Methods and systems for significance coefficient coding in...

H - Electricity – 04 – N

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H04N 7/30 (2006.01)

Patent

CA 2644912

A method for decoding significance coefficients in an encoded video sequence is described. An encoded video bitstream is received. Codebook table information is retrieved from the bitstream. Significance symbols are decoded using the retrieved codebook table information. Significance coefficients are decoded using the significance symbols. A plurality of transform coefficients is dequantized. An inverse transform is applied to a residual signal. A video sequence is constructed. A method for coding significance coefficients in a video sequence with a plurality of tables is also described.

L'invention porte sur un procédé de décodage de coefficients d'importance dans une séquence vidéo codée. Le procédé comprend la réception d'un flux binaire vidéo codé; l'extraction du flux binaire d'informations de la table du livre de codes; le décodage de symboles d'importance à l'aide des informations de la table du livre de codes extraites; le décodage de coefficients d'importance à l'aide des symboles d'importance; la déquantification d'une pluralité de coefficients de transformée; l'application à un signal résiduel d'une transformée inverse et la construction d'une séquence vidéo. L'invention porte également sur un procédé de codage de coefficients d'importance dans une séquence vidéo.

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