FR2410401A1 - IMAGE SIGNAL ENCODER DEVICE - Google Patents

IMAGE SIGNAL ENCODER DEVICE

Info

Publication number
FR2410401A1
FR2410401A1 FR7833585A FR7833585A FR2410401A1 FR 2410401 A1 FR2410401 A1 FR 2410401A1 FR 7833585 A FR7833585 A FR 7833585A FR 7833585 A FR7833585 A FR 7833585A FR 2410401 A1 FR2410401 A1 FR 2410401A1
Authority
FR
France
Prior art keywords
image signal
image
signal encoder
encoder device
resolution component
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
FR7833585A
Other languages
French (fr)
Other versions
FR2410401B1 (en
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.)
Nippon Telegraph and Telephone Corp
Original Assignee
Nippon Telegraph and Telephone Corp
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
Priority claimed from JP14238977A external-priority patent/JPS5474623A/en
Priority claimed from JP638978A external-priority patent/JPS5499513A/en
Priority claimed from JP639078A external-priority patent/JPS5499514A/en
Priority claimed from JP638878A external-priority patent/JPS5499512A/en
Application filed by Nippon Telegraph and Telephone Corp filed Critical Nippon Telegraph and Telephone Corp
Publication of FR2410401A1 publication Critical patent/FR2410401A1/en
Application granted granted Critical
Publication of FR2410401B1 publication Critical patent/FR2410401B1/fr
Granted 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
    • H04N19/90—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
    • H04N19/98—Adaptive-dynamic-range coding [ADRC]

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)
  • Image Processing (AREA)

Abstract

APPAREIL CODEUR DE SIGNAUX D'IMAGE. UN CADRE D'IMAGE A ECHELLE DE GRIS EST DIVISE EN BLOCS DANS CHACUN DESQUELS LA LUNINANCE MOYENNE D'ELEMENTS D'IMAGE SERT DE VALEUR DE SEUIL DE COMPARAISON AVEC CHAQUE SIGNAL D'IMAGE EN VUE DE SA CLASSIFICATION EN 0 OU 1 SUIVANT SA GRANDEUR ET DE LA FORMATION D'UNE COMPOSANTE DE RESOLUTION. EN FONCTION DE CELLE-CI ET DE CHAQUE SIGNAL D'ELEMENT D'IMAGE, ON CALCULE DEUX COMPOSANTES DE GRIS, QUE L'ON UTILISE AVEC LA COMPOSANTE DE RESOLUTION COMME SORTIES CODEES POUR CHAQUE BLOC. APPLICABLE NOTAMMENT AU CODAGE D'IMAGES FIXES.IMAGE SIGNAL ENCODER APPARATUS. A GRAY SCALE IMAGE FRAME IS DIVIDED INTO BLOCKS IN WHICH THE AVERAGE LUNINANCE OF IMAGE ELEMENTS SERVES AS THE THRESHOLD VALUE OF COMPARISON WITH EACH IMAGE SIGNAL IN VIEW OF ITS CLASSIFICATION IN 0 OR 1 ACCORDING TO ITS SIZE AND THE FORMATION OF A RESOLUTION COMPONENT. AS A FUNCTION OF THIS AND EACH IMAGE ELEMENT SIGNAL, TWO GRAY COMPONENTS ARE CALCULATED, USED WITH THE RESOLUTION COMPONENT AS THE CODED OUTPUTS FOR EACH BLOCK. APPLICABLE IN PARTICULAR TO THE CODING OF STILL IMAGES.

