666becad58
The ERLE computation was improved by two means: - The update function was always called and just parts of the internal code reacts to the converged filter flag - When computing the ERLE, the ratio of energies is now computed using more points and, therefore, a more robust estimation is achieved. Bug: webrtc:9284 Change-Id: Ie4f871f19cfad1a13741352ddd7b0a27ad6c3fb6 Reviewed-on: https://webrtc-review.googlesource.com/77767 Reviewed-by: Per Åhgren <peah@webrtc.org> Commit-Queue: Jesus de Vicente Pena <devicentepena@webrtc.org> Cr-Commit-Position: refs/heads/master@{#23329}
62 lines
2.1 KiB
C++
62 lines
2.1 KiB
C++
/*
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* Copyright (c) 2017 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_ERLE_ESTIMATOR_H_
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#define MODULES_AUDIO_PROCESSING_AEC3_ERLE_ESTIMATOR_H_
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#include <array>
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#include "api/array_view.h"
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#include "modules/audio_processing/aec3/aec3_common.h"
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#include "rtc_base/constructormagic.h"
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namespace webrtc {
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// Estimates the echo return loss enhancement based on the signal spectra.
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class ErleEstimator {
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public:
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ErleEstimator(float min_erle, float max_erle_lf, float max_erle_hf);
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~ErleEstimator();
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// Updates the ERLE estimate.
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void Update(rtc::ArrayView<const float> render_spectrum,
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rtc::ArrayView<const float> capture_spectrum,
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rtc::ArrayView<const float> subtractor_spectrum,
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bool converged_filter);
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// Returns the most recent ERLE estimate.
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const std::array<float, kFftLengthBy2Plus1>& Erle() const { return erle_; }
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// Returns the ERLE that is estimated during onsets. Use for logging/testing.
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const std::array<float, kFftLengthBy2Plus1>& ErleOnsets() const {
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return erle_onsets_;
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}
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float ErleTimeDomain() const { return erle_time_domain_; }
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private:
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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<float, kFftLengthBy2Plus1> Y2_acum_;
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std::array<float, kFftLengthBy2Plus1> E2_acum_;
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std::array<int, kFftLengthBy2Plus1> num_points_;
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std::array<bool, kFftLengthBy2Plus1> coming_onset_;
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std::array<int, kFftLengthBy2Plus1> hold_counters_;
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float erle_time_domain_;
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int hold_counter_time_domain_;
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const float min_erle_;
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const float max_erle_lf_;
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const float max_erle_hf_;
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RTC_DISALLOW_COPY_AND_ASSIGN(ErleEstimator);
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};
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} // namespace webrtc
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#endif // MODULES_AUDIO_PROCESSING_AEC3_ERLE_ESTIMATOR_H_
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