High efficiency coding method and apparatus.

摘要

A high efficiency coding method and apparatus including carrying out quantization taking account of correlation of input signals of plural channels in compressing and/or expanding the input signals of the respective channels simultaneously. In the high efficiency coding method and apparatus, spectrum data from MDCT circuits or coefficient data are transmitted to another channel via an other-channel transmission circuit, and data from another channel are transmitted to correlation adaption circuits. The data from correlation adaption circuits are transmitted to adaptive bit allocation circuits, respectively, wherein bit allocation in coding taking account of input signals of another channel is carried out.