Patent ID: 8711012
Filing Date: 2014-04-29
Classification: G10L,H03M

Abstract:
1. An encoding method comprising: a vector quantization step of vector-quantizing a plurality of samples collectively to obtain a vector quantization index and the quantized value of each of the plurality of samples; a bit assignment step of assigning bits in a predetermined order of priority based on auditory perceptual characteristics to one or more sets of sample positions among a plurality of sets of sample positions, each set comprising a plurality of sample positions and being given an order of priority based on the auditory perceptual characteristics, the number of bits not being larger than the number of bits obtained by subtracting the number of bits used for a code corresponding to the vector quantization index from the number of bits assigned for the code corresponding to the vector quantization index; and a coefficient group selection step of outputting index information indicating a group of coefficients that minimizes the sum of the error between the value of each sample included in each of the sets of sample positions to which the bits are assigned in the bit assignment step and the value obtained by multiplying the quantized value of each sample included in the set of sample positions by a coefficient corresponding to the position of the sample, of all the sample positions included in the set of sample positions, among a plurality of groups of predetermined coefficients corresponding to the positions of the samples.