KR900015108A - 4-head change over control circuit and method - Google Patents

4-head change over control circuit and method Download PDF

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Publication number
KR900015108A
KR900015108A KR1019890004114A KR890004114A KR900015108A KR 900015108 A KR900015108 A KR 900015108A KR 1019890004114 A KR1019890004114 A KR 1019890004114A KR 890004114 A KR890004114 A KR 890004114A KR 900015108 A KR900015108 A KR 900015108A
Authority
KR
South Korea
Prior art keywords
mode
head
switching
terminal
signal
Prior art date
Application number
KR1019890004114A
Other languages
Korean (ko)
Other versions
KR920004217B1 (en
Inventor
김경수
Original Assignee
강진구
삼성전자 주식회사
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 강진구, 삼성전자 주식회사 filed Critical 강진구
Priority to KR1019890004114A priority Critical patent/KR920004217B1/en
Priority to JP2010432A priority patent/JPH02288480A/en
Priority to GB9001512A priority patent/GB2229849B/en
Publication of KR900015108A publication Critical patent/KR900015108A/en
Application granted granted Critical
Publication of KR920004217B1 publication Critical patent/KR920004217B1/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
    • G11B15/18—Driving; Starting; Stopping; Arrangements for control or regulation thereof
    • G11B15/46—Controlling, regulating, or indicating speed
    • G11B15/467—Controlling, regulating, or indicating speed in arrangements for recording or reproducing wherein both record carriers and heads are driven
    • 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
    • G11B15/026—Control of operating function, e.g. switching from recording to reproducing by using processor, e.g. microcomputer
    • 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
    • G11B15/125—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 conditioned by the operating function of the apparatus
    • 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
    • G11B5/54—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 into or out of its operative position or across tracks
    • G11B5/55—Track change, selection or acquisition by displacement of the head

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Hardware Design (AREA)
  • Television Signal Processing For Recording (AREA)

Abstract

내용 없음.No content.

Description

4헤드 절환 제어회로 및 방법4-head change over control circuit and method

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

제1도는 본 발명에 따른 회로도,1 is a circuit diagram according to the present invention,

제2도는 본 발명에 헤드 스위치 펄스 인터럽트의 흐름도,2 is a flow chart of a head switch pulse interrupt in the present invention,

제3도는 본 발명에 엔벨로프 단자를 컨트롤하는 흐름도.3 is a flow chart for controlling the envelope terminal in the present invention.

Claims (2)

