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1. WO2012077575 - ENCODING APPARATUS AND ENCODING METHOD, AND DECODING APPARATUS AND DECODING METHOD

Publication Number WO/2012/077575
Publication Date 14.06.2012
International Application No. PCT/JP2011/077842
International Filing Date 01.12.2011
IPC
H04N 19/50 2014.01
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
NPICTORIAL COMMUNICATION, e.g. TELEVISION
19Methods or arrangements for coding, decoding, compressing or decompressing digital video signals
50using predictive coding
H04N 19/107 2014.01
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
NPICTORIAL COMMUNICATION, e.g. TELEVISION
19Methods or arrangements for coding, decoding, compressing or decompressing digital video signals
10using adaptive coding
102characterised by the element, parameter or selection affected or controlled by the adaptive coding
103Selection of coding mode or of prediction mode
107between spatial and temporal predictive coding, e.g. picture refresh
H04N 19/11 2014.01
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
NPICTORIAL COMMUNICATION, e.g. TELEVISION
19Methods or arrangements for coding, decoding, compressing or decompressing digital video signals
10using adaptive coding
102characterised by the element, parameter or selection affected or controlled by the adaptive coding
103Selection of coding mode or of prediction mode
11among a plurality of spatial predictive coding modes
H04N 19/129 2014.01
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
NPICTORIAL COMMUNICATION, e.g. TELEVISION
19Methods or arrangements for coding, decoding, compressing or decompressing digital video signals
10using adaptive coding
102characterised by the element, parameter or selection affected or controlled by the adaptive coding
129Scanning of coding units, e.g. zig-zag scan of transform coefficients or flexible macroblock ordering
H04N 19/134 2014.01
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
NPICTORIAL COMMUNICATION, e.g. TELEVISION
19Methods or arrangements for coding, decoding, compressing or decompressing digital video signals
10using adaptive coding
134characterised by the element, parameter or criterion affecting or controlling the adaptive coding
H04N 19/136 2014.01
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
NPICTORIAL COMMUNICATION, e.g. TELEVISION
19Methods or arrangements for coding, decoding, compressing or decompressing digital video signals
10using adaptive coding
134characterised by the element, parameter or criterion affecting or controlling the adaptive coding
136Incoming video signal characteristics or properties
CPC
H04N 19/11
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
NPICTORIAL COMMUNICATION, e.g. TELEVISION
19Methods or arrangements for coding, decoding, compressing or decompressing digital video signals
10using adaptive coding
102characterised by the element, parameter or selection affected or controlled by the adaptive coding
103Selection of coding mode or of prediction mode
11among a plurality of spatial predictive coding modes
H04N 19/12
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
NPICTORIAL COMMUNICATION, e.g. TELEVISION
19Methods or arrangements for coding, decoding, compressing or decompressing digital video signals
10using adaptive coding
102characterised by the element, parameter or selection affected or controlled by the adaptive coding
12Selection from among a plurality of transforms or standards, e.g. selection between discrete cosine transform [DCT] and sub-band transform or selection between H.263 and H.264
H04N 19/14
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
NPICTORIAL COMMUNICATION, e.g. TELEVISION
19Methods or arrangements for coding, decoding, compressing or decompressing digital video signals
10using adaptive coding
134characterised by the element, parameter or criterion affecting or controlling the adaptive coding
136Incoming video signal characteristics or properties
14Coding unit complexity, e.g. amount of activity or edge presence estimation
H04N 19/157
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
NPICTORIAL COMMUNICATION, e.g. TELEVISION
