Modified entropy encoding for images and videos

H - Electricity – 04 – N

Patent

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H04N 7/50 (2006.01)

Patent

CA 2751803

A method and encoder for entropy encoding image data using a dynamically determined coding order, and a method and decoder for entropy decoding encoded data encoded using a dynamically determined coding order. The coding order for encoding quantized transform domain coefficients is dynamically determined for the image based on at least one characteristic of the quantized transform domain coefficients. The characteristic may be quantization step size if non-uniform quantization is employed for blocks of data.

L'invention concerne un procédé et un codeur pour le codage entropique de données d'images utilisant un ordre de codage déterminé dynamiquement, et un procédé et décodeur pour le décodage entropique de données codées, codées en utilisant un ordre de codage déterminé dynamiquement. L'ordre de codage pour coder des coefficients de domaine de transformée quantifiés est déterminé dynamiquement pour l'image sur la base d'au moins une caractéristique des coefficients de domaine de transformée quantifié. La caractéristique peut être la dimension de l'étape de quantification si une quantification non uniforme est employée pour les blocs de données.

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