FR7833585A 1977-11-28 1978-11-28 IMAGE SIGNAL ENCODER DEVICE Granted FR2410401A1 (en)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
JP14238977A JPS5474623A (en) 1977-11-28 1977-11-28 Coding processing system for video signal
JP638978A JPS5499513A (en) 1978-01-24 1978-01-24 Encoding system of picture signal
JP639078A JPS5499514A (en) 1978-01-24 1978-01-24 Encoding process system for picture signal
JP638878A JPS5499512A (en) 1978-01-24 1978-01-24 Encoding/decoding process system for picture signal

Publications (2)

Publication Number Publication Date
FR2410401A1 true FR2410401A1 (en) 1979-06-22
FR2410401B1 FR2410401B1 (en) 1984-06-29

Family

ID=27454474

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7833585A Granted FR2410401A1 (en) 1977-11-28 1978-11-28 IMAGE SIGNAL ENCODER DEVICE

Country Status (3)

Country Link
DE (1) DE2851481C2 (en)
FR (1) FR2410401A1 (en)
GB (1) GB2009568B (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2437124A1 (en) * 1978-09-19 1980-04-18 Western Electric Co DIGITAL ENCODER FOR TRANSMISSION OF FAC-SIMILES

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4319267A (en) * 1979-02-16 1982-03-09 Nippon Telegraph And Telephone Public Corporation Picture coding and/or decoding equipment
DE3043521A1 (en) * 1980-11-18 1982-06-24 Agfa-Gevaert Ag, 5090 Leverkusen Digital processing of document scan - uses nonlinearly encoded digital signal to give image-improving weighting
US4409623A (en) * 1981-01-31 1983-10-11 Nippon Telegraph & Telephone Public Corporation Method and equipment for processing gray scale facsimile signal
GB2129652B (en) * 1982-10-27 1986-06-04 Matsushita Electric Ind Co Ltd Method and apparatus for processing image signal
GB2149994B (en) * 1983-11-14 1987-05-20 Matsushita Electric Ind Co Ltd Method and apparatus for processing video signals
JPS6186834A (en) * 1984-10-04 1986-05-02 Olympus Optical Co Ltd Transfer device for picture data
GB2173675A (en) * 1985-03-22 1986-10-15 Steven Henry Lerman Communication system
DE4027897C2 (en) * 1989-09-05 1996-07-18 Canon Kk Image processing device
GB2238928B (en) * 1989-09-05 1994-06-08 Canon Kk Image data converting method and image processing apparatus

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3403226A (en) * 1965-09-30 1968-09-24 Bell Telephone Labor Inc Reduced bandwidth dual mode encoding of video signals
US3940555A (en) * 1972-08-23 1976-02-24 Kokusai Denshin Denwa Kabushiki Kaisha Picture signal transmission system
US3984626A (en) * 1975-08-01 1976-10-05 Bell Telephone Laboratories, Incorporated Picture signal coder
FR2329124A1 (en) * 1975-10-24 1977-05-20 Telecommunications Sa MATRIX-TRANSFORMED IMAGE ENCODER-DECODER WITH WEIGHTING OF THE CONTRIBUTIONS OF THE IMAGE POINTS TO THE FORMATION OF THE TRANSFORMATION

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2020639A1 (en) * 1970-04-28 1971-11-18 Bosch Elektronik Gmbh Method for the electrical transmission of original images
US4032977A (en) * 1976-06-03 1977-06-28 Xerox Corporation Gray scale interpolation technique

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3403226A (en) * 1965-09-30 1968-09-24 Bell Telephone Labor Inc Reduced bandwidth dual mode encoding of video signals
US3940555A (en) * 1972-08-23 1976-02-24 Kokusai Denshin Denwa Kabushiki Kaisha Picture signal transmission system
US3984626A (en) * 1975-08-01 1976-10-05 Bell Telephone Laboratories, Incorporated Picture signal coder
FR2329124A1 (en) * 1975-10-24 1977-05-20 Telecommunications Sa MATRIX-TRANSFORMED IMAGE ENCODER-DECODER WITH WEIGHTING OF THE CONTRIBUTIONS OF THE IMAGE POINTS TO THE FORMATION OF THE TRANSFORMATION

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
EXBK/78 *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2437124A1 (en) * 1978-09-19 1980-04-18 Western Electric Co DIGITAL ENCODER FOR TRANSMISSION OF FAC-SIMILES

Also Published As

Publication number Publication date
GB2009568B (en) 1982-03-24
DE2851481A1 (en) 1979-05-31
DE2851481C2 (en) 1982-05-06
FR2410401B1 (en) 1984-06-29
GB2009568A (en) 1979-06-13

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