[opus] Opus Voice denoising?

[daniel.brox at picotera.co]

Hi, 

Does Opus Voice offer denoising preprocessing like Speex?  I'm trying to
decide between using Speex denoising (Ephraim Malah algorithm), Opus
Voice denoising (if it exists), and spectral subtraction using the Opus
Voice voice activity detector.  If anyone has an opinion on which
strategy is optimal for denoising low SNR (SNR between 0 and 10) noisy
speech, please comment.  Regards
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