19Methods or arrangements for coding, decoding, compressing or decompressing digital video signals
10using adaptive coding
134characterised by the element, parameter or criterion affecting or controlling the adaptive coding
157Assigned coding mode, i.e. the coding mode being predefined or preselected to be further used for selection of another element or parameter
H04N 19/176
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
NPICTORIAL COMMUNICATION, e.g. TELEVISION
19Methods or arrangements for coding, decoding, compressing or decompressing digital video signals
10using adaptive coding
169characterised 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
17the unit being an image region, e.g. an object
176the region being a block, e.g. a macroblock
H04N 19/19
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
NPICTORIAL COMMUNICATION, e.g. TELEVISION
19Methods or arrangements for coding, decoding, compressing or decompressing digital video signals
10using adaptive coding
189characterised by the adaptation method, adaptation tool or adaptation type used for the adaptive coding
19using optimisation based on Lagrange multipliers
Applicants
  • ソニー株式会社 SONY CORPORATION [JP]/[JP] (AllExceptUS)
  • 森上 義崇 MORIGAMI Yoshitaka [JP]/[JP] (UsOnly)
  • 佐藤 数史 SATO Kazushi [JP]/[JP] (UsOnly)
Inventors
  • 森上 義崇 MORIGAMI Yoshitaka
  • 佐藤 数史 SATO Kazushi
Agents
  • 稲本 義雄 INAMOTO Yoshio
Priority Data
2010-27642610.12.2010JP
2011-05455611.03.2011JP
Publication Language Japanese (JA)
Filing Language Japanese (JA)
Designated States
Title
(EN) ENCODING APPARATUS AND ENCODING METHOD, AND DECODING APPARATUS AND DECODING METHOD
(FR) APPAREIL DE CODAGE ET PROCÉDÉ DE CODAGE, ET APPAREIL DE DÉCODAGE ET PROCÉDÉ DE DÉCODAGE
(JA) 符号化装置および符号化方法、並びに復号装置および復号方法
Abstract
(EN)
The technology of the present invention is related to an encoding apparatus and an encoding method, and a decoding apparatus and a decoding method, wherein encoding efficiency upon conducting Edge Based Prediction can be improved. An edge detection unit detects an angle (θ) of an edge of an adjacent block of a reference image, among the images to be subjected to encoding, that is adjacent to a prediction block that is a block to be subjected to inter-prediction. A prediction image generating unit generates a prediction image of the prediction block, from the adjacent block, on the basis of the angle (θ). A calculation unit subtracts the prediction image of that prediction block, from the prediction block. An orthogonal transformation unit conducts an MDDT of residual information to be obtained as a result of the subtraction, using a filter coefficient corresponding to the angle (θ). This technology can be applied to an encoding apparatus, for example.
(FR)
La technologie de la présente invention est apparentée à un appareil de codage et à un procédé de codage, ainsi qu'à un appareil de décodage et à un procédé de décodage, l'efficacité de codage lors de la conduite d'une prédiction basée sur le bord pouvant être améliorée. Une unité de détection de bord détecte un angle (Ө) d'un bord d'un bloc adjacent d'une image de référence, parmi les images devant être soumises à un codage, qui est adjacent à un bloc de prédiction qui est un bloc devant être soumis à une prédiction inter. Une unité de génération d'image de prédiction génère une image de prédiction du bloc de prédiction, à partir du bloc adjacent, sur la base de l'angle (Ө). Une unité de calcul soustrait l'image de prédiction de ce bloc de prédiction, à partir du bloc de prédiction. Une unité de transformation orthogonale conduit un MDDT d'informations résiduelles devant être obtenues en tant que résultat de la soustraction, à l'aide d'un coefficient de filtre correspondant à l'angle (Ө). Cette technologie peut être appliquée à un appareil de codage, par exemple.
(JA)
本技術は、Edge based predictionを行う場合の符号化効率を向上させることができる符号化装置および符号化方法、並びに復号装置および復号方法に関する。 エッジ検出部は、符号化対象の画像のうちのイントラ予測の対象となるブロックである予測ブロックに隣接する参照画像の隣接ブロックのエッジの角度θを検出する。予測画像生成部は、角度θに基づいて、隣接ブロックから予測ブロックの予測画像を生成する。演算部は、予測ブロックから、その予測ブロックの予測画像を減算する。直交変換部は、角度θに対応するフィルタ係数を用いて、減算の結果得られる残差情報をMDDTする。本技術は、例えば、符号化装置に適用することができる。
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