Adaptive quantization within the jpeg sequential mode

Details Adaptive quantization within the jpeg sequential mode Adaptive quantization within the jpeg sequential mode

H - Electricity

04

N

H04N 7/12 (2006.01) G06T 9/00 (2006.01) H04N 1/41 (2006.01) H04N 7/26 (2006.01) H04N 7/30 (2006.01) H04N 7/34 (2006.01)

Patent

CA 2062155

A system and method for masking adaptive quantization during compressed image data transmission by defining a scaling factor for the quantization tables of the multiple image components, wherein the scaling factor signals changes in quantization for successive blocks of the image data. The scaling factor is transmitted as a further component together with the image components to thereby signal adaptive quantization of the image data.

Un système et une méthode de masquage de la quantification adaptative durant une transmission de données d'image compressées qui exploite un facteur d'échelle pour les tables de quantification des composantes de l'image multiples, où les signaux du facteur d'échelle changent durant la quantification des blocs successifs de données d'image. Le facteur d'échelle est transmis comme composante supplémentaire en même temps que les composantes de l'image pour servir à la quantification adaptative du signal des données d'image.

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