Patent ID: 8744849
Filing Date: 2014-06-03
Classification: G10L,H04R

Abstract:
1. A microphone-array-based speech recognition system, combining a noise masking module for cancelling noise of input speech signals from an array of microphones, according to an inputted threshold, and comprising: at least a speech model and at least a filler model that receive respectively a noise-cancelled speech signal outputted by said noise masking module; a confidence measure score computation module that computes a confidence measure score with said at least a speech model and said at least a filler model for said threshold and the noise-cancelled speech signal; and a threshold adjustment module that adjusts said threshold and provides said threshold to said noise masking module to continue the noise cancelling for achieving a maximum confidence measure score computed by said confidence measure score computation module, thereby outputting a speech recognition result related to said maximum confidence measure score.