SIGNAL RECORDING/REPRODUCTION METHOD, CODE STRING GENERATION METHOD, AND PROGRAM

摘要

For example, for narrow-band reproduction for preview-listening, the number of coding units UN is set to 4, and the quantization accuracy information QN and the normalization coefficient information NP are coded for four. In spectrum coefficient information SP, a region Neg after the four coding units is ignored during preview-listening even if all the band is coded. In the region Neg, quantization accuracy information QN' of higher band side and the normalization coefficient information NP' which have not been coded in the normal position are encoded. In the region Neg, a frame having quantization accuracy information QN' and normalization coefficient information NP' embedded and a frame having none of them are provided, so that safety is further improved while maintaining a small high-quality file data amount.