JPS5610783A - Magnetic recording and reproducing device - Google Patents

Magnetic recording and reproducing device

Info

Publication number
JPS5610783A
JPS5610783A JP8587479A JP8587479A JPS5610783A JP S5610783 A JPS5610783 A JP S5610783A JP 8587479 A JP8587479 A JP 8587479A JP 8587479 A JP8587479 A JP 8587479A JP S5610783 A JPS5610783 A JP S5610783A
Authority
JP
Japan
Prior art keywords
circuit
head
speed
signal
threefold
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
JP8587479A
Other languages
Japanese (ja)
Other versions
JPS6232867B2 (en
Inventor
Nobuo Azuma
Katsuo Mori
Hidekazu Funashiro
Takashi Kubota
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 JP8587479A priority Critical patent/JPS5610783A/en
Publication of JPS5610783A publication Critical patent/JPS5610783A/en
Publication of JPS6232867B2 publication Critical patent/JPS6232867B2/ja
Granted 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
    • H04N5/78—Television signal recording using magnetic recording
    • H04N5/782—Television signal recording using magnetic recording on tape
    • H04N5/783—Adaptations for reproducing at a rate different from the recording rate

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)

Abstract

PURPOSE:To reduce noise bands generated at the upper and lower ends of a reproducing screen by obtaining head outputs of a required value at both the start and end of the trace tracks of two rotary heads by making a recording track pitch wider on the basis of the rotary heads. CONSTITUTION:From variable-speed commanding circuit 53 to capstan servo circuit 51, a threefold-speed command is sent to drive magnetic tape 41 at a threefold speed and a reference signal is applied from reference oscillator 47 to tracking adjusting circuit 25 to place the tape in the best tracking state by circuit 53 in accordance with a variable-speed signal, thereby exercising servocontrol so that both the signals will be in phase by circuit 51. The signal of oscillator 47 and a signal and corresponds to the rotation of a cylinder that is detected by tack head 44 are applied to cylinder servo circuit 46 to exercise servocontrol so that the both will be in phase. Consequently, scanning tracks 31 and 32 of rotary head 43 with the tape driven at the threefold speed are obtained with regard to recording tracks A1 and A2 by head A and recording tracks B1 and B2 by head B.
JP8587479A 1979-07-09 1979-07-09 Magnetic recording and reproducing device Granted JPS5610783A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP8587479A JPS5610783A (en) 1979-07-09 1979-07-09 Magnetic recording and reproducing device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP8587479A JPS5610783A (en) 1979-07-09 1979-07-09 Magnetic recording and reproducing device

Publications (2)

Publication Number Publication Date
JPS5610783A true JPS5610783A (en) 1981-02-03
JPS6232867B2 JPS6232867B2 (en) 1987-07-17

Family

ID=13871037

Family Applications (1)

Application Number Title Priority Date Filing Date
JP8587479A Granted JPS5610783A (en) 1979-07-09 1979-07-09 Magnetic recording and reproducing device

Country Status (1)

Country Link
JP (1) JPS5610783A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6262677A (en) * 1985-09-12 1987-03-19 Sharp Corp Magnetic recording and reproducing device
JP2007308959A (en) * 2006-05-18 2007-11-29 Sekisui Chem Co Ltd Roof structure

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4998915A (en) * 1973-01-23 1974-09-19
JPS5090240A (en) * 1973-12-11 1975-07-19
JPS5317315A (en) * 1976-07-31 1978-02-17 Sony Corp Reproducer

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4998915A (en) * 1973-01-23 1974-09-19
JPS5090240A (en) * 1973-12-11 1975-07-19
JPS5317315A (en) * 1976-07-31 1978-02-17 Sony Corp Reproducer

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6262677A (en) * 1985-09-12 1987-03-19 Sharp Corp Magnetic recording and reproducing device
JP2007308959A (en) * 2006-05-18 2007-11-29 Sekisui Chem Co Ltd Roof structure

Also Published As

Publication number Publication date
JPS6232867B2 (en) 1987-07-17

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