Digital speech processing using linear prediction process

Details Digital speech processing using linear prediction process Digital speech processing using linear prediction process

G - Physics

10

L

354/50

G10L 19/06 (2006.01) G10L 11/06 (2006.01)

Patent

CA 1184657

ABSTRACT A speech signal is divided into sections after digitizing and each section is analyzed by the methods of linear prediction to determine the coeffic- ients of a sound formation model filter, a sound volume parameter, information concerning voiced or unvoiced excitation and the period of the vocal band base frequency. The voiced/unvoiced decision involves rendering only practically absolutely secure deci- sions. If a decision criterion does not yield a secure decision, the method proceeds to a subsequent criterion and so forth, until a definitely secure decision is possible. Among others, the energy of the speech signal, the number of its zero transitions, the energy of the residual error signal, the autocorre- lation maxima of the residual error signal and trans- verse comparisons of the preceding speech sections are used as the decision criteria.

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