zqz/platform-external-webrtc
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

AGC2 lightweight noise floor estimator

Browse Source 
The current noise level estimator has a bug due to which the estimated
level decays to the lower bound in a few seconds when speech is observed.
Instead of fixing the current implementation, which is based on a
stationarity classifier, an alternative, lightweight, noise floor
estimator has been added and tuned for AGC2.

Tested on several AEC dumps including HW mute, music and fast talking.

Bug: webrtc:7494
Change-Id: Iae4cff9fc955a716878f830957e893cd5bc59446
Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/214133
Commit-Queue: Alessio Bazzica <alessiob@webrtc.org>
Reviewed-by: Per Åhgren <peah@webrtc.org>
Cr-Commit-Position: refs/heads/master@{#33733}
This commit is contained in:
Alessio Bazzica
2021-04-14 16:17:09 +02:00
committed by Commit Bot
parent 3ab7a55f6e
commit 61982a7f2d
10 changed files with 246 additions and 42 deletions
Download Patch File Download Diff File Expand all files Collapse all files

15
modules/audio_processing/include/audio_processing.cc
View File

@ -57,6 +57,17 @@ std::string GainController2LevelEstimatorToString(
RTC_CHECK_NOTREACHED();
}
std::string GainController2NoiseEstimatorToString(
const Agc2Config::NoiseEstimator& type) {
switch (type) {
case Agc2Config::NoiseEstimator::kStationaryNoise:
return "StationaryNoise";
case Agc2Config::NoiseEstimator::kNoiseFloor:
return "NoiseFloor";
}
RTC_CHECK_NOTREACHED();
}
} // namespace
constexpr int AudioProcessing::kNativeSampleRatesHz[];
@ -160,7 +171,9 @@ std::string AudioProcessing::Config::ToString() const {
<< ", fixed_digital: { gain_db: "
<< gain_controller2.fixed_digital.gain_db
<< " }, adaptive_digital: { enabled: "
<< gain_controller2.adaptive_digital.enabled
<< gain_controller2.adaptive_digital.enabled << ", noise_estimator: "
<< GainController2NoiseEstimatorToString(
gain_controller2.adaptive_digital.noise_estimator)
<< ", level_estimator: { vad_probability_attack: "
<< gain_controller2.adaptive_digital.vad_probability_attack << ", type: "
<< GainController2LevelEstimatorToString(