DATA STRUCTURE OF COMPRESSED DATA, RECORDING MEDIUM, DATA COMPRESSION APPARATUS, DATA COMPRESSION SYSTEM, DATA COMPRESSION PROGRAM, AND DATA COMPRESSION METHOD

摘要

PROBLEM TO BE SOLVED: To provide a data compression technique capable of improving a compression ratio.SOLUTION: An example of compressed data generated by a data compression/expansion apparatus is a frame including a frame header and a plurality of variable length blocks. Each of the plurality of blocks has a block header and a data part. The data part stores a plurality of pieces of compressed sample data. The sample data is frequency domain data obtained by sampling and applying predetermined conversion to an audio signal of a predetermined period. The frame header has a record of information common to the plurality of block headers, and the information determines the size of a predetermined area of each block header. The predetermined area of the block header has a record of the number of pieces of data included in the block.