FR2393366A1 - Procede et dispositif de codage pour la transformation adaptative d'images - Google Patents

Procede et dispositif de codage pour la transformation adaptative d'images

Info

Publication number
FR2393366A1
FR2393366A1 FR7803998A FR7803998A FR2393366A1 FR 2393366 A1 FR2393366 A1 FR 2393366A1 FR 7803998 A FR7803998 A FR 7803998A FR 7803998 A FR7803998 A FR 7803998A FR 2393366 A1 FR2393366 A1 FR 2393366A1
Authority
FR
France
Prior art keywords
image
transformation
coding method
image transformation
adaptive image
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
Application number
FR7803998A
Other languages
English (en)
Other versions
FR2393366B1 (fr
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Koninklijke Philips NV
Original Assignee
Philips Gloeilampenfabrieken NV
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 Philips Gloeilampenfabrieken NV filed Critical Philips Gloeilampenfabrieken NV
Publication of FR2393366A1 publication Critical patent/FR2393366A1/fr
Application granted granted Critical
Publication of FR2393366B1 publication Critical patent/FR2393366B1/fr
Expired legal-status Critical Current

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
    • H04N19/10—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using adaptive coding
    • H04N19/134—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using adaptive coding characterised by the element, parameter or criterion affecting or controlling the adaptive coding
    • H04N19/154—Measured or subjectively estimated visual quality after decoding, e.g. measurement of distortion
    • 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

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Compression Or Coding Systems Of Tv Signals (AREA)
  • Compression, Expansion, Code Conversion, And Decoders (AREA)
  • Facsimile Image Signal Circuits (AREA)
  • Transmission Systems Not Characterized By The Medium Used For Transmission (AREA)
  • Image Processing (AREA)
  • Testing, Inspecting, Measuring Of Stereoscopic Televisions And Televisions (AREA)

Abstract

On connaît un certain nombre d'algorithmes de transformation (Fourier, Walsh-Hadamard, Karhunen-Loéve) pour diminuer la redondance lors de la transmission ou l'enregistrement d'images. Dans tous les autres cas, des défauts visibles apparaissent dans l'image reconstituée. La présente invention propose d'analyser séquentiellement les coefficients de base obtenus par transformation afin de se rendre compte si, dans une classe de rangs, ces coefficients dépassent une valeur prédéterminée, par exemple la valeur moyenne de l'image entière, tout en calculant, en outre, le nombre de dépassements. On forme des classes d'activité qui indiquent pour quel rang l'image est active, la caractéristique du dispositif de quantification étant rendue dépendante de cette constatation. Application au codage de signaux de télévision.
FR7803998A 1977-02-12 1978-02-13 Procede et dispositif de codage pour la transformation adaptative d'images Expired FR2393366B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE2706080A DE2706080C2 (de) 1977-02-12 1977-02-12 Verfahren zur adaptiven Quantisierung von Transformationskoeffizienten eines Bildes und Anordnung zum Durchführen des Verfahrens

Publications (2)

Publication Number Publication Date
FR2393366A1 true FR2393366A1 (fr) 1978-12-29
FR2393366B1 FR2393366B1 (fr) 1985-09-27

Family

ID=6001077

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7803998A Expired FR2393366B1 (fr) 1977-02-12 1978-02-13 Procede et dispositif de codage pour la transformation adaptative d'images

Country Status (5)

Country Link
US (1) US4225885A (fr)
JP (1) JPS53101925A (fr)
DE (1) DE2706080C2 (fr)
FR (1) FR2393366B1 (fr)
GB (1) GB1590492A (fr)

