SIGNAL ENCODING DEVICE AND SIGNAL DECODING DEVICE, AND COMPUTER-READABLE RECORDING MEDIUM WITH RECORDED SIGNAL ENCODING PROGRAM AND COMPUTER-READABLE RECORDING MEDIUM WITH RECORDED SIGNAL DECODING PROGRAM

摘要

PROBLEM TO BE SOLVED: To solve the problem that it is difficult for a conventional encoding and decoding device for an acoustic signal, etc., to meet requirements of compressibility, quality, and an arithmetic quantity at high level. SOLUTION: High compressibility and high quality are secured with a high arithmetic quantity by determining the number of allocation bits allocated to each frequency component according to the spectrum envelope of the frequency spectrum of an object signal and encoding the frequency spectrum quantized corresponding to the number of allocation bits and the spectrum envelope.