SE334645B - - Google Patents
Info
- Publication number
- SE334645B SE334645B SE09802/68A SE980268A SE334645B SE 334645 B SE334645 B SE 334645B SE 09802/68 A SE09802/68 A SE 09802/68A SE 980268 A SE980268 A SE 980268A SE 334645 B SE334645 B SE 334645B
- Authority
- SE
- Sweden
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)
- Signal Processing For Digital Recording And Reproducing (AREA)
- Synchronisation In Digital Transmission Systems (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US65378467A | 1967-07-17 | 1967-07-17 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| SE334645B true SE334645B (xx) | 1971-05-03 |
Family
ID=24622296
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| SE09802/68A SE334645B (xx) | 1967-07-17 | 1968-07-17 |
Country Status (6)
| Country | Link |
|---|---|
| US (1) | US3500385A (xx) |
| CH (1) | CH500636A (xx) |
| FR (1) | FR1576635A (xx) |
| GB (1) | GB1165658A (xx) |
| NL (1) | NL6808643A (xx) |
| SE (1) | SE334645B (xx) |
Families Citing this family (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3626395A (en) * | 1970-05-06 | 1971-12-07 | Burroughs Corp | Dual clocking recording and reproducing system for magnetic data |
| US3678503A (en) * | 1970-07-06 | 1972-07-18 | Honeywell Inc | Two phase encoder system for three frequency modulation |
| US3697977A (en) * | 1970-07-06 | 1972-10-10 | Honeywell Inc | Two phase encoder system for three frequency modulation |
| US3671960A (en) * | 1970-07-06 | 1972-06-20 | Honeywell Inc | Four phase encoder system for three frequency modulation |
| USRE28330E (en) * | 1970-08-17 | 1975-02-04 | Self-clocking five bit record-playback ststem | |
| US3641525A (en) * | 1970-08-17 | 1972-02-08 | Ncr Co | Self-clocking five bit record-playback system |
| US3725885A (en) * | 1970-09-28 | 1973-04-03 | Ibm | Method and apparatus for amplitude sensing and data gating in a magnetic-storage device with digital interface |
| US3656149A (en) * | 1970-11-23 | 1972-04-11 | Honeywell Inf Systems | Three frequency data separator |
| US3761906A (en) * | 1971-01-08 | 1973-09-25 | Cogar Corp | Tape system |
| US3794987A (en) * | 1972-11-01 | 1974-02-26 | Burroughs Corp | Mfm readout with assymetrical data window |
| FR2234708B1 (xx) * | 1973-06-22 | 1976-09-17 | Thomson Csf |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3108261A (en) * | 1960-04-11 | 1963-10-22 | Ampex | Recording and/or reproducing system |
| US3217183A (en) * | 1963-01-04 | 1965-11-09 | Ibm | Binary data detection system |
| US3405391A (en) * | 1964-12-21 | 1968-10-08 | Ibm | Double frequency detection system |
| US3374475A (en) * | 1965-05-24 | 1968-03-19 | Potter Instrument Co Inc | High density recording system |
| US3414894A (en) * | 1965-06-29 | 1968-12-03 | Rca Corp | Magnetic recording and reproducing of digital information |
-
1967
- 1967-07-17 US US653784A patent/US3500385A/en not_active Expired - Lifetime
-
1968
- 1968-06-19 FR FR06009244A patent/FR1576635A/fr not_active Expired
- 1968-06-20 NL NL6808643A patent/NL6808643A/xx unknown
- 1968-06-24 GB GB30073/68A patent/GB1165658A/en not_active Expired
- 1968-07-16 CH CH1062368A patent/CH500636A/de not_active IP Right Cessation
- 1968-07-17 SE SE09802/68A patent/SE334645B/xx unknown
Also Published As
| Publication number | Publication date |
|---|---|
| FR1576635A (xx) | 1969-08-01 |
| DE1774505B2 (de) | 1975-11-27 |
| NL6808643A (xx) | 1969-01-21 |
| DE1774505A1 (de) | 1972-03-23 |
| US3500385A (en) | 1970-03-10 |
| GB1165658A (en) | 1969-10-01 |
| CH500636A (de) | 1970-12-15 |