Patent Number: 7,089,179

Title: Voice coding method, voice coding apparatus, and voice decoding apparatus

Abstract: A gain unit scales a code vector Ci output from a configuration variable code book by a gain g after the positions of non-zero samples are controlled according to an index and transmission parameter p. A linear prediction synthesis filter input the multiplication result, and outputs a regenerated signal gACi. A subtracter outputs an error signal E by subtracting the regenerated signal gACi from an input signal X. A error power evaluation unit computes an error power according to an error signal E. The above described processes are performed on all code vectors Ci and gains g. The index i of the code vector Ci and the gain g with which the error power is the smallest are computed and transmitted to the decoder.

Inventors: Ota; Yasuji (Kanagawa, JP), Suzuki; Masanao (Kanagawa, JP), Tsuchinaga; Yoshiteru (Fukuoka, JP)

Assignee: Fujitsu Limited

International Classification: G10L 19/00 (20060101)

Expiration Date: 8/08/02018