Multiscale coding of images
First Claim
1. A method of encoding an image, the image including a plurality of frames defined by a set of chrominance and luminance values, the method comprising the steps ofrecursively decomposing, to at least two levels of recursion, the luminance values of sequential frames into spatio-temporal spectral components, said spatio-temporal spectral components including a plurality of spatial components and a plurality of temporal components,said decomposing step including the steps ofquadrature mirror filtering signals representative of said luminance values andsubsampling said filtered signals, andcoding each recursively decomposed level of at least one of said spectral components by vector quantization.
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Abstract
Image encoding apparatus and methods include recursively decomposing the luminance values of sequential frames into spatio-temporal spectral components, by quadrature mirror filter (QMF) processing of the luminance values. The filtered signals are subsampled, and each decomposed level of the spectral components is coded by vector quantization.
177 Citations
20 Claims
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1. A method of encoding an image, the image including a plurality of frames defined by a set of chrominance and luminance values, the method comprising the steps of
recursively decomposing, to at least two levels of recursion, the luminance values of sequential frames into spatio-temporal spectral components, said spatio-temporal spectral components including a plurality of spatial components and a plurality of temporal components, said decomposing step including the steps of quadrature mirror filtering signals representative of said luminance values and subsampling said filtered signals, and coding each recursively decomposed level of at least one of said spectral components by vector quantization.
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19. Apparatus for encoding an image, the image including a plurality of frames defined by a set of chrominance and luminance values, the apparatus comprising
decomposing means for recursively decomposing, to at least two levels of recursion, the luminance values of sequential frames into spatio-temporal spectral components, said spatio-temporal spectral components including a plurality of spatial components and a plurality of temporal components, said decomposing means including quadrature mirror filter means for filtering signals representative of said luminance values and subsampling means for subsampling said filtered signals, and vector quantization means for coding each recursively decomposed level of at least one of said spectral components by vector quantization.
Specification