FR2280139A1 - Dispositif de compression de donnees - Google Patents
Dispositif de compression de donneesInfo
- Publication number
- FR2280139A1 FR2280139A1 FR7513252A FR7513252A FR2280139A1 FR 2280139 A1 FR2280139 A1 FR 2280139A1 FR 7513252 A FR7513252 A FR 7513252A FR 7513252 A FR7513252 A FR 7513252A FR 2280139 A1 FR2280139 A1 FR 2280139A1
- Authority
- FR
- France
- Prior art keywords
- data compression
- compression device
- data
- compression
- 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.)
- Withdrawn
Links
Classifications
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03M—CODING; DECODING; CODE CONVERSION IN GENERAL
- H03M7/00—Conversion of a code where information is represented by a given sequence or number of digits to a code where the same, similar or subset of information is represented by a different sequence or number of digits
- H03M7/30—Compression; Expansion; Suppression of unnecessary data, e.g. redundancy reduction
- H03M7/46—Conversion to or from run-length codes, i.e. by representing the number of consecutive digits, or groups of digits, of the same kind by a code word and a digit indicative of that kind
- H03M7/48—Conversion to or from run-length codes, i.e. by representing the number of consecutive digits, or groups of digits, of the same kind by a code word and a digit indicative of that kind alternating with other codes during the code conversion process, e.g. run-length coding being performed only as long as sufficientlylong runs of digits of the same kind are present
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03M—CODING; DECODING; CODE CONVERSION IN GENERAL
- H03M5/00—Conversion of the form of the representation of individual digits
- H03M5/02—Conversion to or from representation by pulses
- H03M5/04—Conversion to or from representation by pulses the pulses having two levels
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03M—CODING; DECODING; CODE CONVERSION IN GENERAL
- H03M5/00—Conversion of the form of the representation of individual digits
- H03M5/02—Conversion to or from representation by pulses
- H03M5/04—Conversion to or from representation by pulses the pulses having two levels
- H03M5/14—Code representation, e.g. transition, for a given bit cell depending on the information in one or more adjacent bit cells, e.g. delay modulation code, double density code
- H03M5/145—Conversion to or from block codes or representations thereof
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03M—CODING; DECODING; CODE CONVERSION IN GENERAL
- H03M7/00—Conversion of a code where information is represented by a given sequence or number of digits to a code where the same, similar or subset of information is represented by a different sequence or number of digits
- H03M7/30—Compression; Expansion; Suppression of unnecessary data, e.g. redundancy reduction
- H03M7/40—Conversion to or from variable length codes, e.g. Shannon-Fano code, Huffman code, Morse code
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03M—CODING; DECODING; CODE CONVERSION IN GENERAL
- H03M7/00—Conversion of a code where information is represented by a given sequence or number of digits to a code where the same, similar or subset of information is represented by a different sequence or number of digits
- H03M7/30—Compression; Expansion; Suppression of unnecessary data, e.g. redundancy reduction
- H03M7/46—Conversion to or from run-length codes, i.e. by representing the number of consecutive digits, or groups of digits, of the same kind by a code word and a digit indicative of that kind
Landscapes
- Engineering & Computer Science (AREA)
- Theoretical Computer Science (AREA)
- Dc Digital Transmission (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US465854A US3873977A (en) | 1974-05-01 | 1974-05-01 | Data compression method and apparatus |
Publications (1)
Publication Number | Publication Date |
