| 摘要 |
PROBLEM TO BE SOLVED: To provide a decoder, a decoding method and a program, by which encoding efficiency can be improved by constraining an appearance probability of a predetermined quantization value of an encoding target to 0 when encoding with a combination of Huffman encoding and multidimensional encoding is performed.SOLUTION: In a decoding method, a quantization value Q3 of a normalized spectrum NS, an appearance probability of a predetermined quantization value of which is constrained to 0, is decoded, the quantization value Q being encoded on the basis of a code book CB3 in which a variable length code longer in code length as the appearance probability decreases is allocated with respect to each of a plurality of quantization values other than the predetermined quantization value of a time signal for learning corresponding to a time signal T, the appearance probability of the predetermined quantization value of the time signal for learning being constrained to 0. The present technique can be applied for, for example, a decoder.SELECTED DRAWING: Figure 18 |
