This CL changes the tuning of AEC3 to increase the transparency.
In particular:
-The present parameters are re-tuned.
-An oversuppression factor is added in the newly added soft-knee in
the NLP gain. The purpose of this is to avoid fluctuations in the
residual echo.
-The dynamics of the computed gain are bounded to ensure that the
specified gain characteristics are realizable without echo leakage.
This also adds robustness against echo leakage in frequency regions
that are poorly estimated.
This change was needed to avoid echo leakage from the above
tunings.
Bug: chromium:773543,webrtc:8378
Change-Id: If8acc41c1423a6a2fa6f8c4daf2735c86f0b529a
Reviewed-on: https://webrtc-review.googlesource.com/8262
Reviewed-by: Gustaf Ullberg <gustaf@webrtc.org>
Commit-Queue: Per Åhgren <peah@webrtc.org>
Cr-Commit-Position: refs/heads/master@{#20231}
1f33a37565