INTERSPEECH 2008
9th Annual Conference of the International Speech Communication Association

Brisbane, Australia
September 22-26, 2008

Robust Signal-to-Noise Ratio Estimation Based on Waveform Amplitude Distribution Analysis

Chanwoo Kim, Richard M. Stern

Carnegie Mellon University, USA

In this paper, we introduce a new algorithm for estimating the signal-to-noise ratio (SNR) of speech signals, called WADA-SNR (Waveform Amplitude Distribution Analysis). In this algorithm we assume that the amplitude distribution of clean speech can be approximated by the Gamma distribution with a shaping parameter of 0.4, and that an additive noise signal is Gaussian. Based on this assumption, we can estimate the SNR by examining the amplitude distribution of the noise-corrupted speech. We evaluate the performance of the WADA-SNR algorithm on databases corrupted by white noise, background music, and interfering speech. The WADA-SNR algorithm shows significantly less bias and less variability with respect to the type of noise compared to the standard NIST STNR algorithm. In addition, the algorithm is quite computationally efficient.

Full Paper

Bibliographic reference.  Kim, Chanwoo / Stern, Richard M. (2008): "Robust signal-to-noise ratio estimation based on waveform amplitude distribution analysis", In INTERSPEECH-2008, 2598-2601.