JPS5788543A - Rotary head type magnetic video recorder and reproducer - Google Patents

Rotary head type magnetic video recorder and reproducer

Info

Publication number
JPS5788543A
JPS5788543A JP55163636A JP16363680A JPS5788543A JP S5788543 A JPS5788543 A JP S5788543A JP 55163636 A JP55163636 A JP 55163636A JP 16363680 A JP16363680 A JP 16363680A JP S5788543 A JPS5788543 A JP S5788543A
Authority
JP
Japan
Prior art keywords
output
duty
integration
signal
index
Prior art date
Legal status (The legal status 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 status listed.)
Granted
Application number
JP55163636A
Other languages
Japanese (ja)
Other versions
JPS6346891B2 (en
Inventor
Yoshinori Iwazono
Masataka Higuchi
Masakazu Mori
Kazuo Nishimura
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Panasonic Holdings Corp
Original Assignee
Matsushita Electric Industrial Co Ltd
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 Matsushita Electric Industrial Co Ltd filed Critical Matsushita Electric Industrial Co Ltd
Priority to JP55163636A priority Critical patent/JPS5788543A/en
Publication of JPS5788543A publication Critical patent/JPS5788543A/en
Publication of JPS6346891B2 publication Critical patent/JPS6346891B2/ja
Granted legal-status Critical Current

Links

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
    • G11B15/05—Control of operating function, e.g. switching from recording to reproducing by sensing features present on or derived from record carrier or container
    • G11B15/087—Control of operating function, e.g. switching from recording to reproducing by sensing features present on or derived from record carrier or container by sensing recorded signals

Landscapes

  • Indexing, Searching, Synchronizing, And The Amount Of Synchronization Travel Of Record Carriers (AREA)

Abstract

PURPOSE:To detect an index signal accurately at all times, by comparing the integration output of a rectangular pulse corresponding to a control signal in which the duty forming the index signal is changed and an opposing polarity pulse, respectively. CONSTITUTION:A playback control signal forming an index signal with the change in the duty via an amplifier 2 is processed at positive/negative polarity pulse separating circuits 3, 4, a missing signal correcting circuit 6, and an FF5. Then, a rectangular pulse (f) and an opposite polarity rectangular pulse (f') according to the duty are generated from the FF5 and they are respectively integrated at integration circuits 7, 9. When the integration outputs (g), (g') are compared at a comparison circuit 10 by taking the output (g') as a reference, the effects such as change in playback speed and ambient temperature are canceled with a section output (h) where the output (g) is smaller than the (g'), allowing to detect index signals accurately at all times.
JP55163636A 1980-11-19 1980-11-19 Rotary head type magnetic video recorder and reproducer Granted JPS5788543A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP55163636A JPS5788543A (en) 1980-11-19 1980-11-19 Rotary head type magnetic video recorder and reproducer

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP55163636A JPS5788543A (en) 1980-11-19 1980-11-19 Rotary head type magnetic video recorder and reproducer

Publications (2)

Publication Number Publication Date
JPS5788543A true JPS5788543A (en) 1982-06-02
JPS6346891B2 JPS6346891B2 (en) 1988-09-19

Family

ID=15777693

Family Applications (1)

Application Number Title Priority Date Filing Date
JP55163636A Granted JPS5788543A (en) 1980-11-19 1980-11-19 Rotary head type magnetic video recorder and reproducer

Country Status (1)

Country Link
JP (1) JPS5788543A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6141171A (en) * 1997-04-28 2000-10-31 Nec Corporation Cue signal detection circuit of magnetic recording and reproducing device

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6141171A (en) * 1997-04-28 2000-10-31 Nec Corporation Cue signal detection circuit of magnetic recording and reproducing device

Also Published As

Publication number Publication date
JPS6346891B2 (en) 1988-09-19

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