SCALABLE VIDEO CODING USING BASE-LAYER HINTS FOR ENHANCEMENT LAYER MOTION PARAMETERS

摘要

Information available from coding/decoding the base layer, i.e. base-layer hints, is exploited to render the motion-compensated prediction of the enhancement layer more efficient by more efficiently coding the enhancement layer motion parameters.

主权项

1. Scalable video decoder configured to
decode base layer motion parameters from a coded data stream, decode a base layer residual signal of a base layer signal from a coded data stream, reconstruct an enhancement layer signal comprising
gathering, for a block of a frame of the enhancement layer signal, a set of motion parameter candidates from neighboring already reconstructed blocks of the frame;gathering a set of one or more base layer motion parameters of a block of the base layer signal, collocated to the block of the frame of the enhancement layer signaladding the set of one or more base layer motion parameters or a scaled version thereof to the set of enhancement layer motion parameter candidates so as to acquire an extended motion parameter candidate set for the enhancement layer,selecting one of the motion parameter candidates of the extended motion parameter candidate set,predicting, by motion compensated prediction, the enhancement layer signal using the selected one of the motion parameter candidates of the extended motion parameter candidate set, anddecoding a syntax element relating to a transform coefficient block of an enhancement layer residual signal from the coded data stream using a context model or a predictor which depends on the base layer residual signal or the base layer signal.