JPS59188844A - デイスク装置 - Google Patents

デイスク装置

Info

Publication number
JPS59188844A
JPS59188844A JP6413383A JP6413383A JPS59188844A JP S59188844 A JPS59188844 A JP S59188844A JP 6413383 A JP6413383 A JP 6413383A JP 6413383 A JP6413383 A JP 6413383A JP S59188844 A JPS59188844 A JP S59188844A
Authority
JP
Japan
Prior art keywords
area
recorded
indicator
address
detector
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
JP6413383A
Other languages
English (en)
Japanese (ja)
Other versions
JPH0321986B2 (enrdf_load_stackoverflow
Inventor
Yoshihiro Hamura
端村　美宏
Shinji Okada
真次 岡田
Eiji Kaneko
英治 金子
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.)
Fujitsu Ltd
Original Assignee
Fujitsu 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 Fujitsu Ltd filed Critical Fujitsu Ltd
Priority to JP6413383A priority Critical patent/JPS59188844A/ja
Publication of JPS59188844A publication Critical patent/JPS59188844A/ja
Publication of JPH0321986B2 publication Critical patent/JPH0321986B2/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
    • G11B20/00—Signal processing not specific to the method of recording or reproducing; Circuits therefor
    • G11B20/10—Digital recording or reproducing
    • G11B20/14—Digital recording or reproducing using self-clocking codes
    • G11B20/1403—Digital recording or reproducing using self-clocking codes characterised by the use of two levels
    • G11B20/1407—Digital recording or reproducing using self-clocking codes characterised by the use of two levels code representation depending on a single bit, i.e. where a one is always represented by a first code symbol while a zero is always represented by a second code symbol
    • G11B20/1419—Digital recording or reproducing using self-clocking codes characterised by the use of two levels code representation depending on a single bit, i.e. where a one is always represented by a first code symbol while a zero is always represented by a second code symbol to or from biphase level coding, i.e. to or from codes where a one is coded as a transition from a high to a low level during the middle of a bit cell and a zero is encoded as a transition from a low to a high level during the middle of a bit cell or vice versa, e.g. split phase code, Manchester code conversion to or from biphase space or mark coding, i.e. to or from codes where there is a transition at the beginning of every bit cell and a one has no second transition and a zero has a second transition one half of a bit period later or vice versa, e.g. double frequency code, FM code
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B20/00—Signal processing not specific to the method of recording or reproducing; Circuits therefor
    • G11B20/10—Digital recording or reproducing
    • G11B20/14—Digital recording or reproducing using self-clocking codes
    • G11B20/1403—Digital recording or reproducing using self-clocking codes characterised by the use of two levels
    • G11B20/1423—Code representation depending on subsequent bits, e.g. delay modulation, double density code, Miller code
    • 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
    • G11B7/004—Recording, reproducing or erasing methods; Read, write or erase circuits therefor
    • G11B7/005—Reproducing

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Optical Recording Or Reproduction (AREA)
  • Signal Processing For Digital Recording And Reproducing (AREA)
JP6413383A 1983-04-12 1983-04-12 デイスク装置 Granted JPS59188844A (ja)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP6413383A JPS59188844A (ja) 1983-04-12 1983-04-12 デイスク装置

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP6413383A JPS59188844A (ja) 1983-04-12 1983-04-12 デイスク装置

Publications (2)

Publication Number Publication Date
JPS59188844A true JPS59188844A (ja) 1984-10-26
JPH0321986B2 JPH0321986B2 (enrdf_load_stackoverflow) 1991-03-25

Family

ID=13249265

Family Applications (1)

Application Number Title Priority Date Filing Date
JP6413383A Granted JPS59188844A (ja) 1983-04-12 1983-04-12 デイスク装置

Country Status (1)

Country Link
JP (1) JPS59188844A (enrdf_load_stackoverflow)

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57172533A (en) * 1981-04-17 1982-10-23 Matsushita Electric Ind Co Ltd Optical information recording and reproducing device

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57172533A (en) * 1981-04-17 1982-10-23 Matsushita Electric Ind Co Ltd Optical information recording and reproducing device

Also Published As

Publication number Publication date
JPH0321986B2 (enrdf_load_stackoverflow) 1991-03-25

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