Video encoding method enabling highly efficient partial decoding of H.264 and other transform coded information

摘要

Methods and apparatus to process multimedia data enabling efficient partial decoding of transform coded data are described. A decoder device receives transform coefficients, where the transform coefficients are associated with multimedia data. The decoder device determines a set of multimedia samples to be reconstructed. In one aspect, the set of samples to be reconstructed is a subset of a matrix of transformed multimedia samples. The decoder device determines a set of transform coefficients to be used to reconstruct the multimedia samples. In one aspect, the transform coefficients are used to scale partial basis images associated with the encoding method used to generate the transform coefficients, resulting in reconstructed multimedia samples.

主权项

1. A method of processing multimedia data in at least one processor, comprising:
receiving transform coefficients, wherein the transform coefficients are associated with the multimedia data; determining a set of multimedia samples to be reconstructed, based on at least one identified portion of lost multimedia data; determining a set of the received transform coefficients based on the multimedia samples to be reconstructed; processing, by a pre-processor, the determined set of transform coefficients to generate reconstructed samples corresponding to the determined set of multimedia samples, wherein the processing comprises:
partitioning the determined set of transform coefficients into a plurality of groups;calculating a weight value for each of the plurality of groups, wherein the calculation is based on the encoding method which generated the transform coefficients;determining an array for each of the plurality of groups based on the encoding method which generated the transform coefficients; andgenerating the reconstructed samples of the multimedia data based on the weight values and the arrays; estimating a set of concealment multimedia samples for the portion of multimedia data that has been lost based on the reconstructed samples; communicating the concealment multimedia samples and originally encoded non-causal multimedia data to a video core processor; and decoding, by the video core processor, the concealment multimedia samples and the originally encoded non-causal multimedia data.