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It does: -Handle saturations in a better manner by adding different gain change step sizes for upwards and downwards changes, as well as when there is saturation. -Handle conditions with initial noise-only regions in a better way by setting a high initial peak level estimate which is gradually reduced until certainty about the peak level is achieved. -Limit the maximum gain to limit noise amplification, and to reflect that it initially is intended to be used in cascade with the fixed digital AGC mode. -Lower the maximum allowed stationary noise floor to reduce the risk of excessive noise amplification. -Lower the target gain to reduce the risk of causing the AEC on the other end to fail due to high playout levels triggering nonlinearities. This also reduces the risk for saturation. -Handle the noise-only regions in a better manner. NOTRY=true TBR=aleloi BUG=webrtc:5920 Review-Url: https://codereview.webrtc.org/2111553002 Cr-Commit-Position: refs/heads/master@{#13350}
23 lines
806 B
C++
23 lines
806 B
C++
/*
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* Copyright (c) 2016 The WebRTC project authors. All Rights Reserved.
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*
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* Use of this source code is governed by a BSD-style license
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* that can be found in the LICENSE file in the root of the source
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* tree. An additional intellectual property rights grant can be found
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* in the file PATENTS. All contributing project authors may
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* be found in the AUTHORS file in the root of the source tree.
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*/
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#ifndef WEBRTC_MODULES_AUDIO_PROCESSING_LEVEL_CONTROLLER_LC_CONSTANTS_H_
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#define WEBRTC_MODULES_AUDIO_PROCESSING_LEVEL_CONTROLLER_LC_CONSTANTS_H_
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namespace webrtc {
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const float kMaxLcGain = 10;
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const float kMaxLcNoisePower = 100.f * 100.f;
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const float kTargetLcPeakLevel = 0.5f * 32767.f;
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} // namespace webrtc
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#endif // WEBRTC_MODULES_AUDIO_PROCESSING_LEVEL_CONTROLLER_LC_CONSTANTS_H_
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