FR2408945A1 - Compression et expansion (quantification) de signaux numeriques de television a codage differentiel - Google Patents
Compression et expansion (quantification) de signaux numeriques de television a codage differentielInfo
- Publication number
- FR2408945A1 FR2408945A1 FR7726773A FR7726773A FR2408945A1 FR 2408945 A1 FR2408945 A1 FR 2408945A1 FR 7726773 A FR7726773 A FR 7726773A FR 7726773 A FR7726773 A FR 7726773A FR 2408945 A1 FR2408945 A1 FR 2408945A1
- Authority
- FR
- France
- Prior art keywords
- expansion
- compression
- loss
- digital signals
- digital
- 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
- H04B—TRANSMISSION
- H04B14/00—Transmission systems not characterised by the medium used for transmission
- H04B14/02—Transmission systems not characterised by the medium used for transmission characterised by the use of pulse modulation
- H04B14/04—Transmission systems not characterised by the medium used for transmission characterised by the use of pulse modulation using pulse code modulation
- H04B14/046—Systems or methods for reducing noise or bandwidth
- H04B14/048—Non linear compression or expansion
-
- 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
- H04N19/10—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using adaptive coding
- H04N19/102—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using adaptive coding characterised by the element, parameter or selection affected or controlled by the adaptive coding
- H04N19/124—Quantisation
-
- 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
- H04N19/50—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using predictive coding
Landscapes
- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Multimedia (AREA)
- Physics & Mathematics (AREA)
- Nonlinear Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Compression, Expansion, Code Conversion, And Decoders (AREA)
- Compression Or Coding Systems Of Tv Signals (AREA)
Abstract
LE CODAGE DES SIGNAUX DE TELEVISION A TRAITER OU TRANSMETTRE SOUS FORME NUMERIQUE EST EFFECTUE EN UTILISANT LA MODULATION D'IMPULSIONS CODEES DIFFERENTIELLES (MICD). ON PREVOIT UNE CARACTERISTIQUE DE QUANTIFICATION QUI PERMET DE REDUIRE LE DEBIT NUMERIQUE A TRANSMETTRE OU TRAITER. LA CARACTERISTIQUE EST, AU MOINS PARTIELLEMENT, NON SYMETRIQUE PAR RAPPORT A ZERO, EN CE QUI CONCERNE LE NOMBRE ET LES VALEURS DES SEUILS ET DES SIGNAUX DE RECONSTRUCTION DES DIFFERENCES. DES EXEMPLES NUMERIQUES SONT DONNES. AVEC CETTE CARACTERISTIQUE, IL EST POSSIBLE D'ATTEINDRE UN DEBIT DE 34MEBS QUI SERAIT LE SYSTEME NORMALISE.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR7726773A FR2408945A1 (fr) | 1977-08-26 | 1977-08-26 | Compression et expansion (quantification) de signaux numeriques de television a codage differentiel |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR7726773A FR2408945A1 (fr) | 1977-08-26 | 1977-08-26 | Compression et expansion (quantification) de signaux numeriques de television a codage differentiel |
Publications (2)
Publication Number | Publication Date |
---|---|
FR2408945A1 true FR2408945A1 (fr) | 1979-06-08 |
FR2408945B1 FR2408945B1 (fr) | 1980-04-25 |
Family
ID=9195013
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
FR7726773A Granted FR2408945A1 (fr) | 1977-08-26 | 1977-08-26 | Compression et expansion (quantification) de signaux numeriques de television a codage differentiel |
Country Status (1)
Country | Link |
---|---|
FR (1) | FR2408945A1 (fr) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0012632A1 (fr) * | 1978-12-08 | 1980-06-25 | Etablissement Public de Diffusion dit "Télédiffusion de France" | Compression et expansion (quantification) de signaux numériques de télévision à codage différentiel |
US4661862A (en) * | 1984-04-27 | 1987-04-28 | Rca Corporation | Differential PCM video transmission system employing horizontally offset five pixel groups and delta signals having plural non-linear encoding functions |
EP0288782A2 (fr) * | 1987-04-27 | 1988-11-02 | Siemens Aktiengesellschaft | Dispositif pour le codage DPCM de signaux de télévision avec traitement rapide des signaux |
WO1994026068A1 (fr) * | 1993-04-29 | 1994-11-10 | Alcatel N.V. | Procede de codage et de decodage differentiels et circuits connexes |
-
1977
- 1977-08-26 FR FR7726773A patent/FR2408945A1/fr active Granted
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0012632A1 (fr) * | 1978-12-08 | 1980-06-25 | Etablissement Public de Diffusion dit "Télédiffusion de France" | Compression et expansion (quantification) de signaux numériques de télévision à codage différentiel |
US4661862A (en) * | 1984-04-27 | 1987-04-28 | Rca Corporation | Differential PCM video transmission system employing horizontally offset five pixel groups and delta signals having plural non-linear encoding functions |
EP0288782A2 (fr) * | 1987-04-27 | 1988-11-02 | Siemens Aktiengesellschaft | Dispositif pour le codage DPCM de signaux de télévision avec traitement rapide des signaux |
EP0288782A3 (en) * | 1987-04-27 | 1990-06-13 | Siemens Aktiengesellschaft | Arrangement for the dpcm coding of television signals using fast signal processing |
WO1994026068A1 (fr) * | 1993-04-29 | 1994-11-10 | Alcatel N.V. | Procede de codage et de decodage differentiels et circuits connexes |
Also Published As
Publication number | Publication date |
---|---|
FR2408945B1 (fr) | 1980-04-25 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
TP | Transmission of property | ||
ST | Notification of lapse |