A method for suppressing speech while retaining background sound is presented in this paper. The procedure is useful for audio forensics investigations in which a strong foreground sound source or conversation obscures subtle background sounds or utterances that may be important to the investigation. The procedure uses a sinusoidal speech model to represent the strong foreground signal and then performs a synchronous subtraction to isolate the background sounds that are not well-modeled as part of the speech signal, thereby enhancing the audibility of the background material.

Author: Maher, Robert C.
Affiliation: Montana State University, Bozeman, MT, USA
AES Convention: 133 (October 2012) Paper Number: 8731
Publication Date: October 25, 2012
Subject: Emerging Audio Technologies

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