| 摘要 |
PROBLEM TO BE SOLVED: To increase the efficiency of information amount compression of auxiliary information used for encoding. SOLUTION: A processing section determination part 5 sets a plurality of processing sections on a frequency axis in the encoding of a conversion coefficient so that the sections are less than prescribed minimum unit sections, and an optimum encoding processing part 3 encodes the conversion coefficient calculated by an orthogonal conversion part 1 by the processing sections set by the determination part 5 according to an index for adaptively controlling the generation amount of quantization noise calculated by an auditory analysis part 2 and outputs the encoded conversion coefficient and the attached auxiliary information having been used for the encoding. |
