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JPS56124142A - Detecting device for tape speed of magnetic recording and reproducing device - Google Patents

Detecting device for tape speed of magnetic recording and reproducing device

Info

Publication number
JPS56124142A
JPS56124142A JP2893380A JP2893380A JPS56124142A JP S56124142 A JPS56124142 A JP S56124142A JP 2893380 A JP2893380 A JP 2893380A JP 2893380 A JP2893380 A JP 2893380A JP S56124142 A JPS56124142 A JP S56124142A
Authority
JP
Japan
Prior art keywords
mode
reproducing
recorded
signal
reproduced
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.)
Pending
Application number
JP2893380A
Other languages
Japanese (ja)
Inventor
Koichi Yamada
Toshiomi Yabu
Tatsuo Wada
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 JP2893380A priority Critical patent/JPS56124142A/en
Publication of JPS56124142A publication Critical patent/JPS56124142A/en
Pending 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
    • G11B15/18—Driving; Starting; Stopping; Arrangements for control or regulation thereof
    • G11B15/46—Controlling, regulating, or indicating speed

Abstract

PURPOSE:To detect the tape speed at the recording time digitally, when the tape where the signal is recorded in three kinds of speed is reproduced. CONSTITUTION:In the recorded reproducing control signal, frequencies different by respective reproducing modes within the range of 10Hz-90Hz are obtained. If this signal is recorded in the two-hour (2H) mode and is reproduced in another reproducing mode, the reproducing control signal of 15Hz or less is obtained, and output na of counting circuit 8 becomes low, and pulse outputs are generated in na and nc. Outputs (a) and (b) of R-S.FFs 9 and 10 are held in L:L to detect the 2H recording mode. If the signal is recorded in the six-four (6H) mode and is reproduced in another reproducing mode, the reproducing control signal of 45Hz or more is obtained, and nb and nc become low, and outputs (a) and (b) are held in H:L to detect the 6H recording mode. If the signal recorded in the four-hour (4H) mode is reproduced in another reproducing mode, outputs (a) and (b) become H:L to detect the 4H mode.
JP2893380A 1980-03-06 1980-03-06 Detecting device for tape speed of magnetic recording and reproducing device Pending JPS56124142A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2893380A JPS56124142A (en) 1980-03-06 1980-03-06 Detecting device for tape speed of magnetic recording and reproducing device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2893380A JPS56124142A (en) 1980-03-06 1980-03-06 Detecting device for tape speed of magnetic recording and reproducing device

Publications (1)

Publication Number Publication Date
JPS56124142A true JPS56124142A (en) 1981-09-29

Family

ID=12262192

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2893380A Pending JPS56124142A (en) 1980-03-06 1980-03-06 Detecting device for tape speed of magnetic recording and reproducing device

Country Status (1)

Country Link
JP (1) JPS56124142A (en)

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