CODING EQUIPMENT

摘要

A correct chirp factor and noise component quantity are calculated by a small processing quantity. An inputted sub-band signal is divided into a plurality of areas by an area dividing part (101). The area dividing is performed respectively for energy value calculation, chirp factor calculation, noise component calculation and tone component calculation, and determined area dividing information (ei, bi, qi, hi) is outputted. Processes of the energy calculation, chirp factor calculation, tone component calculation and the noise component calculation are sequentially performed for areas corresponding to processes. By using a linear prediction process, highly accurate parameters can be obtained by the small calculation quantity.