METHOD AND APPARATUS FOR SPATIALLY SCALABLE VIDEO COMPRESSION AND TRANSMISSION

摘要

A method and apparatus provide the ability to resample video frame into various resolutions, and to predict, quantize, and entropy code the video signal for spatially scalable compression and networking applications. The solution involves a unified re-sampling and estimation-theoretic prediction, quantization, and entropy coding framework, which by design is tailored to allow base layer coding information to be fully accessible and usable by enhancement layers; and for the enhancement layer to account for all available information from both layers for superior compression performance. Specialization may include specific techniques for coding and networking scenarios, where the potential of the unified resampling and estimation-theoretic framework is realized to considerably improve the overall system performance over existing schemes.

主权项

1. An apparatus for processing a video data stream, comprising:
a codec for processing a video data stream comprised of a plurality of frames, wherein the codec comprises an encoder, a decoder, or both an encoder and a decoder; the encoder processes a video data stream to generate encoded data and the decoder processes encoded data to reconstruct a video data stream; the encoded data is comprised of a base layer of lower spatial resolution and at least one enhancement layer of higher spatial resolution as compared to the base layer; and the enhancement layer's processing comprises transform domain predictions, wherein predictions of one or more transform coefficients are made from the base layer's information on the transform coefficients in a current frame, and the enhancement layer's motion compensated information from one or more prior frames; wherein the base layer's information comprises bounds on the transform coefficients' values.