437d129ef5
The ERLE is used to estimate residual echo for echo suppression. The ERLE is reduced during far-end offset to avoid echo leakage. When there is a strong near-end present this can cause unnecessary transparency loss. This change adds an ERLE estimation that does not compensate for onsets and uses it for residual echo estimation when the suppressor considers the near-end to be dominant. Bug: webrtc:12686 Change-Id: Ida78eeacf1f95c6e62403f86ba3f2ff055898a84 Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/215323 Commit-Queue: Gustaf Ullberg <gustaf@webrtc.org> Reviewed-by: Jesus de Vicente Pena <devicentepena@webrtc.org> Cr-Commit-Position: refs/heads/master@{#33786}
101 lines
3.7 KiB
C++
101 lines
3.7 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 <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 "absl/types/optional.h"
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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/aec3/fullband_erle_estimator.h"
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#include "modules/audio_processing/aec3/render_buffer.h"
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#include "modules/audio_processing/aec3/signal_dependent_erle_estimator.h"
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#include "modules/audio_processing/aec3/subband_erle_estimator.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. One estimate is done per subband
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// and another one is done using the aggreation of energy over all the subbands.
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class ErleEstimator {
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public:
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ErleEstimator(size_t startup_phase_length_blocks,
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const EchoCanceller3Config& config,
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size_t num_capture_channels);
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~ErleEstimator();
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// Resets the fullband ERLE estimator and the subbands ERLE estimators.
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void Reset(bool delay_change);
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// Updates the ERLE estimates.
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void Update(
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const RenderBuffer& render_buffer,
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rtc::ArrayView<const std::vector<std::array<float, kFftLengthBy2Plus1>>>
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filter_frequency_responses,
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rtc::ArrayView<const float, kFftLengthBy2Plus1>
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avg_render_spectrum_with_reverb,
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rtc::ArrayView<const std::array<float, kFftLengthBy2Plus1>>
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capture_spectra,
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rtc::ArrayView<const std::array<float, kFftLengthBy2Plus1>>
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subtractor_spectra,
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const std::vector<bool>& converged_filters);
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// Returns the most recent subband ERLE estimates.
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rtc::ArrayView<const std::array<float, kFftLengthBy2Plus1>> Erle(
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bool onset_compensated) const {
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return signal_dependent_erle_estimator_
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? signal_dependent_erle_estimator_->Erle(onset_compensated)
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: subband_erle_estimator_.Erle(onset_compensated);
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}
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// Returns the subband ERLE that are estimated during onsets (only used for
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// testing).
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rtc::ArrayView<const std::array<float, kFftLengthBy2Plus1>> ErleDuringOnsets()
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const {
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return subband_erle_estimator_.ErleDuringOnsets();
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}
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// Returns the fullband ERLE estimate.
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float FullbandErleLog2() const {
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return fullband_erle_estimator_.FullbandErleLog2();
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}
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// Returns an estimation of the current linear filter quality based on the
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// current and past fullband ERLE estimates. The returned value is a float
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// vector with content between 0 and 1 where 1 indicates that, at this current
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// time instant, the linear filter is reaching its maximum subtraction
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// performance.
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rtc::ArrayView<const absl::optional<float>> GetInstLinearQualityEstimates()
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const {
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return fullband_erle_estimator_.GetInstLinearQualityEstimates();
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}
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void Dump(const std::unique_ptr<ApmDataDumper>& data_dumper) const;
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private:
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const size_t startup_phase_length_blocks_;
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FullBandErleEstimator fullband_erle_estimator_;
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SubbandErleEstimator subband_erle_estimator_;
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std::unique_ptr<SignalDependentErleEstimator>
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signal_dependent_erle_estimator_;
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size_t blocks_since_reset_ = 0;
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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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