CA2470346C - Method and apparatus for extracting pixel values - Google Patents

Method and apparatus for extracting pixel values Download PDF

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Publication number
CA2470346C
CA2470346C CA2470346A CA2470346A CA2470346C CA 2470346 C CA2470346 C CA 2470346C CA 2470346 A CA2470346 A CA 2470346A CA 2470346 A CA2470346 A CA 2470346A CA 2470346 C CA2470346 C CA 2470346C
Authority
CA
Canada
Prior art keywords
dct
block
extracted
coefficients
pixels
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
CA2470346A
Other languages
English (en)
French (fr)
Other versions
CA2470346A1 (en
Inventor
Jianmin Jiang
Li-Qun Xu
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.)
British Telecommunications PLC
Original Assignee
British Telecommunications PLC
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 British Telecommunications PLC filed Critical British Telecommunications PLC
Publication of CA2470346A1 publication Critical patent/CA2470346A1/en
Application granted granted Critical
Publication of CA2470346C publication Critical patent/CA2470346C/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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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
    • H04N19/60—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using transform coding
    • H04N19/625—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using transform coding using discrete cosine transform [DCT]
    • 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
    • H04N19/44—Decoders specially adapted therefor, e.g. video decoders which are asymmetric with respect to the encoder
    • 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
    • H04N19/132—Sampling, masking or truncation of coding units, e.g. adaptive resampling, frame skipping, frame interpolation or high-frequency transform coefficient masking
    • 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
    • H04N19/169—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using adaptive coding characterised by the coding unit, i.e. the structural portion or semantic portion of the video signal being the object or the subject of the adaptive coding
    • H04N19/17—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using adaptive coding characterised by the coding unit, i.e. the structural portion or semantic portion of the video signal being the object or the subject of the adaptive coding the unit being an image region, e.g. an object
    • H04N19/176—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using adaptive coding characterised by the coding unit, i.e. the structural portion or semantic portion of the video signal being the object or the subject of the adaptive coding the unit being an image region, e.g. an object the region being a block, e.g. a macroblock
    • 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)
  • Physics & Mathematics (AREA)
  • Discrete Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Compression Or Coding Systems Of Tv Signals (AREA)
  • Compression Of Band Width Or Redundancy In Fax (AREA)
  • Complex Calculations (AREA)
  • Compression, Expansion, Code Conversion, And Decoders (AREA)
  • Image Processing (AREA)
CA2470346A 2002-01-07 2002-12-24 Method and apparatus for extracting pixel values Expired - Fee Related CA2470346C (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
EP02250075.5 2002-01-07
EP02250075 2002-01-07
PCT/GB2002/005924 WO2003058972A2 (en) 2002-01-07 2002-12-24 Method and apparatus for extracting pixel values

Publications (2)

Publication Number Publication Date
CA2470346A1 CA2470346A1 (en) 2003-07-17
CA2470346C true CA2470346C (en) 2012-05-01

Family

ID=8185628

Family Applications (1)

Application Number Title Priority Date Filing Date
CA2470346A Expired - Fee Related CA2470346C (en) 2002-01-07 2002-12-24 Method and apparatus for extracting pixel values

Country Status (8)

Country Link
US (1) US7444033B2 (enExample)
EP (1) EP1461958A2 (enExample)
JP (2) JP2005514880A (enExample)
KR (1) KR100964066B1 (enExample)
CN (1) CN100502510C (enExample)
AU (1) AU2002356326A1 (enExample)
CA (1) CA2470346C (enExample)
WO (1) WO2003058972A2 (enExample)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102007014590A1 (de) * 2006-04-11 2007-11-15 Mediatek Inc. Verfahren und System zur Bildüberlagerungsbearbeitung
JP4901450B2 (ja) * 2006-12-19 2012-03-21 株式会社東芝 動画像符号化装置
US8417045B2 (en) 2010-07-29 2013-04-09 Infoprint Solutions Company Llc Mechanism for processing order-16 discrete cosine transforms
CN109151480A (zh) * 2017-06-16 2019-01-04 宝山钢铁股份有限公司 一种视频编码无线传送接收装置及方法

Family Cites Families (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2103455A (en) 1981-07-22 1983-02-16 Post Office Method of transmitting an image and apparatus for carrying out the method
US5049992A (en) 1990-08-27 1991-09-17 Zenith Electronics Corporation HDTV system with receivers operable at different levels of resolution
US5703965A (en) * 1992-06-05 1997-12-30 The Regents Of The University Of California Image compression/decompression based on mathematical transform, reduction/expansion, and image sharpening
JPH06237386A (ja) 1993-02-10 1994-08-23 Ricoh Co Ltd 画像処理装置
US5828421A (en) 1994-10-11 1998-10-27 Hitachi America, Ltd. Implementation efficient digital picture-in-picture decoding methods and apparatus
EP0735772A3 (en) * 1995-03-27 1998-04-01 Hewlett-Packard Company Method for selecting JPEG quantization tables for low bandwidth applications
US6381369B1 (en) * 1996-07-17 2002-04-30 Sony Corporation Image coding apparatus, image coding method, image decoding method, image decoding apparatus, image data transmitting method and recording medium
US6473533B1 (en) * 1996-10-25 2002-10-29 Fuji Xerox Co., Ltd. Image encoding apparatus and image decoding apparatus
US6052703A (en) * 1998-05-12 2000-04-18 Oak Technology, Inc. Method and apparatus for determining discrete cosine transforms using matrix multiplication and modified booth encoding
SG75179A1 (en) * 1998-07-14 2000-09-19 Thomson Consumer Electronics System for deriving a decoded reduced-resolution video signal from a coded high-definition video signal
JP2000217112A (ja) * 1999-01-22 2000-08-04 Asahi Optical Co Ltd 画像圧縮伸張装置および画素数増加装置
CN1578159B (zh) * 2000-05-09 2010-05-26 索尼公司 数据处理装置和方法

Also Published As

Publication number Publication date
JP4515534B2 (ja) 2010-08-04
CA2470346A1 (en) 2003-07-17
KR100964066B1 (ko) 2010-06-16
KR20040070303A (ko) 2004-08-06
WO2003058972A9 (en) 2003-11-13
US7444033B2 (en) 2008-10-28
AU2002356326A8 (en) 2003-07-24
CN100502510C (zh) 2009-06-17
WO2003058972A2 (en) 2003-07-17
WO2003058972A3 (en) 2003-09-04
JP2010081618A (ja) 2010-04-08
JP2005514880A (ja) 2005-05-19
CN1613260A (zh) 2005-05-04
US20050065988A1 (en) 2005-03-24
EP1461958A2 (en) 2004-09-29
AU2002356326A1 (en) 2003-07-24

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