REVERBERATION ESTIMATOR

摘要

Provided are methods and systems for generating Direct-to-Reverberant Ratio (DRR) estimates. The methods and systems use a null-steered beamformer to produce accurate DRR estimates across a variety of room sizes, reverberation times, and source-receiver distances. The DRR estimation algorithm uses spatial selectivity to separate direct and reverberant energy and account for noise separately. The formulation considers the response of the beamformer to reverberant sound and the effect of noise. The DRR estimation algorithm is more robust to background noise than existing approaches, and is applicable where a signal is recorded with two or more microphones, such as with mobile communications devices, laptop computers, and the like.

主权项

1. A computer-implemented method comprising:
separating an audio signal into a direct path signal component and a reverberant path signal component using a beamformer; determining, for each of a plurality of frequency bins, a ratio of the power of the direct path signal component to the power of the reverberant path signal component; and combining the determined ratios over a range of the frequency bins.