AU1745897A - Optical disk reader - Google Patents

Optical disk reader

Info

Publication number
AU1745897A
AU1745897A AU17458/97A AU1745897A AU1745897A AU 1745897 A AU1745897 A AU 1745897A AU 17458/97 A AU17458/97 A AU 17458/97A AU 1745897 A AU1745897 A AU 1745897A AU 1745897 A AU1745897 A AU 1745897A
Authority
AU
Australia
Prior art keywords
optical disk
disk reader
reader
optical
disk
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.)
Abandoned
Application number
AU17458/97A
Inventor
Bruce V. Johnson
Gregory A. Mcdermott
Michael P O'Neill
Cezary Pietrzyk
Steven R. Spielman
Terrence L. Wong
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.)
Calimetrics Inc
Original Assignee
Calimetrics Inc
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
Priority claimed from US08/583,651 external-priority patent/US5854779A/en
Application filed by Calimetrics Inc filed Critical Calimetrics Inc
Publication of AU1745897A publication Critical patent/AU1745897A/en
Abandoned 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
    • G11B20/10009—Improvement or modification of read or write signals
    • 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
    • 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
    • G11B20/1496—Digital recording or reproducing using self-clocking codes characterised by the use of more than three levels
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B27/00—Editing; Indexing; Addressing; Timing or synchronising; Monitoring; Measuring tape travel
    • G11B27/10—Indexing; Addressing; Timing or synchronising; Measuring tape travel
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B27/00—Editing; Indexing; Addressing; Timing or synchronising; Monitoring; Measuring tape travel
    • G11B27/10—Indexing; Addressing; Timing or synchronising; Measuring tape travel
    • G11B27/19—Indexing; Addressing; Timing or synchronising; Measuring tape travel by using information detectable on the record carrier
    • G11B27/28—Indexing; Addressing; Timing or synchronising; Measuring tape travel by using information detectable on the record carrier by using information signals recorded by the same method as the main recording
    • G11B27/30—Indexing; Addressing; Timing or synchronising; Measuring tape travel by using information detectable on the record carrier by using information signals recorded by the same method as the main recording on the same track as the main recording
    • G11B27/3027—Indexing; Addressing; Timing or synchronising; Measuring tape travel by using information detectable on the record carrier by using information signals recorded by the same method as the main recording on the same track as the main recording used signal is digitally coded
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B27/00—Editing; Indexing; Addressing; Timing or synchronising; Monitoring; Measuring tape travel
    • G11B27/36—Monitoring, i.e. supervising the progress of recording or reproducing
    • 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
    • G11B7/0052—Reproducing involving reflectivity, absorption or colour changes

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Optical Recording Or Reproduction (AREA)
AU17458/97A 1996-01-05 1997-01-03 Optical disk reader Abandoned AU1745897A (en)

Applications Claiming Priority (5)

Application Number Priority Date Filing Date Title
US620196 1984-06-13
US583651 1996-01-05
US08/583,651 US5854779A (en) 1996-01-05 1996-01-05 Optical disc reader for reading multiple levels of pits on an optical disc
US62019696A 1996-03-22 1996-03-22
PCT/US1997/000290 WO1997025709A2 (en) 1996-01-05 1997-01-03 Optical disk reader

Publications (1)

Publication Number Publication Date
AU1745897A true AU1745897A (en) 1997-08-01

Family

ID=27078867

Family Applications (1)

Application Number Title Priority Date Filing Date
AU17458/97A Abandoned AU1745897A (en) 1996-01-05 1997-01-03 Optical disk reader

Country Status (2)

Country Link
AU (1) AU1745897A (en)
WO (1) WO1997025709A2 (en)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AU2003202506B2 (en) * 1997-09-10 2006-07-06 Wea Manufacturing Inc. Dual data recorded compact disc
DE69729895T2 (en) * 1997-09-10 2005-08-25 Wea Mfg. Inc. COMPACT DISC RECORDED WITH TWO-DIMENSIONAL DATA
US7046610B2 (en) * 2002-04-24 2006-05-16 Ricoh Company, Ltd. Recording medium suitable for recording/reproducing multi-level data
KR20050029765A (en) * 2003-09-22 2005-03-28 삼성전자주식회사 High density readable only optical disc and method for preparing the same
US7164646B2 (en) * 2004-02-19 2007-01-16 Hewlett-Packard Development Company, L.P. Storage device having a storage cell programmable to one of more than two storage states

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2613199B2 (en) * 1986-12-10 1997-05-21 株式会社日立製作所 Information reproducing method and optical disk
JP2602860B2 (en) * 1987-12-16 1997-04-23 株式会社東芝 Optical information recording / reproducing device
US5235587A (en) * 1989-09-29 1993-08-10 The Regents Of The University Of California Optical data storage apparatus and method
US5408456A (en) * 1990-02-02 1995-04-18 Canon Kabushiki Kaisha Data reproducing method and apparatus for determining the interval between pits on a recording medium from a modulated read-out signal
JP2708597B2 (en) * 1990-02-15 1998-02-04 キヤノン株式会社 Optical information recording / reproducing method
JPH04209320A (en) * 1990-11-30 1992-07-30 Toshiba Corp Information reproducing device
US5761171A (en) * 1994-10-24 1998-06-02 Sony Corporation Generating data detecting threshold levels from reference patterns recorded in an optical disk, such as a magneto-optical disk

Also Published As

Publication number Publication date
WO1997025709A2 (en) 1997-07-17
WO1997025709A3 (en) 1997-09-18

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