CH483690A - Dispositif d'enregistrement magnétique - Google Patents
Dispositif d'enregistrement magnétiqueInfo
- Publication number
- CH483690A CH483690A CH1951668A CH1951668A CH483690A CH 483690 A CH483690 A CH 483690A CH 1951668 A CH1951668 A CH 1951668A CH 1951668 A CH1951668 A CH 1951668A CH 483690 A CH483690 A CH 483690A
- Authority
- CH
- Switzerland
- Prior art keywords
- magnetic recording
- recording device
- magnetic
- recording
- Prior art date
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)
- Digital Magnetic Recording (AREA)
- Signal Processing For Digital Recording And Reproducing (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US69565268A | 1968-01-04 | 1968-01-04 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CH483690A true CH483690A (fr) | 1969-12-31 |
Family
ID=24793917
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CH1951668A CH483690A (fr) | 1968-01-04 | 1968-12-24 | Dispositif d'enregistrement magnétique |
Country Status (9)
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3634855A (en) * | 1969-05-05 | 1972-01-11 | Wendell S Miller | Self-clocking multilevel data coding system |
| US4201942A (en) * | 1978-03-08 | 1980-05-06 | Downer Edward W | Data conversion system |
| US4951049A (en) * | 1989-03-22 | 1990-08-21 | Eastman Kodak Company | Self clocking binary information encoder |
| US4954825A (en) * | 1989-03-22 | 1990-09-04 | Eastman Kodak Company | Self clocking binary data encoding/decoding method |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| BE626685A (US07534539-20090519-C00280.png) * | 1962-01-11 | |||
| US3423744A (en) * | 1965-05-24 | 1969-01-21 | Ncr Co | Binary magnetic recording system |
-
1968
- 1968-01-04 US US695652A patent/US3518700A/en not_active Expired - Lifetime
- 1968-12-13 GB GB59327/68A patent/GB1194450A/en not_active Expired
- 1968-12-13 NL NL6817968A patent/NL6817968A/xx unknown
- 1968-12-19 SE SE17459/68A patent/SE335641B/xx unknown
- 1968-12-23 FR FR1598014D patent/FR1598014A/fr not_active Expired
- 1968-12-24 CH CH1951668A patent/CH483690A/fr not_active IP Right Cessation
- 1968-12-27 BE BE726072D patent/BE726072A/xx unknown
-
1969
- 1969-01-02 DE DE1900099A patent/DE1900099C3/de not_active Expired
- 1969-01-03 AT AT3569A patent/AT291638B/de not_active IP Right Cessation
Also Published As
| Publication number | Publication date |
|---|---|
| DE1900099B2 (de) | 1973-10-18 |
| SE335641B (US07534539-20090519-C00280.png) | 1971-06-01 |
| NL6817968A (US07534539-20090519-C00280.png) | 1969-07-08 |
| US3518700A (en) | 1970-06-30 |
| DE1900099C3 (de) | 1974-05-16 |
| AT291638B (de) | 1971-07-26 |
| DE1900099A1 (de) | 1969-10-02 |
| GB1194450A (en) | 1970-06-10 |
| FR1598014A (US07534539-20090519-C00280.png) | 1970-06-29 |
| BE726072A (US07534539-20090519-C00280.png) | 1969-05-29 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PL | Patent ceased |