GB1312753A - Self-adapting synchronization system for reading digital information from a moving support - Google Patents
Self-adapting synchronization system for reading digital information from a moving supportInfo
- Publication number
- GB1312753A GB1312753A GB1168771A GB1168771A GB1312753A GB 1312753 A GB1312753 A GB 1312753A GB 1168771 A GB1168771 A GB 1168771A GB 1168771 A GB1168771 A GB 1168771A GB 1312753 A GB1312753 A GB 1312753A
- Authority
- GB
- United Kingdom
- Prior art keywords
- counter
- pulses
- pulse
- data
- clock
- 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
Links
- 239000003990 capacitor Substances 0.000 abstract 2
- 230000002441 reversible effect Effects 0.000 abstract 2
- 230000000737 periodic effect Effects 0.000 abstract 1
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
- G11B20/16—Digital recording or reproducing using non self-clocking codes, i.e. the clock signals are either recorded in a separate clocking track or in a combination of several information tracks
-
- 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)
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| IT6842970 | 1970-04-27 | ||
| IT6826471A IT994518B (it) | 1971-04-16 | 1971-04-16 | Perfezionamenti ai sistemi di auto adattamento della sinoronizzazione per la lettura di supporti di re gistrazione mobili |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1312753A true GB1312753A (en) | 1973-04-04 |
Family
ID=26329891
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB1168771A Expired GB1312753A (en) | 1970-04-27 | 1971-04-27 | Self-adapting synchronization system for reading digital information from a moving support |
Country Status (2)
| Country | Link |
|---|---|
| FR (1) | FR2090793A5 (enExample) |
| GB (1) | GB1312753A (enExample) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2443170A1 (fr) * | 1974-11-08 | 1980-06-27 | Ibm | Procede de codage de donnees en code f2f, et procede et appareil pour l'interpretation de ces donnees |
| FR2446561A1 (fr) * | 1974-12-31 | 1980-08-08 | Ibm | Procede et appareil pour l'interpretation des donnees codees en code f2f |
-
1971
- 1971-04-27 FR FR7114979A patent/FR2090793A5/fr not_active Expired
- 1971-04-27 GB GB1168771A patent/GB1312753A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| FR2090793A5 (enExample) | 1972-01-14 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PS | Patent sealed | ||
| PCNP | Patent ceased through non-payment of renewal fee |