IT1121283B - PROCEDURE AND DEVICE FOR THE REGISTRATION OF INFORMATION ON A SUPPORT, IN PARTICULAR MAGNETIC, INDEPENDENTLY FROM THE SPEED OF THE SUPPORT - Google Patents
PROCEDURE AND DEVICE FOR THE REGISTRATION OF INFORMATION ON A SUPPORT, IN PARTICULAR MAGNETIC, INDEPENDENTLY FROM THE SPEED OF THE SUPPORTInfo
- Publication number
- IT1121283B IT1121283B IT23519/79A IT2351979A IT1121283B IT 1121283 B IT1121283 B IT 1121283B IT 23519/79 A IT23519/79 A IT 23519/79A IT 2351979 A IT2351979 A IT 2351979A IT 1121283 B IT1121283 B IT 1121283B
- Authority
- IT
- Italy
- Prior art keywords
- support
- registration
- independently
- procedure
- speed
- 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
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
- G06K1/00—Methods or arrangements for marking the record carrier in digital fashion
- G06K1/12—Methods or arrangements for marking the record carrier in digital fashion otherwise than by punching
- G06K1/125—Methods or arrangements for marking the record carrier in digital fashion otherwise than by punching by magnetic means
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
- G06K7/00—Methods or arrangements for sensing record carriers, e.g. for reading patterns
- G06K7/01—Details
- G06K7/016—Synchronisation of sensing process
- G06K7/0166—Synchronisation of sensing process by means of clock-signals derived from the code marks, e.g. self-clocking code
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Theoretical Computer Science (AREA)
- Signal Processing (AREA)
- Artificial Intelligence (AREA)
- Computer Vision & Pattern Recognition (AREA)
- Digital Magnetic Recording (AREA)
- Signal Processing For Digital Recording And Reproducing (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR7817640A FR2428874A1 (en) | 1978-06-13 | 1978-06-13 | METHOD AND DEVICE FOR RECORDING INFORMATION ON A MEDIUM, PARTICULARLY MAGNETIC, INDEPENDENT OF THE SPEED OF THE MEDIUM |
Publications (2)
Publication Number | Publication Date |
---|---|
IT7923519A0 IT7923519A0 (en) | 1979-06-13 |
IT1121283B true IT1121283B (en) | 1986-04-02 |
Family
ID=9209434
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
IT23519/79A IT1121283B (en) | 1978-06-13 | 1979-06-13 | PROCEDURE AND DEVICE FOR THE REGISTRATION OF INFORMATION ON A SUPPORT, IN PARTICULAR MAGNETIC, INDEPENDENTLY FROM THE SPEED OF THE SUPPORT |
Country Status (5)
Country | Link |
---|---|
JP (1) | JPS54163016A (en) |
DE (1) | DE2923973A1 (en) |
FR (1) | FR2428874A1 (en) |
GB (1) | GB2026287B (en) |
IT (1) | IT1121283B (en) |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4394621A (en) * | 1980-12-08 | 1983-07-19 | International Business Machines Corporation | Electronic velocity measurement especially for self-clocking write head |
DE3241400A1 (en) * | 1982-11-09 | 1984-05-10 | Nixdorf Computer Ag, 4790 Paderborn | METHOD AND DEVICE FOR CONTINUOUSLY RECORDING INFORMATION SIGNALS OF A PRE-DETERMINED LENGTH ON A MAGNETIC MEMORY TRACK |
US5780828A (en) * | 1996-02-15 | 1998-07-14 | Dh Technology, Inc. | Interactive video systems |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2076309A5 (en) * | 1970-01-09 | 1971-10-15 | Compteurs Comp D | |
FR2076658A5 (en) * | 1970-01-22 | 1971-10-15 | Automatisme Cie Gle |
-
1978
- 1978-06-13 FR FR7817640A patent/FR2428874A1/en active Granted
-
1979
- 1979-05-08 GB GB7915854A patent/GB2026287B/en not_active Expired
- 1979-05-22 JP JP6229779A patent/JPS54163016A/en active Pending
- 1979-06-13 DE DE19792923973 patent/DE2923973A1/en not_active Withdrawn
- 1979-06-13 IT IT23519/79A patent/IT1121283B/en active
Also Published As
Publication number | Publication date |
---|---|
FR2428874B1 (en) | 1980-10-10 |
JPS54163016A (en) | 1979-12-25 |
GB2026287A (en) | 1980-01-30 |
IT7923519A0 (en) | 1979-06-13 |
FR2428874A1 (en) | 1980-01-11 |
GB2026287B (en) | 1982-10-13 |
DE2923973A1 (en) | 1980-01-03 |
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