KR940022446A - Auto tracking error detection signal level automatic adjustment method and device - Google Patents
Auto tracking error detection signal level automatic adjustment method and device Download PDFInfo
- Publication number
- KR940022446A KR940022446A KR1019930003318A KR930003318A KR940022446A KR 940022446 A KR940022446 A KR 940022446A KR 1019930003318 A KR1019930003318 A KR 1019930003318A KR 930003318 A KR930003318 A KR 930003318A KR 940022446 A KR940022446 A KR 940022446A
- Authority
- KR
- South Korea
- Prior art keywords
- signal
- level
- aft
- khz
- output
- Prior art date
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Classifications
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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
- G11B20/02—Analogue recording or reproducing
- G11B20/025—Error detection or correction
Abstract
본 발명은 브이 씨알(VCR)이나 캠코더들의 영상신호 기록 재생 장치에서 캡스턴 모터의 위상 제어를 위한 오토 트래킹 주파수(AFT; AUTO TRACKING FREQUENCY)의 에러를 검출함에 있어, 테이프에서 재생되는 파일롯(RILOT) 신호의 검출 레벨을 증폭의 이득 조절을 통해 제어하여 항상 일정한 레벨로 AFT에런 신호가 검출되도록 자동적으로 조절하는 오토 트래킹 에러 검출 신호 레벨 자동 방법과 장치에 관한 것이다.The present invention provides a pilot signal reproduced from a tape in detecting an error of an auto tracking frequency (AFT) for controlling the phase of a capstan motor in a video signal recording and reproducing apparatus of a VCR or camcorders. A method and apparatus for auto-tracking error detection signal level automatic control of a detection level of a through the amplification gain adjustment to automatically adjust the AFT eron signal to be detected at a constant level at all times.
종래의 오토 트래킹 에러 신호 검출 장치에 의하면 헤드의 단차, 전치 증폭기의 재생 특성, 기록된 테이프의 기록 특성, 테이프의 기록모드(SP, LP)등에 따라 AFT에러 신호의 검출 레벨이 달라짐에도 불구하고 마이컴에서는 일정한 증폭도(이득)를 갖고 캡스턴 모터의 위상 제어를 수행하므로 최적의 위상 제어가 불가능하고, 또한 현재 비디오 헤드가 테이프의 각 트랙을 트레이스 함에 있어 동일한 미스 트래킹 량으로 트레이스 함에도 불구하고 서로 다른 제어량으로 캡스턴 모터의 위상을 제어하게 되어 화질과 음질의 악화가 초래되는 문제점이 있다.According to the conventional auto tracking error signal detection apparatus, even though the detection level of the AFT error signal varies depending on the step difference of the head, the reproduction characteristics of the preamplifier, the recording characteristics of the recorded tape, and the recording mode (SP, LP) of the tape, Does not achieve optimal phase control because it performs phase control of the capstan motor with constant amplification degree (gain), and different control amount even though the current video head traces each track of tape with the same miss tracking amount. As a result, the phase of the capstan motor is controlled to cause deterioration of image quality and sound quality.
본 발명은 AFT에러신호의 레벨을 실험적으로 구해놓은 최적의 캡스턴 위상 제어를 위한 최소값 및 최대값의 범위와 서로 비교하고 이 비교 결과에 따라 파일롯 신호의 검출 레벨을 상기 최적 제어 범위안에 들어오도록 증폭기의 이득을 제어 하므로서 헤드의 단차나 테이프의 기록 상태 또는 기록, 모드등에 구애됨이 없이 항상 일정한 레벨의 AFT신호 검출을 기하고, 이를 통한 캡스턴 모터의 정밀 위상 제어와 고화질 및 고음질의 신호 재생이 가능하도록 하는 것을 캠코더, VCR에 적용한다.The present invention compares the AFT error signal level with the range of minimum and maximum values for the optimal capstan phase control, which is experimentally obtained, and the gain of the amplifier to bring the detection level of the pilot signal into the optimum control range according to the comparison result. By controlling the AFT signal at any level, regardless of the level of the head, the recording status, the recording, and the mode of the head, the capstan motor enables precise phase control and high quality and high quality signal reproduction. Is applied to camcorders and VCRs.
Description
본 내용은 요부공개 건이므로 전문내용을 수록하지 않았음Since this is an open matter, no full text was included.
제1도는 종래의 오토 트래킹 에러 신호 검출 장치의 블록 구성도,1 is a block diagram of a conventional auto tracking error signal detection apparatus;
제2도는 본 발명의 오토 트래킹 에러 신호 검출 장치의 블록 구성도,2 is a block diagram of an auto tracking error signal detection apparatus of the present invention;
제3도는 본 발명의 오토 트래킹 에러 검출 신호 레벨 자동 조절 방법의 플로우 차트,3 is a flow chart of the automatic tracking error detection signal level automatic adjustment method of the present invention;
제4도는 본 발명에 의한 상기 제2도의 회로 각 부분에서의 파형도.4 is a waveform diagram of respective parts of the circuit of FIG.
Claims (2)
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
KR1019930003318A KR950007940B1 (en) | 1993-03-05 | 1993-03-05 | Auto-tracking control method & system |
US08/186,616 US5629814A (en) | 1993-01-27 | 1994-01-26 | Automatic tracking control apparatus and method |
CN94102663A CN1072426C (en) | 1993-01-27 | 1994-01-27 | Automatic tracking control apparatus and method |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
KR1019930003318A KR950007940B1 (en) | 1993-03-05 | 1993-03-05 | Auto-tracking control method & system |
Publications (2)
Publication Number | Publication Date |
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KR940022446A true KR940022446A (en) | 1994-10-20 |
KR950007940B1 KR950007940B1 (en) | 1995-07-21 |
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Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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KR1019930003318A KR950007940B1 (en) | 1993-01-27 | 1993-03-05 | Auto-tracking control method & system |
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Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR100251455B1 (en) * | 1997-04-30 | 2000-04-15 | 윤종용 | Tracking control apparatus |
KR20000044167A (en) * | 1998-12-30 | 2000-07-15 | 전주범 | Device and method for designing modeling in spw about digital vcr tape |
-
1993
- 1993-03-05 KR KR1019930003318A patent/KR950007940B1/en not_active IP Right Cessation
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR100251455B1 (en) * | 1997-04-30 | 2000-04-15 | 윤종용 | Tracking control apparatus |
KR20000044167A (en) * | 1998-12-30 | 2000-07-15 | 전주범 | Device and method for designing modeling in spw about digital vcr tape |
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Publication number | Publication date |
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KR950007940B1 (en) | 1995-07-21 |
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