Method of and arrangement for distinguishing between voiced and

Details Method of and arrangement for distinguishing between voiced and Method of and arrangement for distinguishing between voiced and

1990-05-15

1993-03-23

Fleming, Michael R.

G10L 900

Patent

active

051971135

ABSTRACT:
In distinguishing between voiced and unvoiced speech elements use is made of the fact that the spectra of voiced sounds lie predominantly at or below about 1 kHz, and the spectra of unvoiced sounds lie predominantly at or above about 2 kHz. A change from a voiced sound to an unvoiced sound or vice versa always produces a clear shift of the spectrum, and that without such a change, there is no such clear shift. From the lower- and higher-frequency energy components, a measure of the location of the spectral centroid is derived which is used for a first decision. Based on the difference between two successive measures, a second decision is made by which the first can be corrected.

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"Reliable Voiced/Unvoiced Decision", S. G. Knorr, IEEE Transactions on Acoustics, Speech and Signal Processing, vol. ASSP-27, No. 3, Jun. 1979, pp. 263-267.

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