Multichannel signal coding using weighted vector quantization.

摘要

Disclosed are coding and decoding methods and related coders and decoders, wherein signal components of plural channels are weighted-vector quantized as a single vector produced by combining them together with weights corresponding to their power components. The invention permits production of the quantization distortion through utilization of imbalance of power between signals of the channels without involving the adaptive bit allocation. Besides, by splitting a signal of one channel into a plurality of subchannels, power imbalance in the direction of the time axis is also effectively utilized to reduce the quantization distortion which permits implementation of high efficiency coding and decoding.