Fine-grain scalable video decoder with conditional replacement

Abstract

A fine-grain scalable (FGS) encoder, decoder, and corresponding methods are disclosed which utilize conditional replacement for selecting between a base layer prediction and an enhancement layer prediction. Processes include: encoding data as a plurality of discrete cosine transform (“DCT”) coefficients for each of a base layer and an enhancement layer, a first conditional replacement (“CR”) portion in signal communication with the encoder for selecting between a base layer prediction and enhancement layer prediction for each DCT coefficient of the enhancement layer to increase coding efficiency, receiving encoded DCT data from encoder, decoding the encoded DCT data to produce reconstructed data responsive to the selected prediction, and a second CR portion in signal communication with the decoder for selecting between the base layer prediction and the enhancement layer prediction for each DCT coefficient of the enhancement layer to reduce prediction drift.

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