Systems and methods for enhanced coding gain

H - Electricity – 04 – N

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H04N 11/04 (2006.01)

Patent

CA 2624674

Additional data compression is achieved by enhancing the spatial and temporal correlation of the data in a pre-processing module prior to sending the data to an encoding algorithm, such as for example, the MPEG algorithm. An input frame of data is decomposed into a luminance frame and two chrominance frames. The luminance frame is transformed on the basis of each of a plurality of luminance pixels within the frame to produce a transformed luminance frame having a plurality of transformed luminance pixels. A map describing a relationship between the plurality of luminance pixels of the luminance frame and the plurality of transformed luminance pixels of the transformed luminance frame is created. The two chrominance frames are transformed according to the map to produce two transformed chrominance frames. The transformed luminance frame and the two transformed chrominance frames are integrated to produce a transformed output frame.

Une compression de données supplémentaire est obtenue en améliorant la corrélation spatiale et temporelle des données dans un module de prétraitement avant de transmettre les données à un algorithme de codage, tel que, par exemple, l~algorithme MPEG. Une trame d~entrée de données est décomposée en une trame de luminance et deux trames de chrominance. La trame de luminance est transformée sur la base de chacun des pixels de luminance d~une pluralité au sein de la trame pour produire une trame de luminance transformée ayant une pluralité de pixels de luminance transformée. Une carte décrivant la relation entre la pluralité de pixels de luminance de la trame de luminance et la pluralité de pixels de luminance transformée de la trame de luminance transformée est créée. Les deux trames de chrominance sont transformées en fonction de la carte pour produire deux trames de chrominance transformées. La trame de luminance transformée et les deux trames de chrominance transformées sont intégrées pour produire une trame de sortie transformée.

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