WO2011012669A2 - Method for decoding a stream of coded data representative of a sequence of images and method for coding a sequence of images - Google Patents

Method for decoding a stream of coded data representative of a sequence of images and method for coding a sequence of images Download PDF

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Publication number
WO2011012669A2
WO2011012669A2 PCT/EP2010/061013 EP2010061013W WO2011012669A2 WO 2011012669 A2 WO2011012669 A2 WO 2011012669A2 EP 2010061013 W EP2010061013 W EP 2010061013W WO 2011012669 A2 WO2011012669 A2 WO 2011012669A2
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WO
WIPO (PCT)
Prior art keywords
average
block
prediction
current block
avr
Prior art date
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Ceased
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PCT/EP2010/061013
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English (en)
French (fr)
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WO2011012669A3 (en
Inventor
Dominique Thoreau
Edouard Francois
Jérôme Vieron
Fabien Racape
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Thomson Licensing SAS
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Thomson Licensing SAS
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Filing date
Publication date
Application filed by Thomson Licensing SAS filed Critical Thomson Licensing SAS
Priority to EP10742453.3A priority Critical patent/EP2460355B1/en
Priority to KR1020127002427A priority patent/KR101681353B1/ko
Priority to CN201080033641.7A priority patent/CN102474608B/zh
Priority to US13/388,047 priority patent/US9008178B2/en
Priority to JP2012522170A priority patent/JP5545783B2/ja
Publication of WO2011012669A2 publication Critical patent/WO2011012669A2/en
Publication of WO2011012669A3 publication Critical patent/WO2011012669A3/en
Anticipated expiration legal-status Critical
Ceased 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
    • H04N19/10—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
    • H04N19/103—Selection of coding mode or of prediction mode
    • H04N19/105—Selection of the reference unit for prediction within a chosen coding or prediction mode, e.g. adaptive choice of position and number of pixels used for prediction
    • 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
    • H04N19/10—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
    • H04N19/136—Incoming video signal characteristics or properties
    • H04N19/137—Motion inside a coding unit, e.g. average field, frame or block difference
    • 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
    • H04N19/157—Assigned coding mode, i.e. the coding mode being predefined or preselected to be further used for selection of another element or parameter
    • H04N19/159—Prediction type, e.g. intra-frame, inter-frame or bidirectional frame prediction
    • 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
    • H04N19/46—Embedding additional information in the video signal during the compression process
    • 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
    • H04N19/50—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using predictive coding
    • H04N19/503—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using predictive coding involving temporal prediction

Definitions

  • the invention relates to a method for decoding a stream of coded data representative of a sequence of images divided into blocks comprising the following steps for a current block:
  • the weighted prediction parameter is determined according to the following steps:
  • the initial weighted prediction parameter is determined for a part of the image to which the current block belongs according to the following steps:
  • step 2 the average avr pre d of the prediction block Bpred is determined.
  • a(.) and b(.) are the coefficients of linear filters.
  • (k,l) are integer numbers that vary for example from -1 to 1.
  • a() may take the following values:
  • the average avr pre d is equal to the average of luminance and chrominance values associated with the pixels of the prediction block Bpred.
  • the average avr pr ⁇ d is equal to the average of chrominance values associated with the pixels of the prediction block Bpred. The same variants apply to the calculation of the average avr cr of the current block Bc.
  • Bres(i,j) £a'(k,l)*Bcur(i + k,j + l)-wp cr dec *£b'(k,l)*Bpred(i + kJ + l)
  • I resDC is thus the DC coefficient effectively coded in the stream F.
  • the block of coefficients thus modified is then quantized and coded by entropy coding.
  • entropy coding method well known to those skilled in the art of entropy coding VLC (Variable Length Coding) type video coders, using for example the pre-calculated VLC tables as described in chapter 3.5.2 of the book by I. E. Richardson entitled “H.264 and MPEG-4 video compression” published by J. Wiley & Sons in September 2003 is used.
  • a CABAC Context-based Adaptive Binary Arithmetic Coding

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Compression Or Coding Systems Of Tv Signals (AREA)
PCT/EP2010/061013 2009-07-30 2010-07-29 Method for decoding a stream of coded data representative of a sequence of images and method for coding a sequence of images Ceased WO2011012669A2 (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
EP10742453.3A EP2460355B1 (en) 2009-07-30 2010-07-29 Method for decoding a stream of coded data representative of a sequence of images and method for coding a sequence of images
KR1020127002427A KR101681353B1 (ko) 2009-07-30 2010-07-29 이미지 시퀀스를 나타내는 코딩된 데이터의 스트림을 디코딩하는 방법 및 이미지 시퀀스를 코딩하는 방법
CN201080033641.7A CN102474608B (zh) 2009-07-30 2010-07-29 解码代表图像序列的编码数据流的方法和编码图像序列的方法
US13/388,047 US9008178B2 (en) 2009-07-30 2010-07-29 Method for decoding a stream of coded data representative of a sequence of images and method for coding a sequence of images
JP2012522170A JP5545783B2 (ja) 2009-07-30 2010-07-29 画像シーケンスを表す符号化されたデータのストリームを復号する方法および画像シーケンスを符号化する方法

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR0955353A FR2948845A1 (fr) 2009-07-30 2009-07-30 Procede de decodage d'un flux representatif d'une sequence d'images et procede de codage d'une sequence d'images
FR0955353 2009-07-30

Publications (2)

Publication Number Publication Date
WO2011012669A2 true WO2011012669A2 (en) 2011-02-03
WO2011012669A3 WO2011012669A3 (en) 2011-04-14

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PCT/EP2010/061013 Ceased WO2011012669A2 (en) 2009-07-30 2010-07-29 Method for decoding a stream of coded data representative of a sequence of images and method for coding a sequence of images

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US (1) US9008178B2 (enExample)
EP (1) EP2460355B1 (enExample)
JP (1) JP5545783B2 (enExample)
KR (1) KR101681353B1 (enExample)
CN (1) CN102474608B (enExample)
FR (1) FR2948845A1 (enExample)
WO (1) WO2011012669A2 (enExample)

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Also Published As

Publication number Publication date
WO2011012669A3 (en) 2011-04-14
US20120128068A1 (en) 2012-05-24
KR101681353B1 (ko) 2016-11-30
JP5545783B2 (ja) 2014-07-09
FR2948845A1 (fr) 2011-02-04
CN102474608A (zh) 2012-05-23
CN102474608B (zh) 2014-10-29
EP2460355B1 (en) 2016-08-31
JP2013500661A (ja) 2013-01-07
KR20120039675A (ko) 2012-04-25
EP2460355A2 (en) 2012-06-06
US9008178B2 (en) 2015-04-14

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