LOSSY DATA COMPRESSION WITH CONDITIONAL RECONSTRUCTION REFINEMENT

摘要

Methods of encoding and decoding media, for example video, using conditional reconstruction refinement are described. The encoding and decoding relies upon predictions that are based on previously encoded and decoded samples. Prediction information identifies the previously reconstructed samples upon which a prediction is to be based and is available to both the encoder and decoder. On the basis that a previously-reconstructed sample is going to be used as source data for a prediction, the encoder refines that reconstructed sample, uses the refined reconstructed sample for the prediction, and encodes refinement data to enable the decoder to also refine the previously-reconstructed sample during decoding. In some cases, a reconstructed sample may be refined more than once. Various flags or bits may be used to signal when refinement is enabled or disabled and may be signaled at various hierarchical points in the coding structure.

主权项

1. A method of decoding data from a bitstream of encoded data using a decoder, the method comprising:
decoding residual data for a first set of samples and reconstructing the first set of samples to produce a set of reconstructed samples; decoding prediction information for a second set of samples; and, determining that the prediction information specifies a prediction operation involving one of the reconstructed samples from the set of reconstructed samples, and, based on that determination,
decoding refinement data for that reconstructed sample, andmodifying that reconstructed sample using the refinement data to produce a refined reconstructed sample.