Patent ID: 7590526
Filing Date: 2009-09-15
Classification: G10L

Abstract:
1. A computer-implemented method for determining a first filter coefficient in a reverberation rejection technique comprising: obtaining the first filter coefficient in a reverberation rejection technique in which a second filter coefficient multiplied by a speech power spectrum in a past frame is subtracted from a speech spectrum in a current frame; utilizing the first filter coefficient with a computer processor so as to minimize a weighted summation with the speech power spectrum, wherein the first filter coefficient is the second filter coefficient number of the speech power spectrum in the past frame, subtracted from the speech power spectrum of a current frame; and determining the speech power spectrum in the current frame in a speech end reverberation segment where a fluctuation of the speech power spectrum is gradual compared to the case of no reverberation in the speech interval, and displaying the speech power spectrum on a computer display apparatus.