FR2442481B1 - - Google Patents
Info
- Publication number
- FR2442481B1 FR2442481B1 FR7928838A FR7928838A FR2442481B1 FR 2442481 B1 FR2442481 B1 FR 2442481B1 FR 7928838 A FR7928838 A FR 7928838A FR 7928838 A FR7928838 A FR 7928838A FR 2442481 B1 FR2442481 B1 FR 2442481B1
- Authority
- FR
- France
- 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
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
- G11B20/1423—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
Landscapes
- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Signal Processing For Digital Recording And Reproducing (AREA)
- Dc Digital Transmission (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US05/963,639 US4219851A (en) | 1978-11-24 | 1978-11-24 | Group coded recording data recovery system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| FR2442481A1 FR2442481A1 (fr) | 1980-06-20 |
| FR2442481B1 true FR2442481B1 (OSRAM) | 1983-06-03 |
Family
ID=25507504
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| FR7928838A Granted FR2442481A1 (fr) | 1978-11-24 | 1979-11-22 | Systeme de retablissement de donnees d'enregistrement codees par groupes |
Country Status (7)
| Country | Link |
|---|---|
| US (1) | US4219851A (OSRAM) |
| JP (2) | JPS5573912A (OSRAM) |
| AU (1) | AU531322B2 (OSRAM) |
| CA (1) | CA1143832A (OSRAM) |
| DE (1) | DE2946995A1 (OSRAM) |
| FR (1) | FR2442481A1 (OSRAM) |
| GB (1) | GB2039194B (OSRAM) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0062541A1 (en) * | 1981-04-07 | 1982-10-13 | Honeywell Information Systems Inc. | Phase-locked oscillators |
| US4891717A (en) * | 1986-09-22 | 1990-01-02 | Magnetic Peripherals Inc. | Methods and apparatus for performing high density isotropic/perpendicular digital magnetic recording |
| JPH01248301A (ja) * | 1988-03-30 | 1989-10-03 | Kyodo Printing Co Ltd | 磁気記録媒体およびそのセキュリティ情報の記録再生方法 |
| JP2589759B2 (ja) * | 1988-05-27 | 1997-03-12 | 松下電器産業株式会社 | データ識別装置 |
| US5790946A (en) | 1993-07-15 | 1998-08-04 | Rotzoll; Robert R. | Wake up device for a communications system |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3792454A (en) * | 1972-01-03 | 1974-02-12 | Honeywell Inf Systems | Magnetic strorage system using alternate codes to reduce write current bias |
| JPS505569U (OSRAM) * | 1973-05-16 | 1975-01-21 | ||
| JPS505569A (OSRAM) * | 1973-05-18 | 1975-01-21 | ||
| US3879752A (en) * | 1974-04-04 | 1975-04-22 | Iomec | Combined sector pulse and data detection system |
| US3930265A (en) * | 1974-06-07 | 1975-12-30 | Vrc California | High density magnetic storage system |
| US4146743A (en) * | 1976-08-09 | 1979-03-27 | Hewlett-Packard Company | Adaptive sampling decoder-encoder apparatus and method |
| US4053738A (en) * | 1976-09-27 | 1977-10-11 | Honeywell Information Systems Inc. | Programmable data envelope detector |
| US4141494A (en) * | 1977-02-25 | 1979-02-27 | Fisher Alan J | Digital code reader |
-
1978
- 1978-11-24 US US05/963,639 patent/US4219851A/en not_active Expired - Lifetime
-
1979
- 1979-11-02 CA CA000339097A patent/CA1143832A/en not_active Expired
- 1979-11-19 AU AU52965/79A patent/AU531322B2/en not_active Ceased
- 1979-11-19 JP JP14991779A patent/JPS5573912A/ja active Pending
- 1979-11-21 DE DE19792946995 patent/DE2946995A1/de not_active Withdrawn
- 1979-11-21 GB GB7940279A patent/GB2039194B/en not_active Expired
- 1979-11-22 FR FR7928838A patent/FR2442481A1/fr active Granted
-
1988
- 1988-06-13 JP JP1988078231U patent/JPS6418465U/ja active Pending
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5573912A (en) | 1980-06-04 |
| GB2039194A (en) | 1980-07-30 |
| CA1143832A (en) | 1983-03-29 |
| AU531322B2 (en) | 1983-08-18 |
| US4219851A (en) | 1980-08-26 |
| AU5296579A (en) | 1980-05-29 |
| DE2946995A1 (de) | 1980-06-04 |
| JPS6418465U (OSRAM) | 1989-01-30 |
| FR2442481A1 (fr) | 1980-06-20 |
| GB2039194B (en) | 1983-01-06 |
Similar Documents
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| ST | Notification of lapse |