Patent ID: 7853088
Filing Date: 2010-12-14
Classification: H04N

Abstract:
1. A layered coding apparatus for encoding an input video signal at a plurality of coding layers exhibiting different spatial resolutions comprising: a decoder to decode a given signal coded at a lower coding layer lower than a specific coding layer among the plurality of coding layers, thus generating a decoded signal of the lower coding layer; a spatial interpolator to apply spatial interpolation to the decoded signal of the lower coding layer, thus generating an upscaled decoded video signal, the spatial interpolation being an upscaling procedure to upscale the decoded signal of the lower coding layer into a spatial resolution of the specific coding layer; a spatial high-frequency components estimator and upscaler to apply a spatial high-frequency components estimation and scale up procedure to the decoded signal of the lower coding layer, thus generating a high-frequency components signal; and an encoder to subtract the upscaled decoded video signal and the high-frequency components signal from the input video signal exhibiting a spatial resolution of the specific coding layer to produce a predictive-error signal, and encode the predictive-error signal at the specific coding layer, thus generating an output bitstream, wherein the decoder, the spatial interpolator, the spatial high-frequency components estimator and upscaler, and the encoder function at, at least, the specific coding layer among the plurality of coding layers except the lowest coding layer exhibiting the lowest spatial resolution thereamong.