---|---|
FR2280139A1 true FR2280139A1 (fr) | 1976-02-20 |
Family
ID=23849441
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
FR7513252A Withdrawn FR2280139A1 (fr) | 1974-05-01 | 1975-04-28 | Dispositif de compression de donnees |
Country Status (4)
Country | Link |
---|---|
US (1) | US3873977A (fr) |
JP (1) | JPS50151012A (fr) |
DE (1) | DE2519353A1 (fr) |
FR (1) | FR2280139A1 (fr) |
Families Citing this family (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3949377A (en) * | 1974-09-03 | 1976-04-06 | Ultronic Systems Corporation | Data storage and processing apparatus including processing of spacer characters |
JPH07101482B2 (ja) * | 1982-01-23 | 1995-11-01 | ソニー株式会社 | ディジタル信号記録装置 |
DE3247120C2 (de) * | 1982-12-20 | 1985-09-12 | Siemens Ag, 1000 Berlin Und 8000 Muenchen | Verfahren und Schaltungsanordnung zur Umsetzung eines zwischen zwei Pegeln wechselnden Binärsignals in ein Pulscodesignal, das Datenimpulse und Erneuerungsimpulse aufweist |
US4626829A (en) * | 1985-08-19 | 1986-12-02 | Intelligent Storage Inc. | Data compression using run length encoding and statistical encoding |
US5532694A (en) * | 1989-01-13 | 1996-07-02 | Stac Electronics, Inc. | Data compression apparatus and method using matching string searching and Huffman encoding |
US5146221A (en) * | 1989-01-13 | 1992-09-08 | Stac, Inc. | Data compression apparatus and method |
US5488653A (en) * | 1991-09-04 | 1996-01-30 | Comsat Corporation | Facsimile interface unit (FIU) enhanced capabilities negotiation |
US5687176A (en) * | 1995-06-09 | 1997-11-11 | Hubbell Incorporated | Zero byte substitution method and apparatus for telecommunications equipment |
US20080027894A1 (en) * | 2006-07-25 | 2008-01-31 | Hitachi Global Storage Technologies Netherlands B.V. | File system alteration of media files |
Family Cites Families (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3691553A (en) * | 1970-12-01 | 1972-09-12 | Gen Motors Corp | Method and apparatus for decoding digital information |
-
1974
- 1974-05-01 US US465854A patent/US3873977A/en not_active Expired - Lifetime
-
1975
- 1975-04-28 FR FR7513252A patent/FR2280139A1/fr not_active Withdrawn
- 1975-04-30 DE DE19752519353 patent/DE2519353A1/de active Pending
- 1975-05-01 JP JP50052126A patent/JPS50151012A/ja active Pending
Also Published As
Publication number | Publication date |
---|---|
JPS50151012A (fr) | 1975-12-04 |
US3873977A (en) | 1975-03-25 |
DE2519353A1 (de) | 1975-11-13 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
BE821077A (fr) | Dispositif electro-generateur | |
FR2300372A1 (fr) | Dispositif assura | |
BE828281A (fr) | Dispositif orthopedique | |
FR2281836A1 (fr) | Dispositif marqueur | |
BE834056A (fr) | Dispositif antireflux | |
BE831637A (fr) | Dispositif de forage | |
FR2295490A1 (fr) | Processeur de donnees | |
FR2278054A1 (fr) | Dispositif incendiaire | |
FR2284419A1 (fr) | Dispositif de percage | |
SE7513579L (sv) | Databehandlingsanordning | |
FR2281779A1 (fr) | Dispositif separateur | |
BE833658A (fr) | Dispositif respiratoire | |
FR2292142A1 (fr) | Dispositif de couplage | |
FR2280139A1 (fr) | Dispositif de compression de donnees | |
FR2294009A1 (fr) | Dispositif de percage | |
FR2276571A1 (fr) | Dispositif dynamometrique electrodynamique | |
FR2290732A1 (fr) | Dispositif de stockage de donnees | |
BE785423A (fr) | Dispositif de groupage de donnees | |
FR2282721A1 (fr) | Dispositif semi-conducteur | |
FR2319940A1 (fr) | Dispositif de restitution de donnees | |
BE820037A (fr) | Dispositif d'introduction de donnees | |
FR2279155A1 (fr) | Dispositif autonome d'acquisition de donnees | |
FR2289835A1 (fr) | Dispositif de raccordement | |
BE769442A (fr) | Dispositif de decodage de donnees digitales | |
FR2282680A1 (fr) | Appareil de lecture de donnees |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
ST | Notification of lapse |