JPS54146925A - Magnetic recording and reproducing device - Google Patents

Magnetic recording and reproducing device

Info

Publication number
JPS54146925A
JPS54146925A JP5453178A JP5453178A JPS54146925A JP S54146925 A JPS54146925 A JP S54146925A JP 5453178 A JP5453178 A JP 5453178A JP 5453178 A JP5453178 A JP 5453178A JP S54146925 A JPS54146925 A JP S54146925A
Authority
JP
Japan
Prior art keywords
recording
signals
color
time
level
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
JP5453178A
Other languages
Japanese (ja)
Other versions
JPS6036676B2 (en
Inventor
Kanji Yoshikawa
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 JP53054531A priority Critical patent/JPS6036676B2/en
Publication of JPS54146925A publication Critical patent/JPS54146925A/en
Publication of JPS6036676B2 publication Critical patent/JPS6036676B2/en
Expired legal-status Critical Current

Links

Abstract

PURPOSE: To improve S/N by increasing the recording current in comparison with a normal recording time to raise a reproducing level in case of switching to recording for a long time.
CONSTITUTION: Signals applied from the VTR external to input terminal 11 have luminance components in video signals taken out by video processing circuit 1, and luminance components are subjected to frequency modulation by FM modulator 2 and are amplified by luminance signal recording amplifier 3. Meanwhile, in the color signal system, color components in video signals are taken out by band pass filter 9 and are amplified by color signal recording amplifier 7 after converted to a low band by frequency converter 8. FM modulation signals and color signals converted to the low band are adjusted to proper levels by level adjustment equipment 4 and 6 and are mixed and supplied to head 5. Level adjustment equipment 6 is controlled by control part 10 according to switching of the recording time, and the recording current level of color signals is raised to perform recording at a long-time (4 hours) recording time.
COPYRIGHT: (C)1979,JPO&Japio
JP53054531A 1978-05-10 1978-05-10 magnetic recording and reproducing device Expired JPS6036676B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP53054531A JPS6036676B2 (en) 1978-05-10 1978-05-10 magnetic recording and reproducing device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP53054531A JPS6036676B2 (en) 1978-05-10 1978-05-10 magnetic recording and reproducing device

Publications (2)

Publication Number Publication Date
JPS54146925A true JPS54146925A (en) 1979-11-16
JPS6036676B2 JPS6036676B2 (en) 1985-08-21

Family

ID=12973240

Family Applications (1)

Application Number Title Priority Date Filing Date
JP53054531A Expired JPS6036676B2 (en) 1978-05-10 1978-05-10 magnetic recording and reproducing device

Country Status (1)

Country Link
JP (1) JPS6036676B2 (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58172089A (en) * 1982-04-02 1983-10-08 Hitachi Ltd Signal writing circuit
JPS5948804A (en) * 1982-09-10 1984-03-21 Hitachi Ltd Recording circuit of video tape recorder
JPS59138185A (en) * 1983-01-28 1984-08-08 Hitachi Ltd Recording circuit of video tape recorder

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58172089A (en) * 1982-04-02 1983-10-08 Hitachi Ltd Signal writing circuit
JPS5948804A (en) * 1982-09-10 1984-03-21 Hitachi Ltd Recording circuit of video tape recorder
JPH0424778B2 (en) * 1982-09-10 1992-04-28 Hitachi Ltd
JPS59138185A (en) * 1983-01-28 1984-08-08 Hitachi Ltd Recording circuit of video tape recorder
JPH0134515B2 (en) * 1983-01-28 1989-07-19 Hitachi Ltd

Also Published As

Publication number Publication date
JPS6036676B2 (en) 1985-08-21

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