JPS648530A - Magneto-optical recording and reproducing device - Google Patents
Magneto-optical recording and reproducing deviceInfo
- Publication number
- JPS648530A JPS648530A JP16415587A JP16415587A JPS648530A JP S648530 A JPS648530 A JP S648530A JP 16415587 A JP16415587 A JP 16415587A JP 16415587 A JP16415587 A JP 16415587A JP S648530 A JPS648530 A JP S648530A
- Authority
- JP
- Japan
- Prior art keywords
- recording
- magneto
- read
- optical
- overwriting
- 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
Links
Landscapes
- Recording Or Reproducing By Magnetic Means (AREA)
Abstract
PURPOSE:To simplify a structure and to curtail the number of parts by overwriting on a magneto-optical type recording medium by one optical pickup only. CONSTITUTION:The data control zone 35 on a magneto-optical recording medium is read to know each sector recording method corresponding to the structure of a recording file. A preformat part 31 is then read and in case of being located at a correct address (sector) position an overwriting can be done without an erasing operation by executing the shifting of an external part impressed magnetic field, the selection of the presence or absence of the delay of a recording data pulse and the waveform conversion of the recording data pulse according to the information of a previously read data control zone 35. Since the recording and reproducing of an information is enabled at real time without the need for erasing operation by only one optical pickup, the structure is simplified and the number of parts is reduced as well.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP16415587A JPS648530A (en) | 1987-07-01 | 1987-07-01 | Magneto-optical recording and reproducing device |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP16415587A JPS648530A (en) | 1987-07-01 | 1987-07-01 | Magneto-optical recording and reproducing device |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS648530A true JPS648530A (en) | 1989-01-12 |
Family
ID=15787784
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP16415587A Pending JPS648530A (en) | 1987-07-01 | 1987-07-01 | Magneto-optical recording and reproducing device |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS648530A (en) |
-
1987
- 1987-07-01 JP JP16415587A patent/JPS648530A/en active Pending
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