FR2217757A1 - - Google Patents
Info
- Publication number
- FR2217757A1 FR2217757A1 FR7404141A FR7404141A FR2217757A1 FR 2217757 A1 FR2217757 A1 FR 2217757A1 FR 7404141 A FR7404141 A FR 7404141A FR 7404141 A FR7404141 A FR 7404141A FR 2217757 A1 FR2217757 A1 FR 2217757A1
- Authority
- FR
- France
- 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.)
- Granted
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
- G11B20/10009—Improvement or modification of read or write signals
- G11B20/10046—Improvement or modification of read or write signals filtering or equalising, e.g. setting the tap weights of an FIR filter
- G11B20/10212—Improvement or modification of read or write signals filtering or equalising, e.g. setting the tap weights of an FIR filter compensation for data shift, e.g. pulse-crowding effects
-
- 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)
- Digital Magnetic Recording (AREA)
- Signal Processing For Digital Recording And Reproducing (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19732306310 DE2306310C3 (de) | 1973-02-08 | Digitale Entzerrerschartung zur Entzerrung der von einem Magnetschichtspeicher gelieferten Leseimpulsfolgen |
Publications (2)
Publication Number | Publication Date |
---|---|
FR2217757A1 true FR2217757A1 (fr) | 1974-09-06 |
FR2217757B3 FR2217757B3 (fr) | 1976-11-26 |
Family
ID=5871375
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
FR7404141A Expired FR2217757B3 (fr) | 1973-02-08 | 1974-02-07 |
Country Status (5)
Country | Link |
---|---|
BE (1) | BE810779A (fr) |
FR (1) | FR2217757B3 (fr) |
GB (1) | GB1449383A (fr) |
IT (1) | IT1007175B (fr) |
NL (1) | NL7401456A (fr) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0141028A2 (fr) * | 1983-10-25 | 1985-05-15 | BULL HN INFORMATION SYSTEMS ITALIA S.p.A. | Dispositif numérique pour un système de lecture de données d'un support magnétique |
EP0195368A2 (fr) * | 1985-03-21 | 1986-09-24 | BULL HN INFORMATION SYSTEMS ITALIA S.p.A. | Appareil numérique pour un système de récupération de données |
EP0222132A2 (fr) * | 1985-10-10 | 1987-05-20 | BULL HN INFORMATION SYSTEMS ITALIA S.p.A. | Circuit de séparation de données digitales |
-
1974
- 1974-01-31 IT IT2001474A patent/IT1007175B/it active
- 1974-02-01 NL NL7401456A patent/NL7401456A/xx unknown
- 1974-02-04 GB GB505174A patent/GB1449383A/en not_active Expired
- 1974-02-07 FR FR7404141A patent/FR2217757B3/fr not_active Expired
- 1974-02-08 BE BE140696A patent/BE810779A/fr unknown
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0141028A2 (fr) * | 1983-10-25 | 1985-05-15 | BULL HN INFORMATION SYSTEMS ITALIA S.p.A. | Dispositif numérique pour un système de lecture de données d'un support magnétique |
EP0141028A3 (en) * | 1983-10-25 | 1987-12-09 | Honeywell Bull Spa | Digital apparatus for magnetic media data recovery system |
EP0195368A2 (fr) * | 1985-03-21 | 1986-09-24 | BULL HN INFORMATION SYSTEMS ITALIA S.p.A. | Appareil numérique pour un système de récupération de données |
EP0195368A3 (en) * | 1985-03-21 | 1987-12-23 | Honeywell Bull Italia S.P.A. | Digital apparatus for data recovery system |
EP0222132A2 (fr) * | 1985-10-10 | 1987-05-20 | BULL HN INFORMATION SYSTEMS ITALIA S.p.A. | Circuit de séparation de données digitales |
EP0222132A3 (en) * | 1985-10-10 | 1988-10-26 | Honeywell Bull Italia S.P.A. | Digital data separator |
Also Published As
Publication number | Publication date |
---|---|
FR2217757B3 (fr) | 1976-11-26 |
DE2306310A1 (de) | 1974-08-29 |
IT1007175B (it) | 1976-10-30 |
NL7401456A (fr) | 1974-08-12 |
DE2306310B2 (de) | 1975-06-26 |
BE810779A (fr) | 1974-08-08 |
GB1449383A (en) | 1976-09-15 |
Similar Documents
Legal Events
Date | Code | Title | Description |
---|---|---|---|
ST | Notification of lapse |