commit 1f33a37565421d7a33149281456cad4a5ba3a5fe
author Per Åhgren <peah@webrtc.org> Wed Oct 11 00:36:53 2017
committer Commit Bot <commit-bot@chromium.org> Wed Oct 11 07:28:09 2017
tree 16e3b92597a1cf89bab15f763d7505b09c2e7ee0
parent 05d9822e55a10cda0d7c80aafb1cd1c671977316

AEC3 tunings to increase the transparency

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}