DE68921349D1 - Selbcompensierendes aufzeichnungs- und wiedergabeverfahren für daten hoher dichte. - Google Patents

Selbcompensierendes aufzeichnungs- und wiedergabeverfahren für daten hoher dichte.

Info

Publication number
DE68921349D1
DE68921349D1 DE68921349T DE68921349T DE68921349D1 DE 68921349 D1 DE68921349 D1 DE 68921349D1 DE 68921349 T DE68921349 T DE 68921349T DE 68921349 T DE68921349 T DE 68921349T DE 68921349 D1 DE68921349 D1 DE 68921349D1
Authority
DE
Germany
Prior art keywords
self
high density
density data
playback method
compensating recording
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.)
Expired - Fee Related
Application number
DE68921349T
Other languages
English (en)
Other versions
DE68921349T2 (de
Inventor
John Bizjak
Michael Hassel
David Niemann
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.)
BRIER TECHNOLOGY
Original Assignee
BRIER TECHNOLOGY
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 BRIER TECHNOLOGY filed Critical BRIER TECHNOLOGY
Publication of DE68921349D1 publication Critical patent/DE68921349D1/de
Application granted granted Critical
Publication of DE68921349T2 publication Critical patent/DE68921349T2/de
Anticipated expiration legal-status Critical
Expired - Fee Related 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
    • 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

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Digital Magnetic Recording (AREA)
  • Signal Processing For Digital Recording And Reproducing (AREA)
DE68921349T 1988-11-14 1989-11-13 Selbcompensierendes aufzeichnungs- und wiedergabeverfahren für daten hoher dichte. Expired - Fee Related DE68921349T2 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US07/270,748 US4987500A (en) 1988-11-14 1988-11-14 Self compensating high density data recording and detection scheme
PCT/US1989/005120 WO1990005975A1 (en) 1988-11-14 1989-11-13 Self-compensating high density data recording and detection scheme

Publications (2)

Publication Number Publication Date
DE68921349D1 true DE68921349D1 (de) 1995-03-30
DE68921349T2 DE68921349T2 (de) 1995-10-05

Family

ID=23032634

Family Applications (1)

Application Number Title Priority Date Filing Date
DE68921349T Expired - Fee Related DE68921349T2 (de) 1988-11-14 1989-11-13 Selbcompensierendes aufzeichnungs- und wiedergabeverfahren für daten hoher dichte.

Country Status (6)

Country Link
US (1) US4987500A (de)
EP (1) EP0449853B1 (de)
JP (1) JP2741633B2 (de)
AU (1) AU4641889A (de)
DE (1) DE68921349T2 (de)
WO (1) WO1990005975A1 (de)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5594597A (en) * 1991-11-01 1997-01-14 Iomega Corporation Neural network disk drive read channel pattern detector
US5388011A (en) * 1992-05-20 1995-02-07 Wangtek, Inc. Peak detector with look ahead
US5420726A (en) * 1994-02-17 1995-05-30 Maxtor Corporation Channel qualifier for a hard disk drive which differentiates a raw data signal before peak detection and qualification of the signal
WO2000016240A1 (en) * 1998-09-14 2000-03-23 Psc Scanning, Inc. Fast edge detection system tolerant of high degree of intersymbol interference

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3603942A (en) * 1969-01-13 1971-09-07 Ibm Predifferentiated recording
US3767938A (en) * 1972-05-26 1973-10-23 Ibm Zero sense after peak detection circuit
DE2925129A1 (de) * 1979-06-22 1981-01-08 Daimler Benz Ag Vorrichtung zum regenerieren von signalen
US4495529A (en) * 1982-05-07 1985-01-22 Digital Equipment Corporation Qualifier circuit
US4635142A (en) * 1983-11-22 1987-01-06 Storage Technology Corporation Amplitude sensor with adaptive threshold generation
JPS61120380A (ja) * 1984-11-16 1986-06-07 Sony Corp デジタル信号処理回路
IE883775L (en) * 1988-12-19 1990-06-19 Ocorralk Ltd Signal wave form converting circuit

Also Published As

Publication number Publication date
US4987500A (en) 1991-01-22
JP2741633B2 (ja) 1998-04-22
JPH04504775A (ja) 1992-08-20
EP0449853A1 (de) 1991-10-09
EP0449853B1 (de) 1995-02-22
EP0449853A4 (en) 1992-06-03
DE68921349T2 (de) 1995-10-05
WO1990005975A1 (en) 1990-05-31
AU4641889A (en) 1990-06-12

Similar Documents

Publication Publication Date Title
GB2149560B (en) Method of and apparatus for, recording and/or reproducing information in or from an optical record carrier
IL90323A0 (en) Method,apparatus and medium for recording and reproducing information
DE69021227D1 (de) Daten-Aufzeichnungs- und -Wiedergabegerät.
GB2170632B (en) Optical information recording medium and apparatus for recording/reproducing information using the same
KR860005341A (ko) 광학 정보 메모리 매체 및 정보의 기록 및 소거용 장치 및 방법
AU1434188A (en) Apparatus for recording and/or reproducing digital data information
ZA822011B (en) Apparatus for recording and reading information tracks in an optical record carrier
EP0178657A3 (en) Apparatus for recording and/or reproducing data signal on or from disk sharped recording medium
DE3574302D1 (en) Optical head apparatus for recording and reproducing data on a recording medium
DE3682412D1 (de) Digitales datenaufzeichnungs- und -wiedergabeverfahren.
DE68922185D1 (de) Optischer Informationsaufzeichnungsträger und Verfahren zu seiner Herstellung.
EP0175308A3 (en) Recording disk data playback apparatus
GB8503220D0 (en) Data recording & reproducing method
KR870007500A (ko) 디지탈 정보 기록재생 방법 및 그 장치
EP0243976A3 (en) Method for recording, reproducing and erasing information and thin film for recording information
KR900000859A (ko) 광정보 기록 재생 방법 및 그의 장치
DE68914230D1 (de) Lesesystem für aufgezeichnete Daten.
DE3472322D1 (en) Optical information recording and reproducing apparatus
EP0174666A3 (en) Recording disk data playback apparatus
DE69321037T2 (de) Gerät- und Aufzeichnungsmethode für digitalen Daten
DE68921169D1 (de) Programmredigierverfahren und -gerät für ein Informationsaufzeichnungswiedergabegerät.
DE68920380D1 (de) Aufzeichnungsmedium für optische Daten und Herstellungsgerät und -methode dafür.
GB2174530B (en) Optical information recording medium and method for recording information on said medium and reproducing information therefrom
DE69022763D1 (de) Aufzeichnungs- und Wiedergabeschaltung für Daten.
GB2166318B (en) Recording disk data playback apparatus

Legal Events

Date Code Title Description
8364 No opposition during term of opposition
8339 Ceased/non-payment of the annual fee