JPS4912645B1 - - Google Patents
Info
- Publication number
- JPS4912645B1 JPS4912645B1 JP45020966A JP2096670A JPS4912645B1 JP S4912645 B1 JPS4912645 B1 JP S4912645B1 JP 45020966 A JP45020966 A JP 45020966A JP 2096670 A JP2096670 A JP 2096670A JP S4912645 B1 JPS4912645 B1 JP S4912645B1
- Authority
- JP
- Japan
- 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.)
- Pending
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
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L25/00—Baseband systems
- H04L25/02—Details ; arrangements for supplying electrical power along data transmission lines
- H04L25/06—Dc level restoring means; Bias distortion correction ; Decision circuits providing symbol by symbol detection
- H04L25/061—Dc level restoring means; Bias distortion correction ; Decision circuits providing symbol by symbol detection providing hard decisions only; arrangements for tracking or suppressing unwanted low frequency components, e.g. removal of dc offset
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L25/00—Baseband systems
- H04L25/38—Synchronous or start-stop systems, e.g. for Baudot code
- H04L25/40—Transmitting circuits; Receiving circuits
- H04L25/49—Transmitting circuits; Receiving circuits using code conversion at the transmitter; using predistortion; using insertion of idle bits for obtaining a desired frequency spectrum; using three or more amplitude levels ; Baseband coding techniques specific to data transmission systems
- H04L25/4904—Transmitting circuits; Receiving circuits using code conversion at the transmitter; using predistortion; using insertion of idle bits for obtaining a desired frequency spectrum; using three or more amplitude levels ; Baseband coding techniques specific to data transmission systems using self-synchronising codes, e.g. split-phase codes
Landscapes
- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Computer Networks & Wireless Communication (AREA)
- Physics & Mathematics (AREA)
- Spectroscopy & Molecular Physics (AREA)
- Power Engineering (AREA)
- Digital Magnetic Recording (AREA)
- Signal Processing For Digital Recording And Reproducing (AREA)
- Dc Digital Transmission (AREA)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US81782969A | 1969-04-21 | 1969-04-21 | |
US81776169A | 1969-04-21 | 1969-04-21 |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS4912645B1 true JPS4912645B1 (en) | 1974-03-26 |
Family
ID=27124201
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP45020966A Pending JPS4912645B1 (en) | 1969-04-21 | 1970-03-13 |
Country Status (3)
Country | Link |
---|---|
JP (1) | JPS4912645B1 (en) |
DE (1) | DE2017703C3 (en) |
FR (1) | FR2039312A1 (en) |
Families Citing this family (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB1489177A (en) * | 1973-10-16 | 1977-10-19 | Gen Electric Co Ltd | Digital data signalling systems and apparatus therefor |
US3898689A (en) * | 1974-08-02 | 1975-08-05 | Bell Telephone Labor Inc | Code converter |
US4234898A (en) * | 1978-03-15 | 1980-11-18 | Nippon Hoso Kyokai | Digital magnetic recording and reproducing apparatus |
FR2424601A1 (en) * | 1978-04-25 | 1979-11-23 | Cii Honeywell Bull | PROCESS FOR SERVICING THE READING SIGNAL OF AN INFORMATION MEDIA AND DEVICE FOR IMPLEMENTING IT |
JPS5834002B2 (en) * | 1979-10-17 | 1983-07-23 | 日立電子株式会社 | Magnetic recording and reproducing method for digital signals |
US4635140A (en) * | 1982-05-08 | 1987-01-06 | Victor Company Of Japan, Limited | Digital recording/playback system with limited frequency range |
AT404846B (en) * | 1997-06-16 | 1999-03-25 | Chemiefaser Lenzing Ag | COMPOSITION CONTAINING FINE SOLID PARTICLES |
-
1970
- 1970-03-13 JP JP45020966A patent/JPS4912645B1/ja active Pending
- 1970-04-03 FR FR7012251A patent/FR2039312A1/fr not_active Withdrawn
- 1970-04-14 DE DE19702017703 patent/DE2017703C3/en not_active Expired
Also Published As
Publication number | Publication date |
---|---|
DE2017703A1 (en) | 1970-11-05 |
DE2017703C3 (en) | 1978-12-07 |
DE2017703B2 (en) | 1978-04-13 |
FR2039312A1 (en) | 1971-01-15 |