Method, coder and decoder, and programs for coding and decoding speech parameters, and method, coder and decoder, and programs for coding and decoding speech

摘要

In vector coding and decoding of LSP parameters of moving average type speech, it is structured that a vector of a spectrum corresponding to a stationary noise interval, or, further, a vector from which a mean vector found in advance is subtracted, is stored as one vector C0 in a vector codebook 14A, so that a spectrum corresponding to a silent interval or stationary noise can be outputted as one of code vectors.