KR960032430A - DVCR data recovery device - Google Patents

DVCR data recovery device Download PDF

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Publication number
KR960032430A
KR960032430A KR1019950002610A KR19950002610A KR960032430A KR 960032430 A KR960032430 A KR 960032430A KR 1019950002610 A KR1019950002610 A KR 1019950002610A KR 19950002610 A KR19950002610 A KR 19950002610A KR 960032430 A KR960032430 A KR 960032430A
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KR
South Korea
Prior art keywords
sample
output
delay
data
unit
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KR1019950002610A
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Korean (ko)
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KR100339347B1 (en
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이상문
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구자홍
Lg 전자 주식회사
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Priority to KR1019950002610A priority Critical patent/KR100339347B1/en
Publication of KR960032430A publication Critical patent/KR960032430A/en
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Publication of KR100339347B1 publication Critical patent/KR100339347B1/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
    • G11B20/10—Digital recording or reproducing
    • G11B20/10009—Improvement or modification of read or write signals
    • G11B20/10268—Improvement or modification of read or write signals bit detection or demodulation methods
    • G11B20/10287—Improvement or modification of read or write signals bit detection or demodulation methods using probabilistic methods, e.g. maximum likelihood detectors
    • 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
    • G11B20/10—Digital recording or reproducing
    • G11B20/18—Error detection or correction; Testing, e.g. of drop-outs

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  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Physics & Mathematics (AREA)
  • Probability & Statistics with Applications (AREA)
  • Signal Processing For Digital Recording And Reproducing (AREA)

Abstract

본 발명은 디지털 신호의 자기기록재생시 노이즈 및 타이밍 에러에 의한 오검출을 최소화하도록 한 DVCR의 데이터 복원장치에 관한 것이다.The present invention relates to an apparatus for restoring a data of a DVCR, which minimizes false detection by noise and timing errors during magnetic recording and reproduction of digital signals.

종래의 기술은 타이밍 지터에 의한 타이밍 에러로 인해 데이터의 오검출을 유발하게 되며, 샘플링 순간에 데이터가 노이즈에 의해 오검출될 가능성을 내포하고 있던 점을 감안하여 본 발명은 DVCR의 데이터 복원장치에 있어서, 재생신호의 클럭복원출력을 각각 서로 다른 딜레이 타임으로 딜레이하는 복수개의 딜레이부, 재생신호의 정류출력을 상기 딜레이부로부터의 각각의 클럭을 이용하여 샘플링하는 복수개의 샘플 앤드 홀드부, 상기 샘플 앤드 홀드부의 각 샘플들의 딜레이 타임을 맞추기 위해 샘플 앤드 홀드부의 출력을 딜레이하는 복수개의 역 딜레이부, 상기 역 딜레이부의 출력을 가산하는 가산기, 상기 가산기의 출력을 설정된 기준전압과 비교하는 비교기를 구비하거나 상기 가산기 및 비교기 대신에 상기 역 딜레이부의 출력을 설정된 기준전압과 비교하는 복수개의 비교기, 상기 비교기의 출력신호중 가장 가능성이 큰쪽을 선택하여 출력하는 데이터 판별부를 구비하여 동일 클럭을 이용하여 3개 이상의 샘플을 취해 그 샘플값들을 평균하여 일정 레벨로 비교함으로써 타이밍 에러에 의한 데이터의 오검출과 노이즈에 의한 데이터의 오검출을 최소화 할 수 있도록 한 것이다. 그리고 본 발명은 디지털 자기기록재생시스템에서 재생신호처리뿐만 아니라 다른 매체의 신호처리에도 적용가능하다.In the related art, the timing error caused by timing jitter causes data to be misdetected, and the present invention implies that data may be misdetected by noise at the instant of sampling. A plurality of delay units for delaying the clock recovery output of the reproduction signal with different delay times, and a plurality of sample and hold units for sampling the rectified output of the reproduction signal using the respective clocks from the delay unit, the sample A plurality of inverse delay units for delaying the output of the sample and hold unit, an adder for adding the outputs of the inverse delay unit, and a comparator for comparing the output of the adder with a set reference voltage to match the delay time of each sample of the end hold unit; Reference for setting the output of the inverse delay unit instead of the adder and the comparator A plurality of comparators for comparing voltages and a data discrimination unit for selecting and outputting the most probable ones among the output signals of the comparators are provided to take three or more samples using the same clock, and average the sample values to compare them at a predetermined level. It is designed to minimize data misdetection due to errors and data misdetection due to noise. In addition, the present invention is applicable to signal processing of other media as well as reproduction signal processing in a digital magnetic recording and reproducing system.

