GB2264609B - An apparatus and method for compressing still images - Google Patents

An apparatus and method for compressing still images

Info

Publication number
GB2264609B
GB2264609B GB9304142A GB9304142A GB2264609B GB 2264609 B GB2264609 B GB 2264609B GB 9304142 A GB9304142 A GB 9304142A GB 9304142 A GB9304142 A GB 9304142A GB 2264609 B GB2264609 B GB 2264609B
Authority
GB
United Kingdom
Prior art keywords
still images
compressing still
compressing
images
still
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
GB9304142A
Other versions
GB2264609A (en
GB9304142D0 (en
Inventor
Martin P Boliek
James D Allen
Steven Michael Blonstein
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.)
Ricoh Co Ltd
Original Assignee
Ricoh Co Ltd
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 Ricoh Co Ltd filed Critical Ricoh Co Ltd
Publication of GB9304142D0 publication Critical patent/GB9304142D0/en
Publication of GB2264609A publication Critical patent/GB2264609A/en
Application granted granted Critical
Publication of GB2264609B publication Critical patent/GB2264609B/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F17/00—Digital computing or data processing equipment or methods, specially adapted for specific functions
    • G06F17/10—Complex mathematical operations
    • G06F17/14—Fourier, Walsh or analogous domain transformations, e.g. Laplace, Hilbert, Karhunen-Loeve, transforms
    • G06F17/147—Discrete orthonormal transforms, e.g. discrete cosine transform, discrete sine transform, and variations therefrom, e.g. modified discrete cosine transform, integer transforms approximating the discrete cosine transform
    • 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
    • H04N19/126—Details of normalisation or weighting functions, e.g. normalisation matrices or variable uniform quantisers
    • 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
    • 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

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Mathematical Physics (AREA)
  • Pure & Applied Mathematics (AREA)
  • Data Mining & Analysis (AREA)
  • Computational Mathematics (AREA)
  • Mathematical Analysis (AREA)
  • Mathematical Optimization (AREA)
  • Signal Processing (AREA)
  • Multimedia (AREA)
  • Theoretical Computer Science (AREA)
  • Databases & Information Systems (AREA)
  • Discrete Mathematics (AREA)
  • Software Systems (AREA)
  • General Engineering & Computer Science (AREA)
  • Algebra (AREA)
  • Compression Or Coding Systems Of Tv Signals (AREA)
  • Compression, Expansion, Code Conversion, And Decoders (AREA)
  • Complex Calculations (AREA)
  • Image Processing (AREA)
  • Compression Of Band Width Or Redundancy In Fax (AREA)
GB9304142A 1992-02-28 1993-03-01 An apparatus and method for compressing still images Expired - Fee Related GB2264609B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US84376592A 1992-02-28 1992-02-28

Publications (3)

Publication Number Publication Date
GB9304142D0 GB9304142D0 (en) 1993-04-14
GB2264609A GB2264609A (en) 1993-09-01
GB2264609B true GB2264609B (en) 1996-01-10

Family

ID=25290953

Family Applications (1)

Application Number Title Priority Date Filing Date
GB9304142A Expired - Fee Related GB2264609B (en) 1992-02-28 1993-03-01 An apparatus and method for compressing still images

Country Status (3)

Country Link
JP (1) JP3155383B2 (en)
DE (1) DE4306010C2 (en)
GB (1) GB2264609B (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3971135B2 (en) * 2001-07-11 2007-09-05 株式会社テクノマセマティカル DCT matrix decomposition method and DCT apparatus
US7123655B2 (en) 2001-08-09 2006-10-17 Sharp Laboratories Of America, Inc. Method for reduced bit-depth quantization
JP4507265B2 (en) 2008-06-30 2010-07-21 ルネサスエレクトロニクス株式会社 Image processing circuit, and display panel driver and display device having the same
WO2010091930A2 (en) * 2009-02-12 2010-08-19 Zoran (France) Frame buffer compression for video processing devices

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5129015A (en) * 1990-04-19 1992-07-07 Ricoh Company Ltd. Apparatus and method for compressing still images without multiplication
GB2253113A (en) * 1991-01-02 1992-08-26 Ricoh Kk Rounding numbers in quantization method used for image compression
GB2259215A (en) * 1991-08-09 1993-03-03 Ricoh Kk An apparatus and method for compressing still images
GB2259824A (en) * 1991-09-19 1993-03-24 Sony Broadcast & Communication Image data compression with dynamically controlled quantiser

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5021891A (en) * 1990-02-27 1991-06-04 Qualcomm, Inc. Adaptive block size image compression method and system
US5305399A (en) * 1990-04-19 1994-04-19 Ricoh Corporation Two dimensional shift-array for use in image compression VLSI

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5129015A (en) * 1990-04-19 1992-07-07 Ricoh Company Ltd. Apparatus and method for compressing still images without multiplication
GB2253113A (en) * 1991-01-02 1992-08-26 Ricoh Kk Rounding numbers in quantization method used for image compression
GB2259215A (en) * 1991-08-09 1993-03-03 Ricoh Kk An apparatus and method for compressing still images
GB2259824A (en) * 1991-09-19 1993-03-24 Sony Broadcast & Communication Image data compression with dynamically controlled quantiser

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
RK Richards, "Arithmetic operations in digital computers, D van Nostrand Co, 1955. See pp 20 to 21. *

Also Published As

Publication number Publication date
GB2264609A (en) 1993-09-01
DE4306010C2 (en) 1997-11-06
JP3155383B2 (en) 2001-04-09
JPH0646269A (en) 1994-02-18
DE4306010A1 (en) 1993-09-23
GB9304142D0 (en) 1993-04-14

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Legal Events

Date Code Title Description
PCNP Patent ceased through non-payment of renewal fee

Effective date: 20080301