KR960030169A - V-Cal's Tape Speed Compensation Method and Device - Google Patents

V-Cal's Tape Speed Compensation Method and Device Download PDF

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Publication number
KR960030169A
KR960030169A KR1019950000359A KR19950000359A KR960030169A KR 960030169 A KR960030169 A KR 960030169A KR 1019950000359 A KR1019950000359 A KR 1019950000359A KR 19950000359 A KR19950000359 A KR 19950000359A KR 960030169 A KR960030169 A KR 960030169A
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KR
South Korea
Prior art keywords
mode
capstan
speed
high frequency
comparing
Prior art date
Application number
KR1019950000359A
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Korean (ko)
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KR0141728B1 (en
Inventor
손영태
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구자홍
Lg 전자 주식회사
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Priority to KR1019950000359A priority Critical patent/KR0141728B1/en
Publication of KR960030169A publication Critical patent/KR960030169A/en
Application granted granted Critical
Publication of KR0141728B1 publication Critical patent/KR0141728B1/en

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    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B15/00—Driving, starting or stopping record carriers of filamentary or web form; Driving both such record carriers and heads; Guiding such record carriers or containers therefor; Control thereof; Control of operating function
    • G11B15/18—Driving; Starting; Stopping; Arrangements for control or regulation thereof
    • G11B15/1808—Driving of both record carrier and head
    • G11B15/1875—Driving of both record carrier and head adaptations for special effects or editing
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B2220/00—Record carriers by type
    • G11B2220/90—Tape-like record carriers

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  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Indexing, Searching, Synchronizing, And The Amount Of Synchronization Travel Of Record Carriers (AREA)

Abstract

본 발명은 브이씨알의 테이프 속도 보상 방법 및 장치에 관한 것으로, 종래에는 표준모드(SP) 또는 1/2모드(LP) 변속시 고주파의 포락선 신호를 검출한 다음 크기를 평균한 후 기준값과 비교하여 크고 작음에 따라 속도 모드를 판별하는 방식으로, 표준모드(SP)인 경우 고주파값이 작거나 1/2모드(LP)인 경우 고주파 값이 크면 기준값과 비교함에 의해 변속 모드 판별에 오류가 발생하게 되고 또한 , 테이프의 기록 고주파량이 적정값이라도 기준 전압의 변동폭이 클 경우에는 모드 판별에 오류가 발생하게 된다. 이러한 점을 해결하기 위하여 본 발명은 종래의 문제점을 해결하기 위하여 8mm 재생 중 전진 고속 전진 재생(CUE)이나 고속 후진 재생(REV)과 같은 변속 재생시 헤드시위칭 기간동안 고주파 펄스를 계수하여 기준수와 비교함에의해 변속 모드를 판단하고 그 판단모드로 데크를 구동하도록 창안한 것으로, 본 발명은 변속으로 8mm 재생 중 소정 기간동안의 캡스턴펄스의 수를 계수하여 기준값과 비교함으로써 정확한 속도 모드를 판단하여 해당 모드의 속도로 동작시킴에의해 오동작을 방지하여 양호한 화면을 제공할 수 있다.The present invention relates to a tape speed compensation method and apparatus of V-Cal. In the related art, a high frequency envelope signal is detected during standard mode (SP) or 1/2 mode (LP) shifting, and then averaged and compared with a reference value. If the high frequency value is small in the standard mode (SP) or the high frequency value is large in the 1/2 mode (LP), the speed mode is determined by comparing with the reference value. Further, even if the recording high frequency amount of the tape is a proper value, an error occurs in mode discrimination when the variation of the reference voltage is large. In order to solve this problem, the present invention solves the conventional problem by counting the high frequency pulse during the head-switching period during shift playback such as fast forward fast forward (CUE) or fast reverse fast forward (REV). In accordance with the present invention, the shift mode is determined and the deck is driven in the determination mode. The present invention counts the number of capstan pulses for a predetermined period of 8 mm during the shift and determines the correct speed mode by comparing with the reference value. By operating at the speed of the mode, a malfunction can be prevented and a good screen can be provided.

Description

브이씨알의 테이프 속도 보상 방법 및 장치V-Cal's Tape Speed Compensation Method and Device

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

제2도는 본 발명의 장치 블럭도, 제5도는 본 발명의 테이프 속도 판별을 위한 신호 흐름도.2 is a device block diagram of the present invention, and FIG. 5 is a signal flow diagram for determining the tape speed of the present invention.

