DE69210428D1 - Symmetrie-Apparat für ein EFM-Signal - Google Patents
Symmetrie-Apparat für ein EFM-SignalInfo
- Publication number
- DE69210428D1 DE69210428D1 DE69210428T DE69210428T DE69210428D1 DE 69210428 D1 DE69210428 D1 DE 69210428D1 DE 69210428 T DE69210428 T DE 69210428T DE 69210428 T DE69210428 T DE 69210428T DE 69210428 D1 DE69210428 D1 DE 69210428D1
- Authority
- DE
- Germany
- Prior art keywords
- efm signal
- symmetry
- symmetry apparatus
- efm
- signal
- 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
- G11B20/10—Digital recording or reproducing
- G11B20/10009—Improvement or modification of read or write signals
- G11B20/10046—Improvement or modification of read or write signals filtering or equalising, e.g. setting the tap weights of an FIR filter
- G11B20/10194—Improvement or modification of read or write signals filtering or equalising, e.g. setting the tap weights of an FIR filter using predistortion during writing
-
- 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
- G11B20/1423—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
- 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
- G11B7/0045—Recording
-
- 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
- G11B7/24—Record carriers characterised by shape, structure or physical properties, or by the selection of the material
- G11B7/2407—Tracks or pits; Shape, structure or physical properties thereof
- G11B7/24085—Pits
-
- 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
- G11B2020/1461—8 to 14 modulation, e.g. the EFM code used on CDs or mini-discs
Landscapes
- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Signal Processing For Digital Recording And Reproducing (AREA)
- Optical Recording Or Reproduction (AREA)
- Signal Processing Not Specific To The Method Of Recording And Reproducing (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP1991014106U JP2556725Y2 (ja) | 1991-01-30 | 1991-01-30 | シンメトリ装置 |
Publications (2)
Publication Number | Publication Date |
---|---|
DE69210428D1 true DE69210428D1 (de) | 1996-06-13 |
DE69210428T2 DE69210428T2 (de) | 1997-01-02 |
Family
ID=11851870
Family Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE199292101481T Pending DE497321T1 (de) | 1991-01-30 | 1992-01-29 | Symmetrie-apparat fuer ein efm-signal. |
DE69210428T Expired - Fee Related DE69210428T2 (de) | 1991-01-30 | 1992-01-29 | Symmetrie-Apparat für ein EFM-Signal |
Family Applications Before (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE199292101481T Pending DE497321T1 (de) | 1991-01-30 | 1992-01-29 | Symmetrie-apparat fuer ein efm-signal. |
Country Status (4)
Country | Link |
---|---|
US (1) | US5272687A (de) |
EP (1) | EP0497321B1 (de) |
JP (1) | JP2556725Y2 (de) |
DE (2) | DE497321T1 (de) |
Families Citing this family (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
BE1007029A3 (nl) * | 1993-04-22 | 1995-02-21 | Koninkl Philips Electronics Nv | Werkwijze voor het afleiden van een kwaliteitssignaal uit een uitgelezen signaal, alsmede een optekeninrichting en een uitleesinrichting waarin een dergelijke werkwijze wordt toegepast. |
JP4717208B2 (ja) | 1998-02-27 | 2011-07-06 | ダグ カーソン アンド アソシエーツ,インク. | 光ディスクマスタ作成プロセスにおけるピットおよびランド遷移ロケーションの個別調整方法、およびそのための最適化回路 |
US6445661B1 (en) * | 1999-08-11 | 2002-09-03 | Oak Technology, Inc. | Circuit, disk controller and method for calibrating a high precision delay of an input signal |
US7568081B2 (en) * | 2000-11-15 | 2009-07-28 | Doug Carson & Associates, Inc. | Authenticating a data storage medium using predetermined inter-sector relationships |
US6477124B2 (en) | 2000-11-15 | 2002-11-05 | Doug Carson & Associates, Inc. | Varying the rate at which data appear on an optical disc rotated at a constant linear velocity to prevent unauthorized duplication of the disc |
US6710622B1 (en) * | 2002-04-12 | 2004-03-23 | National Semiconductor Corp | Programmable digital one-shot |
Family Cites Families (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5778637A (en) * | 1980-10-31 | 1982-05-17 | Matsushita Electric Ind Co Ltd | Optical information recorder |
JPS5956208A (ja) * | 1982-09-27 | 1984-03-31 | Fujitsu Ltd | 変調回路 |
JPS5977608A (ja) * | 1982-10-27 | 1984-05-04 | Hitachi Ltd | 記録タイミング補正 |
EP0171022A3 (de) * | 1984-07-31 | 1988-02-03 | Yamaha Corporation | Signalverzögerungsvorrichtung |
US4691254A (en) * | 1985-06-24 | 1987-09-01 | Priam Corporation | Data processing system including encoder, decoder and write precompensator, using run length limited code |
US4669004A (en) * | 1986-02-27 | 1987-05-26 | Quantum Corporation | High capacity disk file with embedded sector servo |
JPS62298234A (ja) * | 1986-06-13 | 1987-12-25 | インタ−ナショナル ビジネス マシ−ンズ コ−ポレ−ション | 非対称ランレングス制限コ−ド化方法 |
US4928187A (en) * | 1987-02-20 | 1990-05-22 | Laserdrive Limited | Method and apparatus for encoding and decoding binary data |
-
1991
- 1991-01-30 JP JP1991014106U patent/JP2556725Y2/ja not_active Expired - Fee Related
-
1992
- 1992-01-22 US US07/824,141 patent/US5272687A/en not_active Expired - Fee Related
- 1992-01-29 EP EP92101481A patent/EP0497321B1/de not_active Expired - Lifetime
- 1992-01-29 DE DE199292101481T patent/DE497321T1/de active Pending
- 1992-01-29 DE DE69210428T patent/DE69210428T2/de not_active Expired - Fee Related
Also Published As
Publication number | Publication date |
---|---|
US5272687A (en) | 1993-12-21 |
EP0497321B1 (de) | 1996-05-08 |
EP0497321A3 (en) | 1993-12-01 |
EP0497321A2 (de) | 1992-08-05 |
DE69210428T2 (de) | 1997-01-02 |
JP2556725Y2 (ja) | 1997-12-08 |
DE497321T1 (de) | 1992-11-26 |
JPH04101953U (ja) | 1992-09-02 |
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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 |