JPS6430003A - Method for erasing magnetic record - Google Patents

Method for erasing magnetic record

Info

Publication number
JPS6430003A
JPS6430003A JP18367287A JP18367287A JPS6430003A JP S6430003 A JPS6430003 A JP S6430003A JP 18367287 A JP18367287 A JP 18367287A JP 18367287 A JP18367287 A JP 18367287A JP S6430003 A JPS6430003 A JP S6430003A
Authority
JP
Japan
Prior art keywords
video signal
erasing
signal
track
erased
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
JP18367287A
Other languages
Japanese (ja)
Other versions
JPH0743808B2 (en
Inventor
Takashi Soga
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.)
Fujifilm Holdings Corp
Original Assignee
Fuji Photo Film 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 Fuji Photo Film Co Ltd filed Critical Fuji Photo Film Co Ltd
Priority to JP18367287A priority Critical patent/JPH0743808B2/en
Publication of JPS6430003A publication Critical patent/JPS6430003A/en
Publication of JPH0743808B2 publication Critical patent/JPH0743808B2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Landscapes

  • Recording Or Reproducing By Magnetic Means (AREA)
  • Digital Magnetic Recording (AREA)
  • Signal Processing Not Specific To The Method Of Recording And Reproducing (AREA)

Abstract

PURPOSE:To rapidly and surely erase magnetic record by erasing a video signal recorded on a track by alternate magnetic flux generated in accordance with the amplitude level of erasing current flowing into a magnetic head. CONSTITUTION:In an initial period, a track 7a to be erased is saturatedly magnetized by alternate magnetic flux with high amplitude and a recorded video signal is converted into a 14MHz signal, so that the spectrum component of the video signal is removed. In the succeeding period, residual magnetization especially left in a brightness signal band out of the video signal is reduced by alternate magnetic flux whose amplitude is gradually reduced and the level of the erasing current (i) recorded on the track 7a is also reduced. Since the video signal is erased by said procedure, the video signal can be rapidly and surely erased without leaving an erasing signal in the frequency band of the video signal.
JP18367287A 1987-07-24 1987-07-24 Erasing method in magnetic recording Expired - Fee Related JPH0743808B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP18367287A JPH0743808B2 (en) 1987-07-24 1987-07-24 Erasing method in magnetic recording

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP18367287A JPH0743808B2 (en) 1987-07-24 1987-07-24 Erasing method in magnetic recording

Publications (2)

Publication Number Publication Date
JPS6430003A true JPS6430003A (en) 1989-01-31
JPH0743808B2 JPH0743808B2 (en) 1995-05-15

Family

ID=16139907

Family Applications (1)

Application Number Title Priority Date Filing Date
JP18367287A Expired - Fee Related JPH0743808B2 (en) 1987-07-24 1987-07-24 Erasing method in magnetic recording

Country Status (1)

Country Link
JP (1) JPH0743808B2 (en)

Also Published As

Publication number Publication date
JPH0743808B2 (en) 1995-05-15

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