FR2312887A1 - Procede de codage differentiel par impulsions codees du type dpcm a intervalles variables et systeme de transmission de donnees utilisant un tel procede - Google Patents
Procede de codage differentiel par impulsions codees du type dpcm a intervalles variables et systeme de transmission de donnees utilisant un tel procedeInfo
- Publication number
- FR2312887A1 FR2312887A1 FR7516404A FR7516404A FR2312887A1 FR 2312887 A1 FR2312887 A1 FR 2312887A1 FR 7516404 A FR7516404 A FR 7516404A FR 7516404 A FR7516404 A FR 7516404A FR 2312887 A1 FR2312887 A1 FR 2312887A1
- Authority
- FR
- France
- Prior art keywords
- compression rate
- high compression
- transmission system
- several times
- data transmission
- 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.)
- Granted
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N19/00—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals
- H04N19/90—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using coding techniques not provided for in groups H04N19/10-H04N19/85, e.g. fractals
- H04N19/93—Run-length coding
-
- 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
- H03M7/4025—Conversion to or from variable length codes, e.g. Shannon-Fano code, Huffman code, Morse code constant length to or from Morse code conversion
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/66—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission for reducing bandwidth of signals; for improving efficiency of transmission
Landscapes
- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Theoretical Computer Science (AREA)
- Multimedia (AREA)
- Computer Networks & Wireless Communication (AREA)
- Compression, Expansion, Code Conversion, And Decoders (AREA)
- Dc Digital Transmission (AREA)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR7516404A FR2312887A1 (fr) | 1975-05-27 | 1975-05-27 | Procede de codage differentiel par impulsions codees du type dpcm a intervalles variables et systeme de transmission de donnees utilisant un tel procede |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR7516404A FR2312887A1 (fr) | 1975-05-27 | 1975-05-27 | Procede de codage differentiel par impulsions codees du type dpcm a intervalles variables et systeme de transmission de donnees utilisant un tel procede |
Publications (2)
Publication Number | Publication Date |
---|---|
FR2312887A1 true FR2312887A1 (fr) | 1976-12-24 |
FR2312887B1 FR2312887B1 (fr) | 1977-12-09 |
Family
ID=9155697
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
FR7516404A Granted FR2312887A1 (fr) | 1975-05-27 | 1975-05-27 | Procede de codage differentiel par impulsions codees du type dpcm a intervalles variables et systeme de transmission de donnees utilisant un tel procede |
Country Status (1)
Country | Link |
---|---|
FR (1) | FR2312887A1 (fr) |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR1547613A (fr) * | 1966-10-03 | 1968-11-29 | Xerox Corp | Procédé de codage par longueurs de trains en cascade et circuit correspondant |
US3863248A (en) * | 1973-01-02 | 1975-01-28 | Univ Sherbrooke | Digital compressor-expander |
-
1975
- 1975-05-27 FR FR7516404A patent/FR2312887A1/fr active Granted
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR1547613A (fr) * | 1966-10-03 | 1968-11-29 | Xerox Corp | Procédé de codage par longueurs de trains en cascade et circuit correspondant |
US3863248A (en) * | 1973-01-02 | 1975-01-28 | Univ Sherbrooke | Digital compressor-expander |
Non-Patent Citations (2)
Title |
---|
*REVUE "INTERNATIONALE ELEKTRONISCHE RUNDSCHAU", VOLUME 27, NO. 1, JANVIER 1973, PAGES 12 A 18. ARTICLE: "EIN ADAPTIVER INTRAFRAME-CODIERER FUR FERNSEHSIGNALE", PAR WENDLAND ET MAY. * |
REVUE "ABSTRACTS OF I.E.C.E. TRANSACTIONS", VOLUME 58, NO. 2, FEVRIER 1975, PAGES 3-4. ARTICLE: "A VARIABLE SAMPLING RATE CODING TECHNIQUE", PAR TAKASHI KAWADE ET AL. * |
Also Published As
Publication number | Publication date |
---|---|
FR2312887B1 (fr) | 1977-12-09 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
ST | Notification of lapse |