비디오 카세트 레코우더의 4헤드 절환회로에 있어서, 시스템과 타이머를 하나로 제어하는 마이컴(10)과, 상기 4헤드중 어느헤드를 읽을 것인가를 상기 마이컴(10) 제어에 의해 선택되어 로터리 스위칭 절환하는 제1스위칭 절환수단과, 상기 4헤드중 어느헤드를 읽을 것이가를 상기 마이컴(10) 제어에 의해 선택되어 헤드앰프 스위칭 절환을 하는 제2스위칭 절환수단과, 헤드가 어느채널을 긁고 있는가의 상태를 나타내는 엔벨로프 신호와 헤드 스위칭신호의 조합에 의해 상기 제1,2스위칭 절환수단을 제어하는 제어수단으로 구성함을 특징으로하는 4헤드 절환 제어회로.In the four-head switching circuit of a video cassette recorder, a microcomputer (10) for controlling a system and a timer and one of the four heads is selected by the microcomputer (10) control and rotary switching is switched. A first switching switching means, a second switching switching means selected by the control of the microcomputer 10 to read which of the four heads to read, and which channel the head is scratching. And control means for controlling said first and second switching switching means by a combination of an envelope signal and a head switching signal. 비디오 카세트 레코우더의 4헤드 절환방법에 있어서, 현재가 플레이모드이고 SP모드이면 헤드앰프단자로 로우출력이 되면서 로터리단자의 신호가 헤드스위치와 동상이고 SP모드가 아니면 SP모드일 경우와 반대 동작을 하는 제1과정과, 상기 제1과정에서 현재가 플레이모드가 아니고 스틸모드 및 2배속 모드가 아니며 현재가 슬로우모드 또는 F.ADV모드이면 테이프 이동기간 인가를 체크하는 제2과정과, 상기 제2과정에서 테이프 이동기간이 아니고 SP모드이면 헤드앰프단자의 신호가 헤드스위치와 역상이 되면서 로터리단자로 하이신호가 출력되고 SP모드가 아니면 SP모드일 경우와 반대동작을 하는 제3과정과, 상기 제3과정에서 현재가 F.ADV모드가 아니고 서어치모드이며 SP모드이면 헤드앰프단자로 하이가 출력되고 헤드스위치가 하이이면 로터리단자로 로우를 출력하면서 헤드스위치가 하이가 아니면 로터리단자로 하이를 출력하는 제4과정과, 테이프 스피드가 SP모드이고 현재가 서어치모드가 아니며 현재가 F.ADV모드 또는 슬로우모드일 경우 테이프 이동기간이면 엔벨로프 단자를 입력포트로 지정하고 테이프 스피드가 SP모드나 슬로우모드나 테이프 이동기간이 아니면 엔벨로프단자로 부터 하이가 출력하는 제5과정으로 이루어짐을 특징으로하는 4헤드 절환 제어방법.In the four-head switching method of the video cassette recorder, if the current mode is the play mode and the SP mode, the output signal is low to the head amplifier terminal, and the signal of the rotary terminal is in phase with the head switch. A second step of checking a tape movement period if the present time is not the play mode, the still mode and the double speed mode, and the current time is the slow mode or the F. ADV mode, and the second process A third process in which the signal of the head amplifier terminal is reversed with the head switch in the SP mode and not in the tape movement period, and a high signal is output to the rotary terminal, and the reverse operation is performed when the SP mode is not in the SP mode; If the current mode is not F.ADV mode, it is search mode and it is SP mode, high output is outputted to the head amplifier terminal. If the head switch is not high while outputting the right, the fourth step of outputting high to the rotary terminal, and the envelope terminal when the tape speed is in the SP mode, the current is not the search mode, and the current is the F.ADV mode or the slow mode. Is the input port, and if the tape speed is not in the SP mode, the slow mode or the tape movement period, the four-head switching control method is characterized in that the fifth process outputs high from the envelope terminal. ※ 참고사항 : 최초출원 내용에 의하여 공개하는 것임.※ Note: The disclosure is based on the initial application.
KR1019890004114A 1989-03-30 1989-03-30 4 head switching control head and method thereof KR920004217B1 (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
KR1019890004114A KR920004217B1 (en) 1989-03-30 1989-03-30 4 head switching control head and method thereof
JP2010432A JPH02288480A (en) 1989-03-30 1990-01-19 Circuit and method for head switching control
GB9001512A GB2229849B (en) 1989-03-30 1990-01-23 Improvements in or related to multiple head switching for video cassette recorders

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1019890004114A KR920004217B1 (en) 1989-03-30 1989-03-30 4 head switching control head and method thereof

Publications (2)

Publication Number Publication Date
KR900015108A true KR900015108A (en) 1990-10-25
KR920004217B1 KR920004217B1 (en) 1992-05-30

Family

ID=19284914

Family Applications (1)

Application Number Title Priority Date Filing Date
KR1019890004114A KR920004217B1 (en) 1989-03-30 1989-03-30 4 head switching control head and method thereof

Country Status (3)

Country Link
JP (1) JPH02288480A (en)
KR (1) KR920004217B1 (en)
GB (1) GB2229849B (en)

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3569618A (en) * 1966-11-04 1971-03-09 Nippon Electric Co Switching device for magnetic recording/reproducing apparatus
GB1290852A (en) * 1968-12-11 1972-09-27
JPS61123376A (en) * 1984-11-20 1986-06-11 Sanyo Electric Co Ltd Special reproducing method of magnetically recorded image reproducing device
JPS626585A (en) * 1985-07-02 1987-01-13 Mitsubishi Electric Corp Magnetic recording and reproducing device
JPS62250536A (en) * 1986-04-23 1987-10-31 Mitsubishi Electric Corp Vtr head switching device
JPS6399683A (en) * 1986-10-15 1988-04-30 Mitsubishi Electric Corp Video recording and reproducing device
JPH0752489B2 (en) * 1987-02-23 1995-06-05 株式会社日立製作所 Magnetic recording / reproducing device

Also Published As

Publication number Publication date
GB2229849A (en) 1990-10-03
JPH02288480A (en) 1990-11-28
GB9001512D0 (en) 1990-03-21
GB2229849B (en) 1993-10-06
KR920004217B1 (en) 1992-05-30

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