G - Physics – 10 – L
Patent
G - Physics
10
L
354/46
G10L 19/12 (2006.01) G10L 11/06 (2006.01) G10L 19/00 (2006.01)
Patent
CA 2019801
SYSTEM FOR SPEECH CODING AND AN APPARATUS FOR THE SAME ABSTRACT OF THE DISCLOSURE A CELP type of speech signal coding system, wherein a code vector obtained by applying linear prediction to a vector of a residual speech signal of white noise stored in a code book and a pitch prediction vector obtained by applying linear prediction to a residual signal of a preceding frame given a delay corresponding to a pitch frequency are added, use is made of an impulse vector obtained by applying linear prediction to a residual signal vector of impulses having a predetermined relationship with the vectors of the white noise code book, variable gains are given to at least the above code vector and impulse vector, a reproduced signal is produced, and this reproduced signal is used for identification of the input speech signal, thus enabling the creation of a pulse series corresponding to the sound source of voiced speech sounds, enabling accurate evaluation and identification of a pulse-like sound source of voiced speech sounds, not possible in the past, and enabling improvement of the quality of the reproduced speech while reducing the amount of information transmitted.
Amano Fumio
Ohta Yasuji
Sasama Akira
Tanaka Yoshinori
Taniguchi Tomohiko
Fujitsu Limited
Mcfadden Fincham
LandOfFree
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