Method of discriminating between double-talk state and...

Details Method of discriminating between double-talk state and... Method of discriminating between double-talk state and...

H - Electricity

04

M

H04M 1/20 (2006.01) G10K 11/175 (2006.01) H04B 3/23 (2006.01) H04M 9/08 (2006.01)

Patent

CA 2501980

An apparatus is designed for processing a first audio signal at transmission and a second audio signal upon receipt so as to determine whether the second audio signal is provided under a double-talk state or a single-talk state. In the apparatus, a storage section stores the first audio signal. A convolution section convolutes the stored first audio signal with a variable coefficient to produce a reference signal. The variable coefficient is updated by an update addition value. A subtraction section subtracts the reference signal from the second audio signal to provide an error signal. A computation section computes the update addition value for the variable coefficient on the basis of the error signal and the first audio signal. A determination section determines whether the second audio signal is provided under the double-talk state or the single-talk state on the basis of the update addition value.

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