Patent Document ID: 20110316732
Application ID: 13148892
Patent Status: 0

Claim One:
1. A vector quantization apparatus comprising: a first selection section that selects a classification code vector indicating a type of characteristics having a correlation with a vector to be quantized from among a plurality of classification code vectors; a second selection section that selects a first codebook corresponding to the selected classification code vector from among a plurality of first codebooks; a first quantization section that quantizes the vector to be quantized using a plurality of first code vectors making up the selected first codebook, to obtain a first code; a third selection section that selects a first matrix corresponding to the selected classification code vector from among a plurality of matrices; and a second quantization section that quantizes a first residual vector which is a difference between the first code vector indicated by the first code and the vector to be quantized using a plurality of second code vectors and the selected first matrix, to obtain a second code.