JPS6410447A - Magneto-optical recording and reproducing device - Google Patents

Magneto-optical recording and reproducing device

Info

Publication number
JPS6410447A
JPS6410447A JP16416387A JP16416387A JPS6410447A JP S6410447 A JPS6410447 A JP S6410447A JP 16416387 A JP16416387 A JP 16416387A JP 16416387 A JP16416387 A JP 16416387A JP S6410447 A JPS6410447 A JP S6410447A
Authority
JP
Japan
Prior art keywords
information
recorded
magnetic field
external magnetic
data
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
JP16416387A
Other languages
Japanese (ja)
Inventor
Seiichi Iino
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.)
Seiko Epson Corp
Original Assignee
Seiko Epson Corp
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 Seiko Epson Corp filed Critical Seiko Epson Corp
Priority to JP16416387A priority Critical patent/JPS6410447A/en
Publication of JPS6410447A publication Critical patent/JPS6410447A/en
Pending legal-status Critical Current

Links

Landscapes

  • Recording Or Reproducing By Magnetic Means (AREA)

Abstract

PURPOSE:To attain overwriting without requiring erasure action by means of one pickup by reading sector information of a data management area and using the information so as to attain the changeover of an external magnetic field and the selection of the delay in the recorded data pulse. CONSTITUTION:The magneto-optical recording medium is provided with a data management area 35 and the information recording method of each sector is recorded to the area. The data management are 35 is read in the step 40 to read the recording method of each sector corresponding to the constitution of a file to be recorded. After the information is used to discriminate the direction of an external magnetic field and the delay in the clock of the recorded data, the clock is retarded so as to bring the trailing edge of a recording pulse comes in the middle of the data cell in the step 43 and the direction of the external magnetic field is switched properly in the step 44. Thus, only one optical pickup applies overwrite without requiring the erasure action.
JP16416387A 1987-07-01 1987-07-01 Magneto-optical recording and reproducing device Pending JPS6410447A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP16416387A JPS6410447A (en) 1987-07-01 1987-07-01 Magneto-optical recording and reproducing device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP16416387A JPS6410447A (en) 1987-07-01 1987-07-01 Magneto-optical recording and reproducing device

Publications (1)

Publication Number Publication Date
JPS6410447A true JPS6410447A (en) 1989-01-13

Family

ID=15787925

Family Applications (1)

Application Number Title Priority Date Filing Date
JP16416387A Pending JPS6410447A (en) 1987-07-01 1987-07-01 Magneto-optical recording and reproducing device

Country Status (1)

Country Link
JP (1) JPS6410447A (en)

Similar Documents

Publication Publication Date Title
EP0166461A3 (en) Method for writing clock track for use with an embedded servo track following system
JPS57117106A (en) Optical magnetic recording and reproducing method
FR2581470B1 (en)
DE3485541D1 (en) DEVICE FOR DISK PLAYBACK.
JPS6421737A (en) Overlight system for magneto-optic recording
JPS5792446A (en) Recording, reproduction and erasure system for information using photomagnetic recording medium
JPS5424008A (en) Magnetic recording and photo reproducing system
JPS5637A (en) Tracking system of optical disc memory
EP0316188A3 (en) Method and apparatus for direct overwriting of digital data recorded on magneto-optical recording media including a direct overwrite magneto-optic system for strip erasing and recording elongated domains and a single-head, direct overwrite magneto-optic system
JPS6437745A (en) Magneto-optical disk device
KR860005308A (en) Magnetic recording card and its data recording method and record reading device
EP0195227A3 (en) Magneto-optical disc memory
JPS57172552A (en) Reproducing method for stored information
JPS6410447A (en) Magneto-optical recording and reproducing device
JPS56140455A (en) File memory of large capacity
EP0402071A3 (en) Signal processing circuit for magnetooptical record/reproducing apparatus
JPS578864A (en) Magnetic disk recording system
CA2025724A1 (en) Information processor and disk memory used in the same
EP0330507A3 (en) Magneto-optic recording and regenerating process, device using same and magneto-optic disk
JP2650927B2 (en) Magneto-optical recording method
JPS57186248A (en) Vertically thermomagnetic recording and reproducing system
JPS57113415A (en) Vertical magnetic recording medium
JPS57164459A (en) Method and device for vertical magnetic recording light reproduction
JPS648531A (en) Magneto-optical recording and reproducing device
JPS648527A (en) Magneto-optical recording and reproducing device