| 摘要 |
PROBLEM TO BE SOLVED: To provide a device and a method for speech encoding that can improve transmission efficiency by suppressing deterioration in reproduced speech quality as much as possible although a conventional bit rate decreasing method has a problem in which reproduced speech density deteriorates. SOLUTION: Provided are the device and method for speech encoding that provides a plurality of divided candidate position tables by dividing pulse candidate positions in a group of candidate position tables into a plurality of parts for an algebraic code book search for a combinations of pulse positions each in the group with the smallest distortion based upon the candidate position table wherein a sound source signal of an input speech signal is represented with a combination of pulses and candidate positions of pulses are grouped and determined by groups, search for the combination of pulse positions each in the group with the smallest distortion in each divided candidate position table, and selects the combination of pulses of divided candidate tables having the smallest distortion. COPYRIGHT: (C)2004,JPO
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