CA973968A - Data recording system and bi-phase mark encoder therefor - Google Patents
Data recording system and bi-phase mark encoder thereforInfo
- Publication number
- CA973968A CA973968A CA141,313A CA141313A CA973968A CA 973968 A CA973968 A CA 973968A CA 141313 A CA141313 A CA 141313A CA 973968 A CA973968 A CA 973968A
- Authority
- CA
- Canada
- Prior art keywords
- data recording
- recording system
- phase mark
- mark encoder
- therefor
- 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
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)
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US14035671A | 1971-05-05 | 1971-05-05 | |
| US16819971A | 1971-08-02 | 1971-08-02 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA973968A true CA973968A (en) | 1975-09-02 |
Family
ID=26838112
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA141,313A Expired CA973968A (en) | 1971-05-05 | 1972-05-04 | Data recording system and bi-phase mark encoder therefor |
Country Status (4)
| Country | Link |
|---|---|
| CA (1) | CA973968A (OSRAM) |
| DE (1) | DE2221797A1 (OSRAM) |
| FR (1) | FR2135353A1 (OSRAM) |
| GB (1) | GB1347199A (OSRAM) |
-
1972
- 1972-05-04 DE DE19722221797 patent/DE2221797A1/de active Pending
- 1972-05-04 CA CA141,313A patent/CA973968A/en not_active Expired
- 1972-05-05 FR FR7216258A patent/FR2135353A1/fr not_active Withdrawn
- 1972-05-05 GB GB2103072A patent/GB1347199A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| GB1347199A (en) | 1974-02-27 |
| DE2221797A1 (de) | 1972-11-16 |
| FR2135353A1 (OSRAM) | 1972-12-15 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CA948166A (en) | Re-price marking method and record member | |
| CA969278A (en) | Coded record interpreting system | |
| MY7600164A (en) | Information record playback systems | |
| CA979992A (en) | Environmental data system | |
| CA1011877A (en) | Information playback system stylus | |
| CA985780A (en) | Information playback system | |
| CA1004766A (en) | Record reading system | |
| CA989065A (en) | Magnetic ink recording system | |
| CA936848A (en) | Information recorder | |
| AU470184B2 (en) | Information record card | |
| CA958809A (en) | Coded data sensing system | |
| CA973968A (en) | Data recording system and bi-phase mark encoder therefor | |
| CA922290A (en) | Information recorder | |
| CA1006976A (en) | Stepping data recorder | |
| CA952238A (en) | Data translator and recording system | |
| SU600579A1 (ru) | Устройство дл регистрации информации | |
| CA992200A (en) | Data recorders | |
| CA915808A (en) | Information recording | |
| CA885594A (en) | Data record | |
| CA1016651A (en) | Information playback system stylus | |
| AU480681B2 (en) | Information playback system stylus | |
| CA932380A (en) | Information transmission and recording system | |
| CA895459A (en) | Data recording system | |
| CA894930A (en) | Clipboard data recorder | |
| CA880580A (en) | Information recording circuit |