KR960019259A - Editing circuit of video cassette recorder - Google Patents

Editing circuit of video cassette recorder Download PDF

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Publication number
KR960019259A
KR960019259A KR1019940029554A KR19940029554A KR960019259A KR 960019259 A KR960019259 A KR 960019259A KR 1019940029554 A KR1019940029554 A KR 1019940029554A KR 19940029554 A KR19940029554 A KR 19940029554A KR 960019259 A KR960019259 A KR 960019259A
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KR
South Korea
Prior art keywords
head
video
audio
video cassette
cassette recorder
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KR1019940029554A
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Korean (ko)
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KR0155967B1 (en
Inventor
강용진
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김광호
삼성전자 주식회사
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Priority to KR1019940029554A priority Critical patent/KR0155967B1/en
Publication of KR960019259A publication Critical patent/KR960019259A/en
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Publication of KR0155967B1 publication Critical patent/KR0155967B1/en

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    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B27/00—Editing; Indexing; Addressing; Timing or synchronising; Monitoring; Measuring tape travel
    • G11B27/02—Editing, e.g. varying the order of information signals recorded on, or reproduced from, record carriers
    • 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
    • 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
    • G11B5/008—Recording on, or reproducing or erasing from, magnetic tapes, sheets, e.g. cards, or wires
    • G11B5/00813—Recording on, or reproducing or erasing from, magnetic tapes, sheets, e.g. cards, or wires magnetic tapes
    • 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
    • G11B5/02—Recording, reproducing, or erasing methods; Read, write or erase circuits therefor
    • G11B5/024—Erasing
    • 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
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B33/00—Constructional parts, details or accessories not provided for in the other groups of this subclass
    • G11B33/12—Disposition of constructional parts in the apparatus, e.g. of power supply, of modules
    • G11B33/121—Disposition of constructional parts in the apparatus, e.g. of power supply, of modules the apparatus comprising a single recording/reproducing device
    • G11B33/122—Arrangements for providing electrical connections, e.g. connectors, cables, switches

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  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Management Or Editing Of Information On Record Carriers (AREA)
  • Television Signal Processing For Recording (AREA)

Abstract

본 고안은 비데오 카세트 테이프의 소정부분에 기록된 정보를 소거하고 새로운 정보를 기록하는 편집기능을 갖는 비데오 카세트 레코더의 편집회로에 관한 것으로서, 특히 별도의 편집전용 소거헤드를 구비하지 않고도 편집기능을 수행하는 경우 비데오 카세트 레코더내에 장착된 각 헤드간의 이격거리차로 인하여 비데오 카세트 테이프상에 무신호구간이 발생되는 것을 방지하도록 한 비데오 카세트 레코더의 편집회로에 관한 것이다. 전술한 비데오 카세트 레코더의 편집회로는 전소거 헤드와 오디오소거 헤드 및 오디오 헤드를 동작시키기 위한 소정주파수를 발진시키는 발진수단과, 발진수단에서 출력된 발진주파수가 전소거 헤드와 오디오 헤드에 인가되는 것을 스위칭하는 제1스위칭수단과, 제1스위칭수단에 의해 전소거 헤드와 오디오 헤드에 인가되는 발진주파수가 차단되었을때 이 발진주파수에 의한 과포화 임피던스의 발생을 방지시키는 과포화 방지수단과, 과포화 방지수단의 동작을 스위칭하는 제2스위칭수단과, 제1 및 제2스위칭수단과 발진수단 및 비데오 헤드에 각각 동작신호를 인가함과 동시에 제1 및 제2스위칭수단과 발진수단 및 비데오 헤드에 각각 설정된 소정지연 시간의 간격을 두고 동작중지신호를 출력하는 제어수단을 구비하여 구성된다.The present invention relates to an editing circuit of a video cassette recorder having an editing function for erasing information recorded on a predetermined portion of a video cassette tape and recording new information. In particular, the present invention performs an editing function without providing a separate editing-only erase head. The present invention relates to an editing circuit of a video cassette recorder, which prevents a signal-free section from occurring on a video cassette tape due to a separation distance between the heads mounted in the video cassette recorder. The editing circuit of the video cassette recorder described above includes oscillation means for oscillating a predetermined frequency for operating the pre-erasing head, the audio erasing head, and the audio head, and that the oscillation frequency output from the oscillating means is applied to the pre-erasing head and the audio head. A first switching means for switching, an oversaturation preventing means for preventing generation of supersaturated impedance by the oscillation frequency when the oscillation frequencies applied to the pre-erasing head and the audio head are blocked by the first switching means; A predetermined delay set in the first and second switching means, the oscillating means, and the video head, respectively, while applying an operation signal to the second switching means, the first and second switching means, the oscillating means, and the video head, respectively. And control means for outputting an operation stop signal at intervals of time.

