SOUND SIGNAL ENCODING DEVICE, SOUND SIGNAL DECODING DEVICE, TERMINAL DEVICE, BASE STATION DEVICE, SOUND SIGNAL ENCODING METHOD AND DECODING METHOD

摘要

The purpose of the present invention is to achieve an efficient vector quantization for AVQ encoding. A sound signal encoding device (100) comprises: a subband classification unit (105) for classifying subbands formed by dividing a frequency domain spectrum into a plurality of aurally significant first category subbands and second category subbands besides the first category subbands on the basis of at least one index of either energy or peak ; an SBP-AVQ vector generation unit (106) for generating and outputting an SBP-AVQ vector by collecting the maximum peaks from each of the first category sub-bands, while outputting the peak position information of the maximum peaks; a bit distribution unit (104) for distributing bits for the AVQ encoding to the SBP-AVQ vector and the vector of the second category sub-bands; and an AVQ encoding unit (107) for AVQ encoding the SBP-AVQ vector and the vector of the second category subbands.