论文信息 - Improved Proportionate Subband NLMS for Acoustic Echo Cancellation in Changing Environments

Improved Proportionate Subband NLMS for Acoustic Echo Cancellation in Changing Environments

Acoustic echo paths can change frequently in response to minor changes in the near-end room. Using echo path measurements obtained using commercial wideband hands-free terminals, it is demonstrated that the effects of these changes are not uniform across time and frequency. A subband echo canceler combined with a proportionate step-size adaptation algorithm is proposed to exploit time and frequency response characteristics of echo path changes to achieve faster tracking and higher echo attenuation. Improvements of 5-10 dB compared to fullband structures are observed for real changing echo environments with wideband speech inputs.

Rafik A. Goubran | Brady Laska | Miodrag Bolic

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