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KR920013269A - Dynamic tracking device and method using error flag signal - Google Patents

Dynamic tracking device and method using error flag signal Download PDF

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Publication number
KR920013269A
KR920013269A KR1019900022479A KR900022479A KR920013269A KR 920013269 A KR920013269 A KR 920013269A KR 1019900022479 A KR1019900022479 A KR 1019900022479A KR 900022479 A KR900022479 A KR 900022479A KR 920013269 A KR920013269 A KR 920013269A
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KR
South Korea
Prior art keywords
signal
output
unit
error
error flag
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KR1019900022479A
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Korean (ko)
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KR940009171B1 (en
Inventor
박찬영
김계종
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강진구
삼성전자 주식회사
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Application filed by 강진구, 삼성전자 주식회사 filed Critical 강진구
Priority to KR1019900022479A priority Critical patent/KR940009171B1/en
Priority to FR9114645A priority patent/FR2671443B1/en
Priority to DE4139188A priority patent/DE4139188A1/en
Priority to JP03316185A priority patent/JP3123793B2/en
Priority to GB9125505A priority patent/GB2252639B/en
Publication of KR920013269A publication Critical patent/KR920013269A/en
Application granted granted Critical
Publication of KR940009171B1 publication Critical patent/KR940009171B1/en

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Classifications

    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B5/00—Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
    • G11B5/48—Disposition or mounting of heads or head supports relative to record carriers ; arrangements of heads, e.g. for scanning the record carrier to increase the relative speed
    • G11B5/58—Disposition or mounting of heads or head supports relative to record carriers ; arrangements of heads, e.g. for scanning the record carrier to increase the relative speed with provision for moving the head for the purpose of maintaining alignment of the head relative to the record carrier during transducing operation, e.g. to compensate for surface irregularities of the latter or for track following
    • G11B5/584—Disposition or mounting of heads or head supports relative to record carriers ; arrangements of heads, e.g. for scanning the record carrier to increase the relative speed with provision for moving the head for the purpose of maintaining alignment of the head relative to the record carrier during transducing operation, e.g. to compensate for surface irregularities of the latter or for track following for track following on tapes
    • G11B5/588—Disposition or mounting of heads or head supports relative to record carriers ; arrangements of heads, e.g. for scanning the record carrier to increase the relative speed with provision for moving the head for the purpose of maintaining alignment of the head relative to the record carrier during transducing operation, e.g. to compensate for surface irregularities of the latter or for track following for track following on tapes by controlling the position of the rotating heads
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B5/00—Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
    • G11B5/48—Disposition or mounting of heads or head supports relative to record carriers ; arrangements of heads, e.g. for scanning the record carrier to increase the relative speed
    • G11B5/58—Disposition or mounting of heads or head supports relative to record carriers ; arrangements of heads, e.g. for scanning the record carrier to increase the relative speed with provision for moving the head for the purpose of maintaining alignment of the head relative to the record carrier during transducing operation, e.g. to compensate for surface irregularities of the latter or for track following
    • G11B5/584—Disposition or mounting of heads or head supports relative to record carriers ; arrangements of heads, e.g. for scanning the record carrier to increase the relative speed with provision for moving the head for the purpose of maintaining alignment of the head relative to the record carrier during transducing operation, e.g. to compensate for surface irregularities of the latter or for track following for track following on tapes

Landscapes

  • Adjustment Of The Magnetic Head Position Track Following On Tapes (AREA)
  • Television Signal Processing For Recording (AREA)

Abstract

내용 없음No content

Description

에러플래그 신호를 이용한 다이내믹 트래킹장치 및 방식Dynamic tracking device and method using error flag signal

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

제3도는 본 발명에 의한 다이내믹 트래킹장치의 구성도, 제4도는 본 발명의 영상신호 절환부의 구성도 및 동작표.3 is a configuration diagram of a dynamic tracking device according to the present invention, and FIG. 4 is a configuration diagram and an operation table of a video signal switching unit of the present invention.

