Kabushiki Kaisha Toshiba SECAM chroma processing circuit including filters having a frequency-shiftable transmission characteristic

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FR2729035A1 (en) 1996-07-05
CN1104809C (en) 2003-04-02
CN1132977A (en) 1996-10-09
JPH08251623A (en) 1996-09-27
KR0151018B1 (en) 1998-10-15
FR2729035B1 (en) 1998-04-30

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