DE3676870D1 - Binaeres kodierverfahren fuer daten, welche von einer optischen platte gelesen werden und geraet dafuer. - Google Patents
Binaeres kodierverfahren fuer daten, welche von einer optischen platte gelesen werden und geraet dafuer.Info
- Publication number
- DE3676870D1 DE3676870D1 DE8686302928T DE3676870T DE3676870D1 DE 3676870 D1 DE3676870 D1 DE 3676870D1 DE 8686302928 T DE8686302928 T DE 8686302928T DE 3676870 T DE3676870 T DE 3676870T DE 3676870 D1 DE3676870 D1 DE 3676870D1
- Authority
- DE
- Germany
- Prior art keywords
- optical disk
- data read
- encoding method
- device therefor
- binary encoding
- 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
- G11B20/14—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)
- Optical Recording Or Reproduction (AREA)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP8569985A JPS61244131A (ja) | 1985-04-22 | 1985-04-22 | 光記録情報読取装置の出力信号二値化方式 |
JP60085698A JPS61244182A (ja) | 1985-04-22 | 1985-04-22 | ビデオ信号二値化方法および装置 |
Publications (1)
Publication Number | Publication Date |
---|---|
DE3676870D1 true DE3676870D1 (de) | 1991-02-21 |
Family
ID=26426704
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE8686302928T Expired - Fee Related DE3676870D1 (de) | 1985-04-22 | 1986-04-18 | Binaeres kodierverfahren fuer daten, welche von einer optischen platte gelesen werden und geraet dafuer. |
Country Status (3)
Country | Link |
---|---|
US (1) | US4819222A (de) |
EP (1) | EP0202773B1 (de) |
DE (1) | DE3676870D1 (de) |
Families Citing this family (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2619381B2 (ja) * | 1987-03-20 | 1997-06-11 | 株式会社日立製作所 | 光学的情報再生装置 |
JPH0233221A (ja) * | 1988-07-22 | 1990-02-02 | Matsushita Electric Ind Co Ltd | コード変換装置と復号装置 |
US5321672A (en) * | 1989-04-19 | 1994-06-14 | Hitachi, Ltd. | Method of an apparatus for magneto-optically recording information by changing the position or shape or controlling the diameter of reversed domains |
JPH04212723A (ja) * | 1990-07-31 | 1992-08-04 | Toshiba Corp | 情報記録再生装置 |
JPH05128574A (ja) * | 1991-10-31 | 1993-05-25 | Olympus Optical Co Ltd | 光学ヘツド |
JPH05128554A (ja) * | 1991-11-01 | 1993-05-25 | Olympus Optical Co Ltd | 光学的情報記録再生装置 |
JPH0795538A (ja) * | 1993-09-17 | 1995-04-07 | Canon Inc | 画像記録再生装置 |
US5648949A (en) * | 1995-02-13 | 1997-07-15 | Hitachi, Ltd. | Method and apparatus for information reproduction at variable reference level |
JP3479154B2 (ja) * | 1995-04-04 | 2003-12-15 | 株式会社アドバンテスト | 信号弁別回路 |
JP4922594B2 (ja) | 2005-05-23 | 2012-04-25 | 富士通株式会社 | 光送信装置、光受信装置、およびそれらを含む光通信システム |
Family Cites Families (21)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2451800C3 (de) * | 1973-11-09 | 1978-12-14 | N.V. Philips' Gloeilampenfabrieken, Eindhoven (Niederlande) | Spitzendetektion mit konstantem Teiloffset-Betrieb |
US3988531A (en) * | 1975-04-02 | 1976-10-26 | Zenith Radio Corporation | System for compensating for incorrect duty factor when reading out information stored in a video disc |
US4017903A (en) * | 1975-08-27 | 1977-04-12 | Hewlett-Packard Company | Pulse code modulation recording and/or reproducing system |
US4145758A (en) * | 1977-10-25 | 1979-03-20 | Drexler Technology Corporation | Error checking method and apparatus for digital data in optical recording systems |
US4269917A (en) * | 1979-07-06 | 1981-05-26 | Drexler Technology Corporation | Data storage medium having reflective particulate silver layer |
US4278756A (en) * | 1979-07-06 | 1981-07-14 | Drexler Technology Corporation | Reflective data storage medium made by silver diffusion transfer |
US4278758A (en) * | 1979-07-06 | 1981-07-14 | Drexler Technology Corporation | Process for making a reflective data storage medium |
US4264935A (en) * | 1980-04-09 | 1981-04-28 | Sperry Corporation | Balanced tapped delay line spectral shaping differentiation circuit for signal detection |
JPS56153488A (en) * | 1980-04-28 | 1981-11-27 | Mitsubishi Electric Corp | Recording device |
US4345412A (en) * | 1980-06-13 | 1982-08-24 | Balzer Winton E | Cup lidding apparatus and leakproof cup |
US4544835A (en) * | 1983-12-29 | 1985-10-01 | Drexler Technology Corporation | Data system containing a high capacity optical contrast laser recordable wallet-size plastic card |
US4360728A (en) * | 1981-02-27 | 1982-11-23 | Drexler Technology Corporation | Banking card for automatic teller machines and the like |
US4500777A (en) * | 1981-02-27 | 1985-02-19 | Drexler Technology Corporation | High data capacity, scratch and dust resistant, infrared, read-write data card for automatic teller machines |
US4542288A (en) * | 1981-02-27 | 1985-09-17 | Drexler Technology Corporation | Method for making a laser recordable wallet-size plastic card |
US4346412A (en) * | 1981-04-21 | 1982-08-24 | Magnetic Peripherals, Inc. | Read signal processing circuit |
US4385372A (en) * | 1981-05-01 | 1983-05-24 | Drexler Technology Corporation | Reflective optical data storage and laser recording media having grooved dielectric encoded prerecorded information |
JPS5848209A (ja) * | 1981-09-14 | 1983-03-22 | Sony Corp | 情報信号有無判別回路装置 |
DE3272034D1 (en) * | 1981-10-14 | 1986-08-21 | Hitachi Ltd | Digital player for reproducing a digital signal sequence |
NL8303561A (nl) * | 1983-10-17 | 1985-05-17 | Philips Nv | Geregelde oscillatorschakeling. |
NL8303859A (nl) * | 1983-11-10 | 1985-06-03 | Philips Nv | Selektief scramblen bij compact disc. |
JPS60247836A (ja) * | 1984-05-22 | 1985-12-07 | Nippon Gakki Seizo Kk | 光学式情報再生装置 |
-
1986
- 1986-04-18 DE DE8686302928T patent/DE3676870D1/de not_active Expired - Fee Related
- 1986-04-18 EP EP86302928A patent/EP0202773B1/de not_active Expired
- 1986-04-21 US US06/853,913 patent/US4819222A/en not_active Expired - Fee Related
Also Published As
Publication number | Publication date |
---|---|
EP0202773B1 (de) | 1991-01-16 |
US4819222A (en) | 1989-04-04 |
EP0202773A1 (de) | 1986-11-26 |
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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 |