Claims (5)

디지틀 비데오 테이프 레코더의 재생시스템에 있어서, 비데오 테이프에 자화된 상태로 저장되어 있는 신호를 드럼의 헤드를 통하여 받아서 전기적인 신호로 변환시키는 신호재생부(10)와, 상기 신호재생부(10)에서 전기적인 신호로 재생된 신호중에 포함되어 있는 지터(Jitter)를 감소시키는 시간축오차정정부(20)와, 상기 시간축오차정정부(20)에서 출력되는 신호중에서 일정한 패턴을 갖는 동기신호를 감지하여 재생된 신호를 기록전의 병렬신호로 정렬시키는 동기검출부(30)와, 상기 동기검출부(30)에서 출력되는 재생신호에 포함된 에러신호들중 소정코드워드당 정정할 수 있는 에러신호는 정정하고 그 이상의 에러신호에 대한 에러플래그신호를 발생시키는 제1에러정정 디코더부(40)와, 상기 제1에러정정 디코더부(40)에서 출력되는 비스트 형태의 에러신호를 랜덤에러신호로 바꾸는 디셔플링부(50)와, 상기 디셔플링부(50)에서 출력되는 램덤에러신호들중 코드워드당 정정할 수 있는 에러신호를 정정하고 그 이상의 에러신호에 대한 에러플래그신호를 발생시키는 제2에러정정 디코더부(60)와, 상기 제1, 및 제2에러정정디코더부(40, 60)에서 각기 전송되는 에러플래그신호를 모드 선택신호로 선택하여 출력하는 멀티플렉서부(70)와, 상기 멀티플렉서부(70)에서 선택된 에러플래그 신호를 미리 설정된 기준값과 비교하여 에러플래그신호가 기준값 보다 클경우 헤드위치 제어신호를 출력하는 시스템 콘트롤러(80)와, 상기 시스템 콘트롤러(80)에서 출력되는 헤드위치 제어신호에 의해서 헤드의 위치를 변경하도록 구동신호를 헤드에 출력시키는 헤드위치구동부(90)와, 상기 제2에러 정정디코더부(60)에서 출력되는 정보량이 압축된 영상신호를 신장시키는 데이터 보간부(100)와, 에러플래그신호가 발생된 화소 또는 블록에 대하여 소정프레임전의 영상신호를 내부의 프레임 메모리로 부터 출력하고 에러플래그신호가 발생하지 않은 영상신호는 데이타보간부(100)에서 받아서 출력하는 영상신호절환부(110)와, 상기 영상신호절환부(110)에서 각기 출력되는 디지틀 영상신호를 아날로그 영상신호로 변환하여 모니터세트(MS)에 전송하는 디지틀/아날로그신호변환부(120)를 포함함을 특징으로 하는 에러플래그신호를 이용한 다이내믹 트래킹장치.In a playback system of a digital video tape recorder, a signal reproducing unit (10) for receiving a signal stored in a magnetized state on a video tape through an drum head and converting the signal into an electrical signal, and the signal reproducing unit (10) Detects and reproduces a synchronization signal having a predetermined pattern among the time axis error correction unit 20 for reducing jitter included in the signal reproduced as the electrical signal and the signal output from the time axis error correction unit 20. The synchronous detection unit 30 which aligns the received signal with the parallel signal before recording, and the error signals that can be corrected per predetermined code word among the error signals included in the reproduction signal output from the synchronous detection unit 30 are corrected. A first error correction decoder unit 40 generating an error flag signal with respect to an error signal, and an error signal in the form of a beast output from the first error correction decoder unit 40. A deshuffling unit 50 for converting a random error signal into a random error signal, and an error signal that can be corrected for each codeword among random error signals output from the deshuffling unit 50, and an error flag signal for an error signal higher than that. The second error correction decoder unit 60 for generating a signal and the multiplexer unit 70 for selecting and outputting error flag signals transmitted from the first and second error correction decoder units 40 and 60 as mode selection signals, respectively. And the system controller 80 which outputs a head position control signal when the error flag signal is larger than the reference value by comparing the error flag signal selected by the multiplexer unit 70 with a preset reference value. Head position driving unit 90 for outputting a drive signal to the head to change the position of the head according to the output head position control signal, and the positive output from the second error correction decoder unit 60 The data interpolation unit 100 which extends the compressed video signal and the video signal before the predetermined frame are output from the internal frame memory to the pixel or block where the error flag signal is generated, and the error flag signal is not generated. The video signal switching unit 110 receives and outputs the data interpolation unit 100, and converts the digital video signals respectively output from the video signal switching unit 110 into analog video signals and transmits them to the monitor set MS. Dynamic tracking device using an error flag signal, characterized in that it comprises a digital / analog signal converter (120). 