GRADUAL UPDATING USING TRANSFORM COEFFICIENTS FOR ENCODING AND DECODING

摘要

Innovations are provided for encoding and/or decoding video and/or image content using transform coefficient level gradual updating. Transform coefficient level gradual updating can be applied by encoding (or decoding) different subsets of the transform coefficients for the blocks, macroblocks, or other coding unit for each of a sequence of pictures. For example, a first subset of the transform coefficients of the blocks of a first picture can be encoded with the first picture, a second subset of the transform coefficients of the blocks of a second picture can be encoded with the second picture, and so on. A decoder can reconstruct pictures with increasing quality by receiving additional subsets of the transform coefficients.

主权项

1. A computing device comprising:
a processing unit; and memory; the computing device configured to perform operations for video encoding or image encoding, the operations comprising: encoding data for a picture, the encoding comprising, for each block of a plurality of blocks of the picture:
performing a frequency transform on data values of the block to produce a set of transform coefficients;selecting a subset of the set of transform coefficients based at least in part on a model of available bandwidth; andquantizing the subset of the set of transform coefficients; and outputting encoded data for the picture in a bitstream; wherein one or more different subsets of the set of transform coefficients are encoded in one or more subsequent pictures for each of a plurality of corresponding blocks in the one or more subsequent pictures.