SCALABLE VIDEO CODING USING INTER-LAYER PREDICTION CONTRIBUTION TO ENHANCEMENT LAYER PREDICTION

摘要

A scalable video decoder is described which is configured to reconstruct a base layer signal from a coded data stream to obtain a reconstructed base layer signal; and reconstruct an enhancement layer signal comprising spatially or temporally predicting a portion of an enhancement layer signal (360), currently to be reconstructed, from an already reconstructed portion of the enhancement layer signal to obtain an enhancement layer internal prediction signal (34); forming (41), at the portion (28) currently to be reconstructed, a weighted average of an inter-layer prediction signal (39) obtained from the reconstructed base layer signal (200), and the enhancement layer internal prediction signal to obtain an enhancement layer prediction signal (42) such that a weighting between the inter-layer prediction signal and the enhancement layer internal prediction signal varies over different spatial frequency components; and predictively reconstructing (52) the enhancement layer signal using the enhancement layer prediction signal.