The WebRTC echo canceller 3 sometimes attenuate low-powered portions of the near-end speech, causing "muffled" voice with a reduced clarity.
The following revision refers to this bug: https://chromium.googlesource.com/external/webrtc.git/+/1d68089f4b68be04aaef0fdf0013412a01fab270 commit 1d68089f4b68be04aaef0fdf0013412a01fab270 Author: peah <peah@webrtc.org> Date: Tue May 23 11:07:10 2017 Transparency increasing tuning for AEC3. This CL increases the transparency of the AEC3 via tuning. The major changes are 1) Limiting the suppression gain to the 16 bit sample floor. 2) Controlling the rate of the suppression gain increase according to the signal characteristics. Apart from these tunings, the code for the suppression gain was refactored to increase/maintain the code quality after the above changes. BUG= webrtc:7519 , webrtc:7528 , chromium:715893 Review-Url: https://codereview.webrtc.org/2886733002 Cr-Commit-Position: refs/heads/master@{#18229} [modify] https://crrev.com/1d68089f4b68be04aaef0fdf0013412a01fab270/webrtc/modules/audio_processing/aec3/aec_state_unittest.cc [modify] https://crrev.com/1d68089f4b68be04aaef0fdf0013412a01fab270/webrtc/modules/audio_processing/aec3/echo_remover.cc [modify] https://crrev.com/1d68089f4b68be04aaef0fdf0013412a01fab270/webrtc/modules/audio_processing/aec3/erle_estimator.cc [modify] https://crrev.com/1d68089f4b68be04aaef0fdf0013412a01fab270/webrtc/modules/audio_processing/aec3/erle_estimator_unittest.cc [modify] https://crrev.com/1d68089f4b68be04aaef0fdf0013412a01fab270/webrtc/modules/audio_processing/aec3/suppression_gain.cc [modify] https://crrev.com/1d68089f4b68be04aaef0fdf0013412a01fab270/webrtc/modules/audio_processing/aec3/suppression_gain.h [modify] https://crrev.com/1d68089f4b68be04aaef0fdf0013412a01fab270/webrtc/modules/audio_processing/aec3/suppression_gain_unittest.cc
Comment 1 by maxmorin@chromium.org
, May 2 2017