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
  • G11B20/1423—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
  • 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
  • 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)

Applications Claiming Priority (1)

Publications (2)

Family

ID=19834645

Family Applications (1)

Country Status (21)

Families Citing this family (17)

Family Cites Families (4)

• 1980
  • 1980-01-09 NL NL8000124A patent/NL8000124A/nl not_active Application Discontinuation
  • 1980-03-24 US US06/132,743 patent/US4326282A/en not_active Expired - Lifetime
  • 1980-12-10 ZA ZA00807747A patent/ZA807747B/xx unknown
  • 1980-12-30 AR AR80283845A patent/AR247456A1/es active
• 1981
  • 1981-01-05 GB GB8100126A patent/GB2067819B/en not_active Expired
  • 1981-01-05 ES ES498335A patent/ES498335A0/es active Granted
  • 1981-01-05 MX MX185469A patent/MX149419A/es unknown
  • 1981-01-06 IT IT19023/81A patent/IT1134951B/it active
  • 1981-01-06 DK DK3581A patent/DK3581A/da not_active Application Discontinuation
  • 1981-01-06 AU AU65992/81A patent/AU534548B2/en not_active Ceased
  • 1981-01-06 JP JP19281A patent/JPS56101653A/ja active Pending
  • 1981-01-06 DD DD81226850A patent/DD157229A5/de unknown
  • 1981-01-06 BR BR8100045A patent/BR8100045A/pt unknown
  • 1981-01-07 SE SE8100031D patent/SE8100031L/xx not_active Application Discontinuation
  • 1981-01-07 BE BE0/203424A patent/BE886994A/fr not_active IP Right Cessation
  • 1981-01-07 FR FR8100150A patent/FR2473771B1/fr not_active Expired
  • 1981-01-07 CA CA000368013A patent/CA1163367A/en not_active Expired
  • 1981-01-07 SE SE8100031A patent/SE447769B/sv not_active IP Right Cessation
  • 1981-01-08 DE DE19813100328 patent/DE3100328A1/de not_active Withdrawn
  • 1981-01-09 AT AT0005981A patent/AT370546B/de not_active IP Right Cessation
• 1984
  • 1984-03-12 SG SG222/84A patent/SG22284G/en unknown
• 1985
  • 1985-05-23 HK HK405/85A patent/HK40585A/xx unknown

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