A PERCEPTUAL PERFORMANCE MEASURE FOR ADAPTIVE ECHO CANCELLERS IN PACKET-BASED TELEPHONY (WedAmPO1)

Author(s) : James Gordy (Carleton University, Canada) Rafik Goubran (Carleton University, Canada)

Abstract : In this paper we investigate performance measures of adaptive echo cancellers for packet-based telephony. It is shown that steady-state echo return loss enhancement (ERLE) does not accurately reflect perceived echo canceller convergence when background noise is present. An upper bound is derived for the maximum perceivable ERLE, and an algorithm is introduced for calculating ERLE that incorporates these masking effects. Simulation results show a clear correspondence between the new performance measure and the perceptual upper bound induced by the presence of background noise.

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