KR970004661A - Automatic Head Switching Servo Circuit and Method - Google Patents

Automatic Head Switching Servo Circuit and Method Download PDF

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Publication number
KR970004661A
KR970004661A KR1019950015405A KR19950015405A KR970004661A KR 970004661 A KR970004661 A KR 970004661A KR 1019950015405 A KR1019950015405 A KR 1019950015405A KR 19950015405 A KR19950015405 A KR 19950015405A KR 970004661 A KR970004661 A KR 970004661A
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KR
South Korea
Prior art keywords
signal
head
generating
sebum
automatic
Prior art date
Application number
KR1019950015405A
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Korean (ko)
Other versions
KR100194017B1 (en
Inventor
이병용
Original Assignee
김광호
삼성전자 주식회사
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Application filed by 김광호, 삼성전자 주식회사 filed Critical 김광호
Priority to KR1019950015405A priority Critical patent/KR100194017B1/en
Publication of KR970004661A publication Critical patent/KR970004661A/en
Application granted granted Critical
Publication of KR100194017B1 publication Critical patent/KR100194017B1/en

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Classifications

    • 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
    • G11B15/02—Control of operating function, e.g. switching from recording to reproducing
    • G11B15/12—Masking of heads; circuits for Selecting or switching of heads between operative and inoperative functions or between different operative functions or for selection between operative heads; Masking of beams, e.g. of light beams
    • G11B15/14—Masking or switching periodically, e.g. of rotating heads
    • 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
    • G11B15/02—Control of operating function, e.g. switching from recording to reproducing
    • G11B15/03—Control of operating function, e.g. switching from recording to reproducing by using counters
    • 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
    • G11B15/38—Driving record carriers by pneumatic means
    • G11B15/385—Driving record carriers by pneumatic means directly, e.g. by rotating drum
    • 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

Landscapes

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

Abstract

1. 청구 범위에 기재된 발명이 속한 기술분야1. TECHNICAL FIELD OF THE INVENTION

디지탈 비디오 카셀 레코더.Digital Video Kassel Recorder.

2. 발명이 해결하려고 하는 기술적 과제2. The technical problem to be solved by the invention

헤드 스위칭이 수동으로 이루어지는데 따른 제조공정상의 불편함을 해소하고자 한다.It is intended to alleviate inconveniences in the manufacturing process due to manual head switching.

3. 발명의 해결방법의 요지3. Summary of Solution to Invention

디지탈 비디오 카셋 레코더의 자동 헤드 스위칭 서보회로에 있어서, 헤드에 의해 테이프로부터 재생된 신호로부터 동기블럭영역의 시작을 검출하여 동기블럭시작신호를 발생하는 검출수단과, 소정의 제어를 받아 회전하며 상기 회전에 따른 피지 및 에프지신호를 발생하는 드럼 모터와, 헤드 자동 조절키를 입력하기 위한 키입력 수단과, 상기 헤드 자동 조절키의 입력에 응답하여 상기 피지신호의 검출로부터 상기 동기블럭시작신호가 검출되기까지의 시간을 카운트하는 카운트수단과, 상기 카운트수단에 의해 카운트된 시간 데이타에 따라 상기 헤드로 헤드스위칭신호를 발생하는 헤드스위칭신호발생수단과, 상기 피지신호와 상기 동기블럭시작신호를 비교하여 상기 카운트수단을 제어하는 비교수단으로 구성됨을 특징으로 한다.An automatic head switching servo circuit of a digital video cassette recorder, comprising: detecting means for detecting the start of a sync block area from a signal reproduced from a tape by a head and generating a sync block start signal, and rotating under predetermined control; The synchronizing block start signal from the detection of the sebum signal in response to an input of the drum motor for generating a sebum and fG signal, a key input means for inputting an automatic head adjustment key, and an automatic head adjustment key; A counting means for counting the time until it is completed, a head switching signal generating means for generating a head switching signal to the head according to the time data counted by the counting means, and the sebum signal and the synchronous block start signal are compared with each other. Characterized in that it comprises a comparison means for controlling the counting means.

4. 발명의 중요한 용도4. Important uses of the invention

헤드 스위칭을 자동화하는 데에 사용한다.Used to automate head switching.

Description

자동 헤드 스위칭 서보회로 및 방법Automatic Head Switching Servo Circuit and Method

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

제3도는 표준 테이프 포멧도, 제5도는 본 발명에 따른 헤드 스위칭 방법을 나타낸 흐름도.3 is a standard tape format diagram, and FIG. 5 is a flowchart illustrating a head switching method according to the present invention.

