JPS5542364A - Magnetic recording and reproducing device - Google Patents

Magnetic recording and reproducing device

Info

Publication number
JPS5542364A
JPS5542364A JP11579078A JP11579078A JPS5542364A JP S5542364 A JPS5542364 A JP S5542364A JP 11579078 A JP11579078 A JP 11579078A JP 11579078 A JP11579078 A JP 11579078A JP S5542364 A JPS5542364 A JP S5542364A
Authority
JP
Japan
Prior art keywords
drop
tracks
cross
cross talk
adjacent tracks
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
JP11579078A
Other languages
Japanese (ja)
Other versions
JPS635804B2 (en
Inventor
Satoshi Ito
Hidekazu Funashiro
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 JP11579078A priority Critical patent/JPS5542364A/en
Publication of JPS5542364A publication Critical patent/JPS5542364A/en
Publication of JPS635804B2 publication Critical patent/JPS635804B2/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
    • G11B5/00—Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
    • G11B5/02—Recording, reproducing, or erasing methods; Read, write or erase circuits therefor

Abstract

PURPOSE:To obtain a magnetic recording and reproducing device with a little generation of beat noise due to a drop-out or cross talk between adjoining tracks, by giving a video head a difference in level between CH1 and CH2. CONSTITUTION:As for recording reproduction only at a normal speed, head fitting step (alpha) is zero and in variable-speed reproduction, fixed step (alpha) is provided so as to suppress a drop-out and cross talk between adjoining tracks. As a result, recording track width becomes unbalanced between CH1 and CH2, but cross talks 5a and 5b of adjacent tracks of respective heads become balanced. At this time, outputs of respective heads are equal in minimum value and the cross talks of adjacent tracks are driven away vertical on a regenerated picture, so that picture quality can be secured. In this way, the generation of beat noise due to the drop-out and cross talk between adjacent tracks can be reduced.
JP11579078A 1978-09-22 1978-09-22 Magnetic recording and reproducing device Granted JPS5542364A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP11579078A JPS5542364A (en) 1978-09-22 1978-09-22 Magnetic recording and reproducing device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP11579078A JPS5542364A (en) 1978-09-22 1978-09-22 Magnetic recording and reproducing device

Publications (2)

Publication Number Publication Date
JPS5542364A true JPS5542364A (en) 1980-03-25
JPS635804B2 JPS635804B2 (en) 1988-02-05

Family

ID=14671127

Family Applications (1)

Application Number Title Priority Date Filing Date
JP11579078A Granted JPS5542364A (en) 1978-09-22 1978-09-22 Magnetic recording and reproducing device

Country Status (1)

Country Link
JP (1) JPS5542364A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5613878A (en) * 1979-07-13 1981-02-10 Toshiba Corp Magnetic picture recorder/reproducer
DE3932634A1 (en) * 1988-09-30 1990-04-05 Asahi Optical Co Ltd RETROFOCUS WIDE-ANGLE LENS SYSTEM

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4990513A (en) * 1972-12-28 1974-08-29
JPS4998915A (en) * 1973-01-23 1974-09-19
JPS5090240A (en) * 1973-12-11 1975-07-19
JPS5317302A (en) * 1976-07-31 1978-02-17 Sony Corp Tape for adjustment
JPS5317315A (en) * 1976-07-31 1978-02-17 Sony Corp Reproducer
JPS5317886A (en) * 1976-08-03 1978-02-18 Howa Sangyo Kk Rotation number control apparatus
JPS54104229A (en) * 1978-02-03 1979-08-16 Victor Co Of Japan Ltd Magnetic reproducer

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4990513A (en) * 1972-12-28 1974-08-29
JPS4998915A (en) * 1973-01-23 1974-09-19
JPS5090240A (en) * 1973-12-11 1975-07-19
JPS5317302A (en) * 1976-07-31 1978-02-17 Sony Corp Tape for adjustment
JPS5317315A (en) * 1976-07-31 1978-02-17 Sony Corp Reproducer
JPS5317886A (en) * 1976-08-03 1978-02-18 Howa Sangyo Kk Rotation number control apparatus
JPS54104229A (en) * 1978-02-03 1979-08-16 Victor Co Of Japan Ltd Magnetic reproducer

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5613878A (en) * 1979-07-13 1981-02-10 Toshiba Corp Magnetic picture recorder/reproducer
JPS6052624B2 (en) * 1979-07-13 1985-11-20 株式会社東芝 magnetic recording and playback device
DE3932634A1 (en) * 1988-09-30 1990-04-05 Asahi Optical Co Ltd RETROFOCUS WIDE-ANGLE LENS SYSTEM

Also Published As

Publication number Publication date
JPS635804B2 (en) 1988-02-05

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