제1항에 있어서, 상기 시스템 콘트롤러(80)는 멀티플렉서부(70)의 출력신호를 클럭단자에 공급하여 카운팅하는 카운터(81)와, 상기 카운터(81)에서 카운팅된 출력값을 입력하여 미리 설정되어 있는 기준값과 비교하는 비교기(82)와, 상기 비교기(82)에서 미리 설정되어 있는 기준값 보다 카운터(81)의 출력값이 커질 경우 제어신호를 출력하는 헤드위치제어부(84)로 구성함을 특징으로 하는 에러플래그 신호를 이용한 다이내믹 트래킹장치.The counter of claim 1, wherein the system controller 80 is set in advance by inputting a counter 81 for supplying and counting an output signal of the multiplexer unit 70 to a clock terminal and an output value counted by the counter 81. And a head position control unit 84 for outputting a control signal when the output value of the counter 81 becomes larger than the reference value preset by the comparator 82, and the comparator 82 for comparing the reference value. Dynamic tracking device using an error flag signal. 제2항에 있어서, 상기 카운터(81)는 수직동기 신호와 상기 비교기(82)의 출력에 의해 초기화(Clear, Reset)되는 것을 특징으로 하는 에러플래그 신호를 이용한 다이내믹 트래킹장치.3. The dynamic tracking device according to claim 2, wherein the counter (81) is initialized by a vertical synchronization signal and an output of the comparator (82). 제1항에 있어서, 상기 영상신호절환부(110)는 데이타 보간부(100)의 출력신호를 지연시키는 프레임지연 메모리와, 상기 데이타보간부(100)의 출력신호와 상기 프레임지연 메모리의 출력신호를 제2에러정정디코더부(60)의 에러플래그 신호에 의해 절환 출력하는 멀티플렉서(MUX2)와, 상기 멀티플렉서(MUX2)의 출력신호와 상기 데이터보간부(100)의 출력신호를 제2에러정정디코더부(60)의 에러플래그 신호에 의해 절환하여 프레임 메모리에 저장되도록 제공하는 멀티플렉서(MUX1)을 포함하여 이루어짐을 특징으로 하는 에러플래그 신호를 이용한 다이내믹 트래킹장치.According to claim 1, The image signal switching unit 110 is a frame delay memory for delaying the output signal of the data interpolator 100, the output signal of the data interpolator 100 and the output signal of the frame delay memory The output signal of the multiplexer (MUX2) and the output signal of the multiplexer (MUX2) and the output signal of the data interpolator (100) are converted into output signals by the error flag signal of the second error correction decoder (60). And a multiplexer (MUX1) provided to be switched to the error flag signal of the unit 60 and stored in the frame memory. 부호화된 압축 디지틀 데이타를 재생하는 재생장치의 트래킹제어 방식에 있어서, 복호시에 발생하는 에러플래그 신호를 카운팅하는 에러플래그 카운팅 단계와, 상기 에러플래그 카운팅 단계에서 카운팅된 출력과 미리 설정된 비교값을 비교하는 비교단계와, 상기 비교단계의 비교출력에 의해 재생헤드의 위치를 수정하여 다이내믹트래킹을 수행하는 헤드제어단계를 포함함을 특징으로 하는 에러플래그 신호를 이용한 다이내믹 트래킹방식.In the tracking control method of a playback apparatus for reproducing encoded compressed digital data, an error flag counting step of counting an error flag signal generated during decoding, and an output counted in the error flag counting step and a preset comparison value are compared. And a head control step of performing dynamic tracking by correcting the position of the playhead by the comparison output of the comparing step. ※ 참고사항 : 최초출원 내용에 의하여 공개하는 것임.※ Note: The disclosure is based on the initial application.
KR1019900022479A 1990-12-29 1990-12-29 Dynamic tracking device and method using error flag signal KR940009171B1 (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
KR1019900022479A KR940009171B1 (en) 1990-12-29 1990-12-29 Dynamic tracking device and method using error flag signal
FR9114645A FR2671443B1 (en) 1990-12-29 1991-11-27 DYNAMIC SEARCH DEVICE AND METHOD USING AN ERROR FLAG SIGNAL.
DE4139188A DE4139188A1 (en) 1990-12-29 1991-11-28 DEVICE AND METHOD FOR DYNAMIC TRACKING
JP03316185A JP3123793B2 (en) 1990-12-29 1991-11-29 Dynamic tracking device using error flag signal
GB9125505A GB2252639B (en) 1990-12-29 1991-11-29 Dynamic tracking apparatus and method using an error flag signal

