aa1a43e31f
This change disables the ERLE estimation of onsets and instead assumes minimum ERLE. This reduces the risk of echo leaks during onsets. The estimated ERLE was sometimes incorrect due to: - Not enough data to train on. - Platform noise suppression can change the echo-path. Bug: chromium:119942,webrtc:10341 Change-Id: I1dd1c0f160489e76eb784f07e99af02f44f387ec Reviewed-on: https://webrtc-review.googlesource.com/c/123782 Reviewed-by: Sam Zackrisson <saza@webrtc.org> Reviewed-by: Jesus de Vicente Pena <devicentepena@webrtc.org> Commit-Queue: Gustaf Ullberg <gustaf@webrtc.org> Cr-Commit-Position: refs/heads/master@{#26794}
80 lines
2.6 KiB
C++
80 lines
2.6 KiB
C++
/*
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* Copyright (c) 2018 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 MODULES_AUDIO_PROCESSING_AEC3_SUBBAND_ERLE_ESTIMATOR_H_
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#define MODULES_AUDIO_PROCESSING_AEC3_SUBBAND_ERLE_ESTIMATOR_H_
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#include <stddef.h>
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#include <array>
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#include <memory>
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#include <vector>
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#include "api/array_view.h"
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#include "api/audio/echo_canceller3_config.h"
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#include "modules/audio_processing/aec3/aec3_common.h"
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#include "modules/audio_processing/logging/apm_data_dumper.h"
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namespace webrtc {
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// Estimates the echo return loss enhancement for each frequency subband.
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class SubbandErleEstimator {
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public:
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explicit SubbandErleEstimator(const EchoCanceller3Config& config);
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~SubbandErleEstimator();
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// Resets the ERLE estimator.
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void Reset();
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// Updates the ERLE estimate.
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void Update(rtc::ArrayView<const float> X2,
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rtc::ArrayView<const float> Y2,
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rtc::ArrayView<const float> E2,
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bool converged_filter,
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bool onset_detection);
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// Returns the ERLE estimate.
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const std::array<float, kFftLengthBy2Plus1>& Erle() const { return erle_; }
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// Returns the ERLE estimate at onsets.
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rtc::ArrayView<const float> ErleOnsets() const { return erle_onsets_; }
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void Dump(const std::unique_ptr<ApmDataDumper>& data_dumper) const;
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private:
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struct AccumulatedSpectra {
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std::array<float, kFftLengthBy2Plus1> Y2_;
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std::array<float, kFftLengthBy2Plus1> E2_;
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std::array<bool, kFftLengthBy2Plus1> low_render_energy_;
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std::array<int, kFftLengthBy2Plus1> num_points_;
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};
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void UpdateAccumulatedSpectra(rtc::ArrayView<const float> X2,
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rtc::ArrayView<const float> Y2,
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rtc::ArrayView<const float> E2);
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void ResetAccumulatedSpectra();
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void UpdateBands(bool onset_detection);
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void DecreaseErlePerBandForLowRenderSignals();
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const float min_erle_;
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const std::array<float, kFftLengthBy2Plus1> max_erle_;
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const bool use_min_erle_during_onsets_;
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AccumulatedSpectra accum_spectra_;
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std::array<float, kFftLengthBy2Plus1> erle_;
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std::array<float, kFftLengthBy2Plus1> erle_onsets_;
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std::array<bool, kFftLengthBy2Plus1> coming_onset_;
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std::array<int, kFftLengthBy2Plus1> hold_counters_;
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};
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} // namespace webrtc
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#endif // MODULES_AUDIO_PROCESSING_AEC3_SUBBAND_ERLE_ESTIMATOR_H_
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