JPS5724177A - Magnetic recording and playback device - Google Patents

Magnetic recording and playback device

Info

Publication number
JPS5724177A
JPS5724177A JP9864280A JP9864280A JPS5724177A JP S5724177 A JPS5724177 A JP S5724177A JP 9864280 A JP9864280 A JP 9864280A JP 9864280 A JP9864280 A JP 9864280A JP S5724177 A JPS5724177 A JP S5724177A
Authority
JP
Japan
Prior art keywords
signal
playback
circuit
phase shift
shift circuit
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
JP9864280A
Other languages
Japanese (ja)
Inventor
Atsushi Yoshioka
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.)
Hitachi Ltd
Original Assignee
Hitachi 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 Hitachi Ltd filed Critical Hitachi Ltd
Priority to JP9864280A priority Critical patent/JPS5724177A/en
Publication of JPS5724177A publication Critical patent/JPS5724177A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N5/00—Details of television systems
    • H04N5/76—Television signal recording
    • H04N5/91—Television signal processing therefor
    • H04N5/92—Transformation of the television signal for recording, e.g. modulation, frequency changing; Inverse transformation for playback

Abstract

PURPOSE:To sufficiently suppress the production of inverting phenomenon even for VTRs for home use which require high density recording, by maximizing the delay time at the frequency corresponding to the black level of FM signals for playback system. CONSTITUTION:An FM signal transmission line of playback system for a video signal is provided with a phase shift circuit 11 in which almost maximum delay time can be given to the FM signal at the frequency of the FM signal corresponding near the black level of the video signal. For example, a signal voltage eR1 reproduced from a magnetic tape 102 with a playback head 103 is applied to a playback amplifier 5 for equalization and amplification to be a signal voltage eR1', which is applied to the phase shift circuit 11. The output signal eR2 of this phase shift circuit 11 is inputted to a limiter circuit 6 to be a signal eR2' in which the amplitude variance component in the playback signal is removed, and it is inputted to a phase compensation circuit 12 and a playback signal eR is obtained at an output terminal 13 via an FM demodulator 7, and de-emphasis circuit 8.
JP9864280A 1980-07-21 1980-07-21 Magnetic recording and playback device Pending JPS5724177A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP9864280A JPS5724177A (en) 1980-07-21 1980-07-21 Magnetic recording and playback device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP9864280A JPS5724177A (en) 1980-07-21 1980-07-21 Magnetic recording and playback device

Publications (1)

Publication Number Publication Date
JPS5724177A true JPS5724177A (en) 1982-02-08

Family

ID=14225151

Family Applications (1)

Application Number Title Priority Date Filing Date
JP9864280A Pending JPS5724177A (en) 1980-07-21 1980-07-21 Magnetic recording and playback device

Country Status (1)

Country Link
JP (1) JPS5724177A (en)

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