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1019900022479A KR940009171B1 (en) 1990-12-29 1990-12-29 Dynamic tracking device and method using error flag signal

Publications (2)

Publication Number Publication Date
KR920013269A true KR920013269A (en) 1992-07-28
KR940009171B1 KR940009171B1 (en) 1994-10-01

Family

ID=19308980

Family Applications (1)

Application Number Title Priority Date Filing Date
KR1019900022479A KR940009171B1 (en) 1990-12-29 1990-12-29 Dynamic tracking device and method using error flag signal

Country Status (5)

Country Link
JP (1) JP3123793B2 (en)
KR (1) KR940009171B1 (en)
DE (1) DE4139188A1 (en)
FR (1) FR2671443B1 (en)
GB (1) GB2252639B (en)

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS54113308A (en) * 1978-02-23 1979-09-04 Sony Corp Tracking device for magnetic head
JPS56156924A (en) * 1980-05-08 1981-12-03 Sony Corp Track following device
DE3344508A1 (en) * 1983-12-09 1985-06-20 Robert Bosch Gmbh, 7000 Stuttgart Method for tracking-error detection during the reproduction of digitally coded signals, and circuit arrangement therefor
DE3704718A1 (en) * 1987-02-14 1988-08-25 Thomson Brandt Gmbh DEVICE FOR PLAYING BACK DATA
US4947272A (en) * 1987-03-30 1990-08-07 Pioneer Electronic Corporation Signal reproducing device which offsets the tracking error signal for a digital tape player
DE3809688A1 (en) * 1988-03-23 1989-10-12 Broadcast Television Syst METHOD FOR ADJUSTING THE TRACK POSITION IN A MAGNETIC TAPE DEVICE

Also Published As

Publication number Publication date
DE4139188A1 (en) 1992-07-23
JP3123793B2 (en) 2001-01-15
FR2671443B1 (en) 1994-09-23
GB2252639A (en) 1992-08-12
FR2671443A1 (en) 1992-07-10
KR940009171B1 (en) 1994-10-01
JPH04341914A (en) 1992-11-27
DE4139188C2 (en) 1992-12-17
GB2252639B (en) 1995-02-08
GB9125505D0 (en) 1992-01-29

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