JPH0321986B2 - - Google Patents
Info
- Publication number
- JPH0321986B2 JPH0321986B2 JP58064133A JP6413383A JPH0321986B2 JP H0321986 B2 JPH0321986 B2 JP H0321986B2 JP 58064133 A JP58064133 A JP 58064133A JP 6413383 A JP6413383 A JP 6413383A JP H0321986 B2 JPH0321986 B2 JP H0321986B2
- Authority
- JP
- Japan
- Prior art keywords
- area
- indicator
- detector
- recorded
- information
- 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 - Lifetime
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
-
- 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
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Signal Processing For Digital Recording And Reproducing (AREA)
- Optical Recording Or Reproduction (AREA)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6413383A JPS59188844A (ja) | 1983-04-12 | 1983-04-12 | デイスク装置 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6413383A JPS59188844A (ja) | 1983-04-12 | 1983-04-12 | デイスク装置 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS59188844A JPS59188844A (ja) | 1984-10-26 |
| JPH0321986B2 true JPH0321986B2 (en]) | 1991-03-25 |
Family
ID=13249265
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP6413383A Granted JPS59188844A (ja) | 1983-04-12 | 1983-04-12 | デイスク装置 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS59188844A (en]) |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS57172533A (en) * | 1981-04-17 | 1982-10-23 | Matsushita Electric Ind Co Ltd | Optical information recording and reproducing device |
-
1983
- 1983-04-12 JP JP6413383A patent/JPS59188844A/ja active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS59188844A (ja) | 1984-10-26 |
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