G - Physics – 10 – L
Patent
G - Physics
10
L
G10L 19/12 (2006.01) G10L 11/06 (2006.01) G10L 19/00 (2006.01)
Patent
CA 2061457
A speech signal coding apparatus comprising: a periodic excitation signal source; a non-periodic excitation signal source; a synthesizing unit for synthesizing a periodic excitation signal and a non- periodic excitation signal output from the above sources to generate an excitation sound source signal; a filter for regenerating an input speech signal from the excitation sound source signal; and an error evaluating unit for controlling the periodic excitation signal source and the non-periodic excitation signal source so that these units output periodic and non-periodic excitation signals which minimizes a difference of the regenerated signal from an input speech signal. The above excitation sound source when the error is minimized is supplied to a feedback excitation signal modifying unit, which reduces a non-periodic component in the above supplied signal according to a relative amount of the non-periodic component in the supplied signal so that the non-periodic component is reduced more when the relative amount of the periodic component is greater. The modified signal is fed back to the periodic excitation signal source unit 1 to modify the content thereof.
Kurihara Hideaki
Ohta Yasuji
Sakai Yoshihiro
Tanaka Yoshinori
Taniguchi Tomohiko
Fujitsu Limited
Mcfadden Fincham
LandOfFree
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