Description

비데오 카세트 레코더의 편집회로Editing circuit of video cassette recorder

본 내용은 요부공개 건이므로 전문내용을 수록하지 않았음As this is a public information case, the full text was not included.

제3도는 이 발명의 일실시예에 의한 비데오 카세트 레코더의 편집회로를 개략적으로 도시한 블럭도,3 is a block diagram schematically showing an editing circuit of a video cassette recorder according to an embodiment of the present invention;

제4도는 제3도에 도시된 마이크로 컴퓨터의 동작흐름도.4 is a flowchart of the operation of the microcomputer shown in FIG.

Claims (8)

비데오 카세트 테이프상에 기록된 비데오신호 및 오디오신호를 모두 소거하는 전소거헤드와, 오디오신호를 소거하는 오디오소거 헤드와, 새로운 오디오신호를 기록하는 오디오 헤드와, 새로운 비데오신호를 기록하는 비데오 헤드를 구비하는 비데오 카세트 레코더의 편집회로에 있어서 : 전소거 헤드와 오디오소거 헤드 및 오디오 헤드를 동작시키기 위한 소정주파수를 발진시키는 발진수단과, 발진수단에서 출력된 발진주파수가 전소거 헤드와 오디오 헤드에 인가되는 것을 스위칭하는 제1스위칭수단과, 제1스위칭수단에 의해 전소거 헤드와 오디오 헤드에 인가되는 발진주파수가 차단되었을때 이 발진주파수에 의한 과포화 임피던스의 발생을 방지시키는 과포화 방지수단과, 과포화 방지수단의 동작을 스위칭하는 제2스위칭수단과, 제1 및 제2스위칭수단과 발진수단 및 비데오 헤드에 각각 동작제어신호를 인가함과 동시에 제1 및 제2스위칭수단과 발진수단 및 비데오 헤드에 각각 설정된 소정지연 시간의 간격을 두고 동작중지신호를 출력하는 제어수단을 구비하는 비데오 카세트 레코더의 편집회로.An all-erasing head for erasing all video and audio signals recorded on a video cassette tape, an audio erasing head for canceling audio signals, an audio head for recording new audio signals, and a video head for recording new video signals. An editing circuit of a video cassette recorder, comprising: oscillating means for oscillating a predetermined frequency for operating the pre-erasing head, the audio scavenging head, and the audio head, and an oscillating frequency output from the oscillating means is applied to the pre-erasing head and the audio head A first switching means for switching the thing, an oversaturation prevention means for preventing generation of supersaturation impedance by the oscillation frequency when the oscillation frequencies applied to the pre-erasing head and the audio head are blocked by the first switching means; Second switching means for switching the operation of the means, and first and second switches Control means for applying an operation control signal to the means, the oscillation means and the video head, respectively, and outputting an operation stop signal with a predetermined delay time set in the oscillation means and the video head, respectively. Editing circuit of a video cassette recorder. 제1항에 있어서, 상기 제어수단은, 외부에서 편집기능이 선택되었는가를 판단하여 제1 및 제2스위칭 수단과 발진수단 및 비데오 헤드에 동작제어신호를 출력하고, 편집기능 중지키가 입력되었는가를 판단하여 타이머를 초기화시킨 후 제1 및 제2스위칭수단에 동작중지신호를 출력하며, 제1소정기간이 경과한 후 비데오 헤드에 동작중지신호를 출력하고, 제2소정시간이 경과한 후 발진수단에 동작중지신호를 출력하도록 된 비데오 카세트 레코더의 편집회로.The apparatus of claim 1, wherein the control unit determines whether an editing function is selected from the outside, outputs an operation control signal to the first and second switching means, the oscillating means, and the video head, and determines whether an editing function stop key has been input. After the timer is determined and initialized, the operation stop signal is output to the first and second switching means, the operation stop signal is output to the video head after the first predetermined period has elapsed, and the oscillation means after the second predetermined time has elapsed. And an editing circuit of a video cassette recorder configured to output an operation stop signal to the video cassette recorder. 제2항에 있어서, 상기 제1소정시간은, 전소거 헤드와 비데오 헤드간의 이격거리만큼 테이프가 주행되는 시간간격과 동일하게 설정됨을 특징으로 하는 비데오 카세트 레코더의 편집회로.3. The editing circuit of a video cassette recorder according to claim 2, wherein the first predetermined time is set equal to the time interval at which the tape travels by the separation distance between the pre-erasing head and the video head. 