This change corrects the computation of the comfort noise gains.
Previously the comfort noise gain of band k, CG_k, was computed
from suppression gain of band k, SG_k, as:
CG_k = 1 - SG_k
But since the two signals are uncorrelated (the comfort noise
is randomly generated), the correct gain to maintain power is:
CG_k = sqrt(1 - SG_k^2).
Bug: webrtc:9967,chromium:902262
Change-Id: I393495742163d5e658bca4ab2f7a5067ab15af01
Reviewed-on: https://webrtc-review.googlesource.com/c/109580
Commit-Queue: Gustaf Ullberg <gustaf@webrtc.org>
Reviewed-by: Per Åhgren <peah@webrtc.org>
Cr-Commit-Position: refs/heads/master@{#25525}
83b00f020e