H - Electricity – 04 – N
Patent
H - Electricity
04
N
H04N 7/26 (2006.01) G06T 9/00 (2006.01) G06T 9/20 (2006.01) H04N 1/41 (2006.01)
Patent
CA 2164627
A video signal coding method and apparatus thereof and a video signal decoding apparatus of the present invention improves visual picture quality of a decoded image with higher compression rate than ever. A video signal (S1) is resolved into local luminance information composed of the smooth component, edge information composed of contour component, and texture information composed of component other than the smooth component and the contour component corresponding to each different visual importance. Then, the local luminance information is coded (S2) by a coding method which restores all of the local luminance information, the edge information is coded (S4) by a coding method by chain information and amplitude information, and the texture information is coded by a coding method having higher compression rate compared with the local luminance information (S2) and the edge information (S4). The coding can therefore be performed with higher compression rate than ever and in consideration of the visual picture quality of the restored image.
L'invention porte sur une qualité d'image obtenue par une technique de compression à un taux supérieur aux normes usuelles. Les signaux d'images (S1) sont séparés: en signaux locaux de luminance composés d'éléments de lissage, en signaux de bord composés d'éléments de contour, et en signaux de texture composés d'éléments différents des deux précédents en fonction de leur importance visuelle. Les signaux locaux de luminance sont codés (S2) à l'aide d'un procédé de codage préservant la totalité du signal. Les signaux de bord sont codés (S4) à l'aide de signaux de chaîne et d'amplitude. Les signaux de texture sont codés avec un taux de compression supérieur à celui des signaux de luminance locaux (S2), et des signaux de bord (S4).
Gowling Lafleur Henderson Llp
Sony Corporation
LandOfFree
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