AUDIO SIGNAL ENCODING METHOD

摘要

PROBLEM TO BE SOLVED: To solve the problem that sound quality becomes worse since spectrum data of a plurality of time blocks of an audio signal are not properly grouped when the spectrum data are grouped and encoded with high efficiency. SOLUTION: A method includes a step (103) for calculating an integrated group spectrum variation index showing the maximum or mean of variation of spectrum data between time blocks belonging to a group obtained by integrating adjacent groups, a step (104) for calculating the minimum value of the integrated group spectrum variation index in the integration of all adjacent groups, and a step (106) for integrating the group minimizing the integrated group spectrum variation index when the minimum value is equal to or less than a 1st threshold.