Patent ID: 8296135
Filing Date: 2012-10-23
Classification: G10L

Abstract:
1. A noise cancellation apparatus comprising: a noise estimation module for receiving a noise-containing input speech, and estimating a noise therefrom to output the estimated noise; a first Wiener filter module for receiving the input speech, and applying a first Wiener filter thereto to output a first estimation of clean speech; a database for storing data of a Gaussian mixture model for modeling clean speech; an minimum mean square error estimation module for receiving the first estimation of clean speech and the data of the Gaussian mixture model to output a second estimation of clean speech; and a final clean speech estimation module for receiving the second estimation of clean speech from the minimum mean square error estimation module and the estimated noise from the noise estimation module, and obtaining a final Wiener filter gain therefrom to output a final estimation of clean speech by applying the final Wiener filter gain.