DE3853037T2 - Gerät zur Wiedergabe von digitalen Daten. - Google Patents
Gerät zur Wiedergabe von digitalen Daten.Info
- Publication number
- DE3853037T2 DE3853037T2 DE3853037T DE3853037T DE3853037T2 DE 3853037 T2 DE3853037 T2 DE 3853037T2 DE 3853037 T DE3853037 T DE 3853037T DE 3853037 T DE3853037 T DE 3853037T DE 3853037 T2 DE3853037 T2 DE 3853037T2
- Authority
- DE
- Germany
- Prior art keywords
- digital data
- reproducing digital
- magnetic medium
- modulations
- record
- 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
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
- G11B20/02—Analogue recording or reproducing
- G11B20/06—Angle-modulation recording or reproducing
-
- 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
- G11B20/10222—Improvement or modification of read or write signals clock-related aspects, e.g. phase or frequency adjustment or bit synchronisation
-
- 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
-
- 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
- G11B20/1426—Code representation depending on subsequent bits, e.g. delay modulation, double density code, Miller code conversion to or from block codes or representations thereof
-
- 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
-
- 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
- G11B20/1426—Code representation depending on subsequent bits, e.g. delay modulation, double density code, Miller code conversion to or from block codes or representations thereof
- G11B2020/1438—8 to 10 modulation
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62246916A JP2661064B2 (ja) | 1987-09-30 | 1987-09-30 | データ再生装置 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| DE3853037D1 DE3853037D1 (de) | 1995-03-23 |
| DE3853037T2 true DE3853037T2 (de) | 1995-06-14 |
Family
ID=17155659
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DE3853037T Expired - Fee Related DE3853037T2 (de) | 1987-09-30 | 1988-09-30 | Gerät zur Wiedergabe von digitalen Daten. |
Country Status (6)
| Country | Link |
|---|---|
| US (1) | US4912573A (de) |
| EP (1) | EP0310442B1 (de) |
| JP (1) | JP2661064B2 (de) |
| KR (1) | KR890005714A (de) |
| AT (1) | ATE118639T1 (de) |
| DE (1) | DE3853037T2 (de) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2819294B2 (ja) * | 1988-09-29 | 1998-10-30 | キヤノン株式会社 | デジタル情報再生装置 |
| JP3347468B2 (ja) * | 1994-04-20 | 2002-11-20 | キヤノン株式会社 | 情報再生装置 |
| JPH07312041A (ja) * | 1994-05-17 | 1995-11-28 | Sony Corp | ディジタル信号再生装置 |
| US6894858B1 (en) * | 2002-08-06 | 2005-05-17 | Storage Technology Corporation | Read equalizer optimization based on the PTR effects to write equalization |
| US8312310B2 (en) * | 2007-05-01 | 2012-11-13 | Canon Kabushiki Kaisha | Apparatus and method for changing clock frequency and modulation method based on current state |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3705398A (en) * | 1970-08-11 | 1972-12-05 | Odetics Inc | Digital format converter |
| IT1072341B (it) * | 1976-05-20 | 1985-04-10 | Olivetti & Co Spa | Circuito e metodo per la discriminazione in lettura di dati preregistrati con codici diversi |
| JPS563421A (en) * | 1979-06-21 | 1981-01-14 | Canon Inc | Signal converting device |
| US4365210A (en) * | 1980-06-26 | 1982-12-21 | Motorola, Inc. | Data and clock recovery system having a phase-locked-loop and which controls dynamic loop response of a data stream of unknown data format |
| CA1161946A (en) * | 1980-07-26 | 1984-02-07 | Sony Corporation | Method and apparatus for recording digitized information on a record medium |
| DE3046660A1 (de) * | 1980-12-11 | 1982-07-15 | Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt | Digitales speichersystem |
| JPS5977633A (ja) * | 1982-10-26 | 1984-05-04 | Nippon Gakki Seizo Kk | デイスク再生装置におけるクロツク再生回路 |
-
1987
- 1987-09-30 JP JP62246916A patent/JP2661064B2/ja not_active Expired - Fee Related
-
1988
- 1988-09-23 US US07/248,372 patent/US4912573A/en not_active Expired - Lifetime
- 1988-09-30 KR KR1019880012713A patent/KR890005714A/ko not_active Application Discontinuation
- 1988-09-30 EP EP88309145A patent/EP0310442B1/de not_active Expired - Lifetime
- 1988-09-30 DE DE3853037T patent/DE3853037T2/de not_active Expired - Fee Related
- 1988-09-30 AT AT88309145T patent/ATE118639T1/de not_active IP Right Cessation
Also Published As
| Publication number | Publication date |
|---|---|
| EP0310442A2 (de) | 1989-04-05 |
| ATE118639T1 (de) | 1995-03-15 |
| EP0310442A3 (de) | 1991-06-05 |
| US4912573A (en) | 1990-03-27 |
| JPS6489083A (en) | 1989-04-03 |
| KR890005714A (ko) | 1989-05-16 |
| DE3853037D1 (de) | 1995-03-23 |
| JP2661064B2 (ja) | 1997-10-08 |
| EP0310442B1 (de) | 1995-02-15 |
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| Publication | Publication Date | Title |
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| JPS6439632A (en) | Information signal recorder/reader | |
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| EP0260114A3 (en) | Opto-magnetic signal reproducing apparatus for reading, by differential detection using a magneto-optical effect, information magnetically recorded on a record medium | |
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| EP0216293A3 (en) | Process for recording a signal on a magnetic tape | |
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| ATE141708T1 (de) | Magnetisches aufnahme- und wiedergabegerät | |
| JPS6410466A (en) | Data recording and reproducing method for magnetic disk | |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| 8364 | No opposition during term of opposition | ||
| 8339 | Ceased/non-payment of the annual fee |