Data compression apparatus, computer-readable storage medium having stored therein data compression program, data compression system, data compression method, data decompression apparatus, data compression/decompression apparatus, and data structure of compressed data

摘要

A data compression/decompression apparatus, for example, acquires sampling data obtained by sampling an audio signal with a predetermined period, and converts the sampling data into frequency domain data. The data compression/decompression apparatus divides a data sequence of the converted frequency domain data into a plurality of blocks such that the number of pieces of data included in each block is variable, and compresses each block.