DE69126198T2 - Datendekodierungsvorrichtung - Google Patents

Datendekodierungsvorrichtung

Info

Publication number
DE69126198T2
DE69126198T2 DE1991626198 DE69126198T DE69126198T2 DE 69126198 T2 DE69126198 T2 DE 69126198T2 DE 1991626198 DE1991626198 DE 1991626198 DE 69126198 T DE69126198 T DE 69126198T DE 69126198 T2 DE69126198 T2 DE 69126198T2
Authority
DE
Germany
Prior art keywords
decoding device
data decoding
data
decoding
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.)
Expired - Fee Related
Application number
DE1991626198
Other languages
English (en)
Other versions
DE69126198D1 (de
Inventor
Jean-Swey Kao
Simon M Law
Li-Fung Cheung
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.)
Xerox Corp
Original Assignee
Xerox 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 US07/632,779 external-priority patent/US5206734A/en
Priority claimed from US07/632,781 external-priority patent/US5229863A/en
Application filed by Xerox Corp filed Critical Xerox Corp
Publication of DE69126198D1 publication Critical patent/DE69126198D1/de
Application granted granted Critical
Publication of DE69126198T2 publication Critical patent/DE69126198T2/de
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N1/00—Scanning, transmission or reproduction of documents or the like, e.g. facsimile transmission; Details thereof
    • H04N1/41—Bandwidth or redundancy reduction
    • H04N1/411—Bandwidth or redundancy reduction for the transmission or storage or reproduction of two-tone pictures, e.g. black and white pictures
    • H04N1/413—Systems or arrangements allowing the picture to be reproduced without loss or modification of picture-information
    • H04N1/417—Systems or arrangements allowing the picture to be reproduced without loss or modification of picture-information using predictive or differential encoding
    • H04N1/4175—Systems or arrangements allowing the picture to be reproduced without loss or modification of picture-information using predictive or differential encoding involving the encoding of tone transitions with respect to tone transitions in a reference line
    • 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
    • H03M7/42—Conversion to or from variable length codes, e.g. Shannon-Fano code, Huffman code, Morse code using table look-up for the coding or decoding process, e.g. using read-only memory
    • H03M7/425—Conversion to or from variable length codes, e.g. Shannon-Fano code, Huffman code, Morse code using table look-up for the coding or decoding process, e.g. using read-only memory for the decoding process only
    • 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
    • H03M7/46—Conversion to or from run-length codes, i.e. by representing the number of consecutive digits, or groups of digits, of the same kind by a code word and a digit indicative of that kind

Landscapes

  • Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Compression Or Coding Systems Of Tv Signals (AREA)
  • Compression, Expansion, Code Conversion, And Decoders (AREA)
DE1991626198 1990-12-24 1991-12-23 Datendekodierungsvorrichtung Expired - Fee Related DE69126198T2 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US07/632,779 US5206734A (en) 1990-12-24 1990-12-24 Look ahead for high speed CCITT decompressor
US07/632,781 US5229863A (en) 1990-12-24 1990-12-24 High speed CCITT decompressor

Publications (2)

Publication Number Publication Date
DE69126198D1 DE69126198D1 (de) 1997-06-26
DE69126198T2 true DE69126198T2 (de) 1997-12-04

Family

ID=27091720

Family Applications (1)

Application Number Title Priority Date Filing Date
DE1991626198 Expired - Fee Related DE69126198T2 (de) 1990-12-24 1991-12-23 Datendekodierungsvorrichtung

Country Status (2)

Country Link
EP (1) EP0493086B1 (de)
DE (1) DE69126198T2 (de)

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5325092A (en) * 1992-07-07 1994-06-28 Ricoh Company, Ltd. Huffman decoder architecture for high speed operation and reduced memory
JP3136796B2 (ja) * 1992-09-24 2001-02-19 ソニー株式会社 可変長符号デコーダ
EP0629050B1 (de) * 1993-06-10 2001-10-17 Koninklijke Philips Electronics N.V. Dekodierer für Wörter variabler Länge mit hohem Durchfluss und Vorrichtung mit einem solchen Dekodierer
FR2716054B1 (fr) * 1994-02-04 1996-04-19 Sgs Thomson Microelectronics Etage de décalage pour décodeur de codes numériques de longueurs variables.
FR2722041B1 (fr) * 1994-06-30 1998-01-02 Samsung Electronics Co Ltd Decodeur de huffman
US6002801A (en) * 1995-04-18 1999-12-14 Advanced Micro Devices, Inc. Method and apparatus for improved video decompression by selection of IDCT method based on image characteristics
US5864637A (en) * 1995-04-18 1999-01-26 Advanced Micro Devices, Inc. Method and apparatus for improved video decompression by selective reduction of spatial resolution
US5872866A (en) * 1995-04-18 1999-02-16 Advanced Micro Devices, Inc. Method and apparatus for improved video decompression by predetermination of IDCT results based on image characteristics
WO1996033558A1 (en) * 1995-04-18 1996-10-24 Advanced Micro Devices, Inc. Method and apparatus for hybrid vlc bitstream decoding
JP2945324B2 (ja) * 1995-07-11 1999-09-06 ゼロックス コーポレイション 圧縮解除装置及びその方法
KR100203246B1 (ko) * 1995-10-19 1999-06-15 윤종용 고속의 가변장복호화장치

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6019360A (ja) * 1983-07-12 1985-01-31 Nec Corp フアクシミリの復号化回路
JPS61234664A (ja) * 1985-04-10 1986-10-18 Oki Electric Ind Co Ltd 復号化回路
DE3689893T2 (de) * 1985-08-08 1994-11-03 Canon Kk Gerät zum Dekodieren eines Bildkodes.
JPS63138881A (ja) * 1986-11-29 1988-06-10 Hitachi Ltd Ｍｒ符号伸長装置

Also Published As

Publication number Publication date
DE69126198D1 (de) 1997-06-26
EP0493086A3 (en) 1993-05-19
EP0493086A2 (de) 1992-07-01
EP0493086B1 (de) 1997-05-21

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Legal Events

Date Code Title Description
8364 No opposition during term of opposition
8339 Ceased/non-payment of the annual fee