Data processing: speech signal processing – linguistics – language – Speech signal processing – For storage or transmission
Patent
1996-08-22
1999-06-22
Hudspeth, David R.
Data processing: speech signal processing, linguistics, language
Speech signal processing
For storage or transmission
704226, 704233, G01L 500
Patent
active
059152346
ABSTRACT:
For the CELP (Code Excited Linear Prediction) coding of an input audio signal, an autocorrelation matrix, a speech
oise decision signal and a vocal tract prediction coefficient are fed to an adjusting section. In response, the adjusting section computes a new autocorrelation matrix based on the combination of the autocorrelation matrix of the current frame and that of a past period determined to be a noise. The new autocorrelation matrix is fed to an LPC (Linear Prediction Coding) analyzing section. The analyzing section computes a vocal tract prediction coefficient based on the autocorrelation matrix and delivers it to a prediction gain computing section. At the same time, in response to the above new autocorrelation matrix, the analyzing section computes an optimal vocal tract prediction coefficient by correcting the vocal tract prediction coefficient. The optimal vocal tract prediction coefficient is fed to a synthesis filter.
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Abebe Daniel
Hudspeth David R.
OKI Electric Industry Co., Ltd.
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