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NL8003873A (nl) * 1980-07-04 1982-02-01 Philips Nv Werkwijze voor het digitaliseren van een tijd-discreet videosignaal met toepassing van een beeld-transformatie.
US4545031A (en) * 1981-09-17 1985-10-01 Kita Electrics Co., Ltd. Photo-electric apparatus for monitoring printed papers
US4541012A (en) * 1982-01-04 1985-09-10 Compression Labs, Inc. Video bandwidth reduction system employing interframe block differencing and transform domain coding
US4682248A (en) * 1983-04-19 1987-07-21 Compusonics Video Corporation Audio and video digital recording and playback system
US4755889A (en) * 1983-04-19 1988-07-05 Compusonics Video Corporation Audio and video digital recording and playback system
JPS60180388A (ja) * 1984-02-28 1985-09-14 Kokusai Denshin Denwa Co Ltd <Kdd> 符号化された画像信号の再量子化方法
US5267330A (en) * 1984-06-19 1993-11-30 Canon Kabushiki Kaisha Image processing apparatus
DE3513074A1 (de) * 1985-04-12 1986-10-23 Telefunken Fernseh Und Rundfunk Gmbh, 3000 Hannover Verfahren zur digitalen nachrichtenuebertragung
JP2745300B2 (ja) * 1986-01-27 1998-04-28 富士写真フイルム株式会社 画像データの直交変換符号化方法
EP0231021B1 (fr) * 1986-01-27 1994-12-14 Fuji Photo Film Co., Ltd. Procédé de codage de signal d'image par transformation orthogonal
DE3685878D1 (de) * 1986-03-14 1992-08-06 Ant Nachrichtentech Verfahren zur verringerung der datenmenge bei der bildkodierung.
US4776030A (en) * 1986-03-28 1988-10-04 Gte Laboratories Incorporated Block quantizer for transform coding
US4920426A (en) * 1986-11-10 1990-04-24 Kokusai Denshin Denwa Co., Ltd. Image coding system coding digital image signals by forming a histogram of a coefficient signal sequence to estimate an amount of information
JP2604762B2 (ja) * 1986-11-10 1997-04-30 国際電信電話株式会社 画像符号化装置
US4868653A (en) * 1987-10-05 1989-09-19 Intel Corporation Adaptive digital video compression system
US4785349A (en) * 1987-10-05 1988-11-15 Technology Inc. 64 Digital video decompression system
FR2640840B1 (fr) * 1988-12-16 1994-02-25 Thomson Csf Procede de codage d'une suite d'images, par une transformation et une pluralite de codes a longueur variable, et dispositifs pour la mise en oeuvre de ce procede
DE68909592T2 (de) * 1989-07-04 1994-05-11 Rai Radiotelevisione Italiana Vorrichtung zur Redundanzreduktion in Blöcken digitaler Videodaten in DCT-Kodierung.
JP2921879B2 (ja) * 1989-09-29 1999-07-19 株式会社東芝 画像データ処理装置
US5063608A (en) * 1989-11-03 1991-11-05 Datacube Inc. Adaptive zonal coder
DE69131808T2 (de) * 1990-07-31 2000-03-16 Fujitsu Ltd Verfahren und Gerät zur Bilddatenverarbeitung
US5179378A (en) * 1991-07-30 1993-01-12 University Of South Florida Method and apparatus for the compression and decompression of data using Lempel-Ziv based techniques
US5838834A (en) * 1991-11-07 1998-11-17 Canon Kabushiki Kaisha Image processing apparatus and method for quantizing image data and quantization errors using single quantizing unit and pluralities of quantization tables
US6028961A (en) * 1992-07-31 2000-02-22 Canon Kabushiki Kaisha Image processing method and apparatus
EP0586074B1 (fr) * 1992-07-31 2001-11-14 Canon Kabushiki Kaisha Appareil et méthode de traitement d'images pour la compression multiphase
CN1092446C (zh) * 1993-05-31 2002-10-09 佳能株式会社 图象处理方法和装置
US5719961A (en) * 1994-07-22 1998-02-17 Apple Computer, Inc. Adaptive technique for encoder and decoder signal transformation
WO1997016918A2 (fr) * 1995-10-20 1997-05-09 Kiwisoft Programs Limited Procede de compression pour balayage d'images
US6792154B1 (en) 1999-10-07 2004-09-14 World Multicast.com, Inc Video compression system and method using time

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3715724A (en) * 1969-12-24 1973-02-06 Olivetti & Co Spa Apparatus for recognizing graphic symbols
US3662341A (en) * 1970-09-25 1972-05-09 Ibm Video-derived segmentation-gating apparatus for optical character recognition
JPS5231134B2 (fr) * 1972-01-24 1977-08-12
JPS5433496B2 (fr) * 1972-04-18 1979-10-20
JPS571953B2 (fr) * 1972-08-25 1982-01-13
FR2231972B1 (fr) * 1973-05-29 1977-04-29 Electricite De France
US3973239A (en) * 1973-10-17 1976-08-03 Hitachi, Ltd. Pattern preliminary processing system
US3935562A (en) * 1974-02-22 1976-01-27 Stephens Richard G Pattern recognition method and apparatus
JPS512336A (ja) * 1974-05-22 1976-01-09 Nippon Telegraph & Telephone Terebishingofugokahoshiki
IT1055430B (it) * 1976-02-23 1981-12-21 Tasco Spa Procedimento e apparecchiatura per il riconoscimento in tempo reale di immagini

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
EXBK/71 *
EXBK/75 *

Also Published As

Publication number Publication date
JPS6248437B2 (fr) 1987-10-14
FR2393366B1 (fr) 1985-09-27
US4225885A (en) 1980-09-30
DE2706080A1 (de) 1978-08-17
JPS53101925A (en) 1978-09-05
DE2706080C2 (de) 1986-10-23
GB1590492A (en) 1981-06-03

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