제2항에 있어서, 상기 제2소정시간은, 전소거 헤드와 오디오 헤드간의 이격거리만큼 테이프가 주행되는 시간간격과 동일하게 설정됨을 특징으로 하는 비데오 카세트 레코더의 편집회로.3. The editing circuit of a video cassette recorder according to claim 2, wherein the second predetermined time is set equal to the time interval at which the tape travels by the separation distance between the pre-erasing head and the audio head. 비데오 카세트 테이프상에 기록된 비데오신호 및 오디오신호를 모두 소거하는 전소거헤드와, 오디오신호를 소거하는 오디오소거 헤드와, 새로운 오디오신호를 기록하는 오디오 헤드와, 새로운 비데오신호를 기록하는 비데오 헤드를 구비하는 비데오 카세트 레코더의 편집회로에 있어서 : 전소건 헤드와 오디오소거 헤드 및 오디오 헤드를 동작시키기 위한 소정주파수를 발진시키는 제1발진수단과, 오디오헤드를 동작시키기 위한 소정주파수를 발진시키는 제2발진수단과, 제1 및 제2발진수단과 비데오 헤드에 동작제어신호를 인가함과 동시에 제1 및 제2발진수단과 비데오 헤드에 각각 설정된 소정지연시간의 간격을 두고 동작중지신호를 출력하는 제어수단을 구비하는 비데오 카세트 레코더의 편집회로.An all-erasing head for erasing all video and audio signals recorded on a video cassette tape, an audio erasing head for canceling audio signals, an audio head for recording new audio signals, and a video head for recording new video signals. An editing circuit of a video cassette recorder, comprising: first oscillating means for oscillating a predetermined frequency for operating an all-head head, an audio scavenging head, and an audio head, and a second oscillating for oscillating a predetermined frequency for operating an audio head Control means for applying an operation control signal to the first and second oscillation means and the video head, and outputting an operation stop signal at a predetermined delay time set in the first and second oscillation means and the video head, respectively. Editing circuit of the video cassette recorder having a. 제5항에 있어서, 상기 제어수단은, 외부에서 편집기능이 선택되었는가를 판단하여 제1 및 제2발진수단과 비데오 헤드에 동작제어신호를 출력하고, 편집기능 중지키가 입력되었는가를 판단하여 타이머를 초기화시킨 후 제1발진수단에 동작중지신호를 출력하며, 제1소정신간이 경과한 후 비데오 헤드에 동작중지신호를 출력하고, 제2소정시간이 경과한 후 제2발진수단에 동작중지신호를 출력하도록 된 비데오 카세트 레코더의 편집회로.The timer according to claim 5, wherein the control means determines whether an editing function is selected from the outside, outputs an operation control signal to the first and second oscillating means and the video head, and determines whether an editing function stop key is input. Outputs an operation stop signal to the first oscillation means after initializing the signal, outputs an operation stop signal to the video head after the first predetermined time elapses, and stops the operation signal to the second oscillation means after the second predetermined time elapses. Editing circuit of the video cassette recorder to output. 제6항에 있어서, 상기 제1소정시간은, 전소거 헤드와 비데오 헤드간의 이격거리만큼 테이프가 주행되는 시간간격과 동일하게 설정됨을 특징으로 하는 비데오 카세트 레코더의 편집회로.7. The editing circuit of a video cassette recorder according to claim 6, wherein the first predetermined time is set equal to the time interval at which the tape is driven by the separation distance between the pre-erasing head and the video head. 제6항에 있어서, 상기 제2소정시간은, 전소거 헤드와 오디오 헤드간의 이격거리만큼 테이프가 주행되는 시간간격과 동일하게 설정됨을 특징으로 하는 비데오 카세트 레코더의 편집회로.7. The editing circuit of a video cassette recorder according to claim 6, wherein the second predetermined time is set equal to the time interval at which the tape travels by the separation distance between the pre-erasing head and the audio head. ※ 참고사항 : 최초출원 내용에 의하여 공개하는 것임.※ Note: The disclosure is based on the initial application.
KR1019940029554A 1994-11-11 1994-11-11 Editing circuit of video cassette recorder KR0155967B1 (en)

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Application Number Priority Date Filing Date Title
KR1019940029554A KR0155967B1 (en) 1994-11-11 1994-11-11 Editing circuit of video cassette recorder

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Application Number Priority Date Filing Date Title
KR1019940029554A KR0155967B1 (en) 1994-11-11 1994-11-11 Editing circuit of video cassette recorder

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KR960019259A true KR960019259A (en) 1996-06-17
KR0155967B1 KR0155967B1 (en) 1998-12-15

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