Estimation of background noise in a variable rate vocoder

Details Estimation of background noise in a variable rate vocoder Estimation of background noise in a variable rate vocoder

G - Physics

10

L

G10L 21/02 (2006.01) G10L 19/00 (2006.01) G10L 19/12 (2006.01) G10L 19/14 (2006.01)

Patent

CA 2483324

A method of generating a current estimate of background noise (B') in a frame of speech in a speech signal (S(n)) comprising a plurality of frames. The method comprises: calculating an energy level (R(0)) of a frame of the speech signal (S(n)); obtaining an estimate of background noise (B) in a previous frame of the speech signal (S(n)); and generating, the current estimate of background noise (B') based on the energy level (R(0)) and the estimate of background noise (B) in a previous frame of the speech signal (S(n)). A speech processor configured to process a speech signal (S(n)) comprising a plurality of frames is also described.

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