Claims (3)

자동 헤드 스위칭 서보회로에 있어서, 헤드에 의해 테이프로부터 재생된 신호로부터 동기블럭영역의 시작을 검출하여 동기블럭시작신호를 발생하는 검출수단과, 소정의 제어를 받아 회전하며 상기 회전에 따른 피지 및 에프지신호를 발생하는 드럼모터와, 헤드 자동 조절키를 입력하기 위한 키입력수단과, 상기 헤드 자동 조절키의 입력에 응답하여 상기 피지신호의 검출로부터 상기 동기블럭시작신호가 검출되기까지의 시간을 카운트하는 카운트수단과, 상기 카운트수단에 의해 카운트된 시간 데이타에 따라 상기 헤드로 헤드스위칭신호를 발생하는 헤드스위칭신호발생수단과, 상기 피지신호와 상기 동기블럭시작신호를 비교하여 상기 카운트수단을 제어하는 비교수단으로 구성됨을 특징으로 하는 회로.In the automatic head switching servo circuit, detecting means for detecting the start of the synchronous block area from the signal reproduced from the tape by the head and generating a synchronous block start signal, and rotating under predetermined control and sebum and f according to the rotation. A drum motor for generating an input signal, key input means for inputting an automatic head adjustment key, and a time from detection of the sebum signal to detection of the synchronous block start signal in response to input of the automatic head adjustment key; Counting means for counting, head switching signal generating means for generating a head switching signal to the head according to the time data counted by the counting means, and controlling the counting means by comparing the sebum signal and the synchronous block start signal. Circuit comprising a means for comparing. 제1항에 있어서, 상기 비교수단이, 수동 헤드조절시간을 수 마이크로 초 단위로 분할한 값을 갖는 자동 조절시간의 범위에 관한 데이타를 롬 테이블 형식으로 가짐을 특징으로 하는 회로.The circuit according to claim 1, wherein said comparing means has data relating to the range of automatic adjustment time having a value obtained by dividing the manual head adjustment time by several microseconds in a ROM table format. 드럼모터를 구비한 디지탈 비디오 카셋 레코더의 데이타 재생장치에서 헤드를 자동으로 스위칭하는 서보 방법에 있어서, 테이프를 재생시키는 제1과정과, 상기 테이프의 재생이 시작되면 헤드 자동 조절키의 입력 여부를 체크하는 제2과정과, 상기 헤드 자동 조절키의 입력을 감지하면 헤드에 의해 테이프에서 재생된 신호로부터 동기블럭영역의 시작을 검출하고 동기블럭시작신호를 발생하는 제3과정과, 드럼모터의 회전에 따른 피지신호와 상기 동기블럭시작신호의 발생시간차를 계산하고, 상기 동기블럭시작신호의 상스에지로부터 6.5H를 계산하는 제4과정과, 상기 계산된 시간 데이타에 따라 헤드스위칭신호를 발생하는 제5과정으로 이루어짐을 특징으로 하는 방법.A servo method for automatically switching a head in a data reproducing apparatus of a digital video cassette recorder having a drum motor, the servo method comprising: a first step of playing a tape, and checking whether a head automatic adjustment key is input when the tape is started; And a third step of detecting the start of the sync block area from the signal reproduced from the tape by the head and generating a sync block start signal when the input of the head automatic adjustment key is sensed, and the rotation of the drum motor. A fourth step of calculating a time difference between the sebum signal and the synchronous block start signal, and calculating 6.5H from the phase edge of the synchronous block start signal; and a fifth step of generating a head switching signal according to the calculated time data. Characterized by consisting of a process. ※ 참고사항 : 최초출원 내용에 의하여 공개하는 것임.※ Note: The disclosure is based on the initial application.
KR1019950015405A 1995-06-12 1995-06-12 Automatic Head Switching Servo Circuit and Method KR100194017B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1019950015405A KR100194017B1 (en) 1995-06-12 1995-06-12 Automatic Head Switching Servo Circuit and Method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1019950015405A KR100194017B1 (en) 1995-06-12 1995-06-12 Automatic Head Switching Servo Circuit and Method

Publications (2)

Publication Number Publication Date
KR970004661A true KR970004661A (en) 1997-01-29
KR100194017B1 KR100194017B1 (en) 1999-06-15

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Application Number Title Priority Date Filing Date
KR1019950015405A KR100194017B1 (en) 1995-06-12 1995-06-12 Automatic Head Switching Servo Circuit and Method

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