AUDIO HIGH-EFFICIENCY ENCODER, AUDIO HIGH-EFFICIENCY ENCODING METHOD, AUDIO HIGH-EFFICIENCY ENCODING PROGRAM, AND RECORDING MEDIUM THEREFOR

摘要

PROBLEM TO BE SOLVED: To realize an audio encoding method having improved encoding efficiency, which obtains the same decoding result as the conventional, with the smaller number of bits.;SOLUTION: Zero detection parts 151 and 152 and a data permutation part 160 are provided, in the coding method for expressing spectral data by the unit of band, with a scale factor showing the gain and quantized spectral data. The zero detection parts 151 and 152 detect that all of the quantized spectral data in the band are zero. The data permutation part 160 replaces the value of at least one of a scale factor, an intensity stereo position showing the directional gain of one channel with respect to that of the other channel of the intensity stereo processing, a code book number, and a flag regarding the stereo processing, with another value, on the basis of the detection result.;COPYRIGHT: (C)2004,JPO&NCIPI