Audio coder

申请公布号：

US7072830(B2)

申请号：

US20050185302

申请日期：

2005.07.20

申请公布日期：

2006.07.04

申请人：

FUJITSU LIMITED

发明人：

SASAKI HITOSHI;OTA YASUJI

分类号：

G10L19/04;G10L19/02;H03M7/38

主分类号：

G10L19/04

摘要：

An audio coder that improves audio quality by reducing a quantization error. When a code corresponding to a sampled value of an audio signal is determined, a candidate code storage section stores all combinations of candidate codes in a neighborhood interval of the sampled value. A local decoder generates reproduced signals by decoding the codes stored in the candidate code storage section. An error evaluation section calculates, for each candidate code, a sum of squares of differentials between input sampled values and reproduced signals, detects a combination of candidate codes by which a smallest sum is obtained, that is to say, which minimizes a quantization error, and outputs a code included in the detected combination of candidate codes.