Description

디브이씨알(DVCR)의 데이터 복원장치DVCR data recovery device

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

제7도는 본 발명에 따른 DVCR의 데이터 복원장치의 제1실시예도,7 is a first embodiment of a data recovery apparatus for DVCR according to the present invention;

제8도는 제7도의 구체 실시예도,8 is a specific embodiment of FIG.

제9도는 본 발명에 따른 DVCR의 데이터 복원장치의 제2실시예도.9 is a second embodiment of a data recovery apparatus for DVCR according to the present invention.

Claims (2)

DVCR의 데이터 복원장치에 있어서, 재생신호의 클럭복원출력을 각각 서로 다른 딜레이 타임으로 딜레이하는 복수개의 딜레이부와, 재생신호의 정류출력을 상기 딜레이부로부터의 각각의 클럭을 이용하여 샘플링하는 복수개의 샘플 앤드 홀드부와, 상기 샘플 앤드 홀드부에 의해 샘플링된 각 샘플링의 딜레이 타임을 맞추기 위해 샘플 앤드 홀드부의 출력을 딜레이하는 복수개의 역 딜레이부와, 상기 역 딜레이부의 출력을 가산하는 가산기와, 상기 가산기의 출력을 설정된 기준전압과 비교하는 비교기를 구비함을 특징으로 하는 DVCR의 데이터 복원장치.A data recovery apparatus of a DVCR, comprising: a plurality of delay units for delaying clock recovery outputs of a reproduction signal at different delay times, and a plurality of samples for sampling the rectified output of the reproduction signals using respective clocks from the delay units; A sample and hold section, a plurality of inverse delay sections for delaying the output of the sample and hold sections to match the delay times of the samplings sampled by the sample and hold section, an adder for adding the outputs of the inverse delay section, and And a comparator for comparing the output of the adder with a set reference voltage. DVCR의 데이터 복원장치에 있어서, 재생신호의 클럭복원출력을 각각 서로 다른 딜레이 타임으로 딜레이 하는 복수개의 딜레이부와, 재생신호의 정류출력을 상기 딜레이부로부터의 각각의 클럭을 이용하여 샘플링하는 복수개의 샘플 앤드 홀드부와, 상기 샘플 앤드 홀드부에 의해 샘플링된 각 샘플들의 딜레이 타임을 맞추기 위해 샘플 앤드 홀드부의 출력을 딜레이하는 복수개의 역 딜레이부와, 상기 역 딜레이부의 출력을 설정된 기준 전압과 비교하는 복수개의 비교기와, 상기 비교기의 출력신호중 가장 가능성이 큰쪽을 선택하여 출력하는 데이터 판별부를 구비함을 특징으로 하는 DVCR의 데이터 복원장치.A data recovery apparatus of a DVCR, comprising: a plurality of delay units for delaying clock recovery outputs of a reproduction signal at different delay times, and a plurality of sampling units for rectifying output of the reproduction signals using respective clocks from the delay units; A plurality of inverse delay units for delaying an output of the sample and hold unit to adjust a sample and hold unit and a delay time of each sample sampled by the sample and hold unit, and comparing the outputs of the inverse delay unit with a set reference voltage. And a plurality of comparators and a data discriminating unit for selecting and outputting the most probable one of the output signals of the comparator. ※ 참고사항 : 최초출원 내용에 의하여 공개하는 것임.※ Note: The disclosure is based on the initial application.
KR1019950002610A 1995-02-13 1995-02-13 Data recovering device for dvcr KR100339347B1 (en)

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KR1019950002610A KR100339347B1 (en) 1995-02-13 1995-02-13 Data recovering device for dvcr

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Application Number Priority Date Filing Date Title
KR1019950002610A KR100339347B1 (en) 1995-02-13 1995-02-13 Data recovering device for dvcr

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KR960032430A true KR960032430A (en) 1996-09-17
KR100339347B1 KR100339347B1 (en) 2002-11-30

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100436096B1 (en) * 1995-12-26 2004-08-18 모토로라 인코포레이티드 Signal processing method

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100436096B1 (en) * 1995-12-26 2004-08-18 모토로라 인코포레이티드 Signal processing method

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