Patent ID: 7080007
Filing Date: 2006-07-18
Classification: G10L

Abstract:
1. A Speech Absence Probability (SAP) computing device for computing the SAP indicating probability that speech is absent in a m th frame, from a first through Nc th posteriori (Nc means the total number of channels) Signal to Noise Ratios (SNR) calculated with regard to the m th frame of a speech signal and a first through Nc th predicted SNRs predicted with regard to the m th frame, the SAP computing device comprising: a first through Nc a first multiplying unit for multiplying the first through Nc an adding unit for adding each of the multiplication results received from the first multiplying unit to a predetermined value, and outputting the added results; a second multiplying unit for multiplying the added results received from the adding unit and outputting the multiplication result; and a inverse number calculator for calculating inverse number of the multiplication result received from the second multiplying unit and outputting the calculated inverse number as the SAP.