Claims (5)

헤드 스위칭 신호를 기준으로 계수한 캡스턴 펄스의 수를 기준값으로 설정하여 변속 재생시 입력되는 캡스턴 펄스의 수를 비교하는 제1단계와, 헤드 스위칭 구간 동안 고주파 구형 펄스를 계수하여 모드 속도에 다른 기준값과 비교하는 제2단계와, 상기 제1, 제2단계에서 허용치 이상의 오차가 발생하면 모드 에러로 판별하여 캡스턴 속도를 조정하는 제3단계를 수행하는 브이씨알의 테이프 속도 보상 방법.A first step of comparing the number of capstan pulses input during shift reproduction by setting the number of capstan pulses counted on the basis of the head switching signal as a reference value; And a second step of comparing and a third step of adjusting a capstan speed by determining a mode error when an error of more than a tolerance occurs in the first and second steps. 제1항에 있어서, 헤드 스위칭 구간동안 계수한 펄스의 수가 기준값보다 일정 시간 적음을 판별하면 표준모드(SP)의 에러로 판별하여 캡스턴 속도를 증가시키는 것을 특징으로 하는 브이씨알의 테이프 속도 보상 방법.The method of claim 1, wherein if it is determined that the number of pulses counted during the head switching period is less than the reference value for a predetermined time, the capstan speed is increased by judging it as an error of the standard mode (SP). 제1항에 있어서, 헤드 스위칭 구간동안 계수한 펄스의 수가 기준값보다 일정 시간 많음을 판별하면 1/2모드(LP)의 에러로 판별하여 캡스턴 속도를 감소시키는 것을 특징으로 하는 브이씨알의 테이프 속도 보상방법.[2] The tape speed compensation of V-Cal according to claim 1, wherein if the number of pulses counted during the head switching period is greater than the reference value for a predetermined time, the capstan speed is reduced by determining the error in the 1/2 mode LP. Way. 헤드 스위칭 구간동안 고주파의 구형 펄스를 모드 속도에 따른 기준값과 비교하고 입력 캡스턴 펄스의 수를 헤드 스위칭 신호를 기준으로 계수한 캡스턴 펄스의 수와 비교하는 수단과, 상기 비교 동작에 의한 신호를 점검하여에러 유무를 판별하는 수단과, 상기 에러 유무의 판별에 따라 캡스턴의 속도를 조정하는 수단으로 이루어진 브이씨알의 테이프 속도 보상 장치.Means for comparing the high frequency square pulse with the reference value according to the mode speed during the head switching period, and comparing the number of input capstan pulses with the number of capstan pulses counted based on the head switching signal, and the signal by the comparing operation And a means for determining the presence or absence of an error and a means for adjusting the speed of the capstan in accordance with the determination of the presence or absence of the error. 제6항에 이어서, 상기 비교 수단은 입력 고주파의 포락선 신호를 검출하는 포락선 검출부와, 이 포락선 검출부의 출력을 구형 펄스로 변환하는 구형파 발생부와, 입력 캡스턴 펄스의 수를 헤드 스위칭 신호를 기준으로 계수한 캡스턴 펄스의 수와 비교하고 헤드 스위칭 펄스 구간동안 계수한 고주파 펄스의 수를 모드 속도에 따른 기준값과 비교하여 상기 비교 동작에서 허용치 이상의 오차가 발생하는 판별하는 비교부로 구성한 것을 특징으로 하는 브이씨알의 테이프 속도 보상 장치.8. The comparison means comprises: an envelope detector for detecting an envelope signal of an input high frequency, a square wave generator for converting an output of the envelope detector into a square pulse, and the number of input capstan pulses based on the head switching signal. Vr comparing the number of capstan pulses counted and the number of high frequency pulses counted during the head switching pulse period with the reference value according to the mode speed to determine whether an error of more than a tolerance occurs in the comparison operation. Tape speed compensation device. ※ 참고사항 : 최초출원 내용에 의하여 공개하는 것임.※ Note: The disclosure is based on the initial application.
KR1019950000359A 1995-01-10 1995-01-10 Tape speed compensation method device of vcr KR0141728B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1019950000359A KR0141728B1 (en) 1995-01-10 1995-01-10 Tape speed compensation method device of vcr

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1019950000359A KR0141728B1 (en) 1995-01-10 1995-01-10 Tape speed compensation method device of vcr

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KR960030169A true KR960030169A (en) 1996-08-17
KR0141728B1 KR0141728B1 (en) 1998-07-15

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100253184B1 (en) * 1997-06-27 2000-05-01 구자홍 Reproducing speed decision method for optical disc
KR100417008B1 (en) * 2001-06-12 2004-02-05 주식회사 대우일렉트로닉스 Apparatus for controlling capstan motor in a time lapse vcr

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100253184B1 (en) * 1997-06-27 2000-05-01 구자홍 Reproducing speed decision method for optical disc
KR100417008B1 (en) * 2001-06-12 2004-02-05 주식회사 대우일렉트로닉스 Apparatus for controlling capstan motor in a time lapse vcr

Also Published As

Publication number Publication date
KR0141728B1 (en) 1998-07-15

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