JPS57200911A - Recording medium and erasure preventing method for its recording information - Google Patents

Recording medium and erasure preventing method for its recording information

Info

Publication number
JPS57200911A
JPS57200911A JP8614981A JP8614981A JPS57200911A JP S57200911 A JPS57200911 A JP S57200911A JP 8614981 A JP8614981 A JP 8614981A JP 8614981 A JP8614981 A JP 8614981A JP S57200911 A JPS57200911 A JP S57200911A
Authority
JP
Japan
Prior art keywords
signal
erasure
recording
carriage motor
information
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
JP8614981A
Other languages
English (en)
Inventor
Mikio Kanai
Hideki Hatano
Takasumi Tajiri
Masaru Otaki
Shigeru Kato
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.)
Pioneer Corp
Original Assignee
Pioneer Corp
Pioneer Electronic 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 Pioneer Corp, Pioneer Electronic Corp filed Critical Pioneer Corp
Priority to JP8614981A priority Critical patent/JPS57200911A/ja
Priority to US06/384,674 priority patent/US4554651A/en
Priority to GB08216334A priority patent/GB2101793B/en
Priority to DE19823221147 priority patent/DE3221147A1/de
Publication of JPS57200911A publication Critical patent/JPS57200911A/ja
Pending legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
    • G11B7/007—Arrangement of the information on the record carrier, e.g. form of tracks, actual track shape, e.g. wobbled, or cross-section, e.g. v-shaped; Sequential information structures, e.g. sectoring or header formats within a track

Landscapes

  • Digital Magnetic Recording (AREA)
  • Recording Or Reproducing By Magnetic Means (AREA)
JP8614981A 1981-06-04 1981-06-04 Recording medium and erasure preventing method for its recording information Pending JPS57200911A (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
JP8614981A JPS57200911A (en) 1981-06-04 1981-06-04 Recording medium and erasure preventing method for its recording information
US06/384,674 US4554651A (en) 1981-06-04 1982-06-02 Magneto-optical recording medium and method for preventing the erasing of the information recorded on the magneto-optical recording medium
GB08216334A GB2101793B (en) 1981-06-04 1982-06-04 Magneto-optical recording medium and method for preventing the erasing of the information recorded on the magneto-optical recording medium
DE19823221147 DE3221147A1 (de) 1981-06-04 1982-06-04 Optischer aufzeichnungstraeger und verfahren zum verhindern des loeschens der auf einen derartigen traeger aufgezeichnten information

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP8614981A JPS57200911A (en) 1981-06-04 1981-06-04 Recording medium and erasure preventing method for its recording information

Publications (1)

Publication Number Publication Date
JPS57200911A true JPS57200911A (en) 1982-12-09

Family

ID=13878677

Family Applications (1)

Application Number Title Priority Date Filing Date
JP8614981A Pending JPS57200911A (en) 1981-06-04 1981-06-04 Recording medium and erasure preventing method for its recording information

Country Status (1)

Country Link
JP (1) JPS57200911A (ja)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62120662A (ja) * 1985-11-20 1987-06-01 Matsushita Electric Ind Co Ltd 書換え可能光デイスクの書込み禁止方法

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62120662A (ja) * 1985-11-20 1987-06-01 Matsushita Electric Ind Co Ltd 書換え可能光デイスクの書込み禁止方法

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