WO1995027375A1 - Procede et appareil de compression d'images a l'aide d'un codeur en sous-bandes vectorielles - Google Patents

Procede et appareil de compression d'images a l'aide d'un codeur en sous-bandes vectorielles Download PDF

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Publication number
WO1995027375A1
WO1995027375A1 PCT/US1995/004144 US9504144W WO9527375A1 WO 1995027375 A1 WO1995027375 A1 WO 1995027375A1 US 9504144 W US9504144 W US 9504144W WO 9527375 A1 WO9527375 A1 WO 9527375A1
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WO
WIPO (PCT)
Prior art keywords
vector
image
coding
subband
vsc
Prior art date
Application number
PCT/US1995/004144
Other languages
English (en)
Inventor
Weiping Li
John P. Wus, Iii
Ya-Qin Zhang
Original Assignee
Gte Laboratories Incorporated
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Gte Laboratories Incorporated filed Critical Gte Laboratories Incorporated
Publication of WO1995027375A1 publication Critical patent/WO1995027375A1/fr

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Classifications

    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
    • G06T9/00—Image coding
    • G06T9/008—Vector 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
    • H04N19/60—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using transform coding
    • H04N19/63—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using transform coding using sub-band based transform, e.g. wavelets
    • 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
    • H04N19/94—Vector quantisation

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  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Theoretical Computer Science (AREA)
  • Compression Or Coding Systems Of Tv Signals (AREA)
  • Compression, Expansion, Code Conversion, And Decoders (AREA)

Abstract

Technique de compression d'images appelée codage en sous-bandes vectorielles faisant appel à une opération fondée sur des vecteurs pour coder des images. Dans le codage en sous-bandes vectorielles, une image est d'abord décomposée en un ensemble de sous-bandes vectorielles à l'aide d'un banc de filtres vectoriels, avant que soit effectuée une quantification vectorielle sur chaque vecteur dans toutes les sous-bandes vectorielles. Le banc de filtres vectoriels permet non seulement de réduire la corrélation inter-vectorielle et inter-bandes, mais également de maintenir la corrélation intra-vectorielle. Grâce à cette caractéristique, on obtient une sensible augmentation de l'efficacité de l'opération de quantification vectorielle qui a lieu ensuite, tout en ayant un gain de codage important par rapport au codage en sous-bandes classique.
PCT/US1995/004144 1994-04-05 1995-04-04 Procede et appareil de compression d'images a l'aide d'un codeur en sous-bandes vectorielles WO1995027375A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US22329394A 1994-04-05 1994-04-05
US08/223,293 1994-04-05

Publications (1)

Publication Number Publication Date
WO1995027375A1 true WO1995027375A1 (fr) 1995-10-12

Family

ID=22835887

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US1995/004144 WO1995027375A1 (fr) 1994-04-05 1995-04-04 Procede et appareil de compression d'images a l'aide d'un codeur en sous-bandes vectorielles

Country Status (1)

Country Link
WO (1) WO1995027375A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0841818A1 (fr) * 1996-11-08 1998-05-13 Canon Kabushiki Kaisha Codage de signal numérique par décomposition en sous-bandes de fréquence et quantification vectorielle à états finis

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5136374A (en) * 1990-04-03 1992-08-04 At&T Bell Laboratories Geometric vector quantization
US5309232A (en) * 1992-02-07 1994-05-03 At&T Bell Laboratories Dynamic bit allocation for three-dimensional subband video coding

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5136374A (en) * 1990-04-03 1992-08-04 At&T Bell Laboratories Geometric vector quantization
US5309232A (en) * 1992-02-07 1994-05-03 At&T Bell Laboratories Dynamic bit allocation for three-dimensional subband video coding

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0841818A1 (fr) * 1996-11-08 1998-05-13 Canon Kabushiki Kaisha Codage de signal numérique par décomposition en sous-bandes de fréquence et quantification vectorielle à états finis
FR2755818A1 (fr) * 1996-11-08 1998-05-15 Canon Kk Codage de signal numerique par decomposition en sous-bandes de frequence et quantification vectorielle a etats finis
US5995027A (en) * 1996-11-08 1999-11-30 Canon Kabushiki Kaisha Digital-signal coding by breakdown into frequency subbands and finite state vectorial quantization

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