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1. WO2020142605 - METHOD AND APPARATUS FOR IMPROVED ZERO OUT TRANSFORM

Publication Number WO/2020/142605
Publication Date 09.07.2020
International Application No. PCT/US2020/012049
International Filing Date 02.01.2020
IPC
H04N 19/159 2014.1
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
159Prediction type, e.g. intra-frame, inter-frame or bidirectional frame prediction
H04N 19/105 2014.1
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
105Selection 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
H04N 19/61 2014.1
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
NPICTORIAL COMMUNICATION, e.g. TELEVISION
19Methods or arrangements for coding, decoding, compressing or decompressing digital video signals
60using transform coding
61in combination with predictive coding
CPC
H04N 19/122
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
122Selection of transform size, e.g. 8x8 or 2x4x8 DCT; Selection of sub-band transforms of varying structure or type
H04N 19/136
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
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 19/44
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
NPICTORIAL COMMUNICATION, e.g. TELEVISION
19Methods or arrangements for coding, decoding, compressing or decompressing digital video signals
44Decoders specially adapted therefor, e.g. video decoders which are asymmetric with respect to the encoder
H04N 19/45
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
NPICTORIAL COMMUNICATION, e.g. TELEVISION
19Methods or arrangements for coding, decoding, compressing or decompressing digital video signals
44Decoders specially adapted therefor, e.g. video decoders which are asymmetric with respect to the encoder
45performing compensation of the inverse transform mismatch, e.g. Inverse Discrete Cosine Transform [IDCT] mismatch
H04N 19/547
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
NPICTORIAL COMMUNICATION, e.g. TELEVISION
19Methods or arrangements for coding, decoding, compressing or decompressing digital video signals
50using predictive coding
503involving temporal prediction
51Motion estimation or motion compensation
547Motion estimation performed in a transform domain
Applicants
  • TENCENT AMERICA LLC [US]/[US]
Inventors
  • ZHAO, Xin
  • LI, Xiang
  • LIU, Shan
Agents
  • MA, Johnny
  • MASON, J. Derek
Priority Data
16/731,51431.12.2019US
62/704,04302.01.2019US
Publication Language English (EN)
Filing Language English (EN)
Designated States
Title
(EN) METHOD AND APPARATUS FOR IMPROVED ZERO OUT TRANSFORM
(FR) MÉTHODE ET APPAREIL POUR AMÉLIORER LA TRANSFORMÉE DE MISE À ZÉRO
Abstract
(EN)
A method of video decoding includes receiving a coded video bitstream including a current picture. The method further includes performing, to generate a prediction block, an optimized inverse transform process on a transform block that corresponds to a current block included in the current picture based on one of (i) a transform property of the inverse transform process and (ii) a block size of the transform block. The method further includes reconstructing the current block using the predicted block.
(FR)
L'invention concerne un procédé de décodage vidéo comprenant la réception d'un flux binaire vidéo codé qui contient une image actuelle. Le procédé comprend en outre la réalisation, pour générer un bloc de prédiction, d'un processus de transformée inverse optimisée sur un bloc de transformée qui correspond à un bloc actuel inclus dans l'image actuelle en se basant sur (i) une propriété de transformée du processus de transformée inverse, ou (ii) une taille de bloc du bloc de transformée. Le procédé comprend en outre la reconstruction du bloc actuel en utilisant le bloc prédit.
Also published as
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