075cb2b2f7
In this work we introduce some changes on how the reverberation model for AEC3 is applied. Currently, the exponential modelling of the tails is applied over the linear echo estimates. That might result in an overestimation of the reverberation tails under certain conditions. In this work, the reverberation model is instead applied over an estimate of the energies at the tails of the linear estimate. Additionally, the stationary estimator is changed so it does not disable the aec immediately after a burst of activity. Bug: webrtc:9384,webrtc:9400,chromium:852257 Change-Id: Ia486694ed326cfe231fc688877c0b9b6e2c450ff Reviewed-on: https://webrtc-review.googlesource.com/82161 Reviewed-by: Per Åhgren <peah@webrtc.org> Commit-Queue: Jesus de Vicente Pena <devicentepena@webrtc.org> Cr-Commit-Position: refs/heads/master@{#23599}
83 lines
2.6 KiB
C++
83 lines
2.6 KiB
C++
/*
|
|
* Copyright (c) 2018 The WebRTC project authors. All Rights Reserved.
|
|
*
|
|
* Use of this source code is governed by a BSD-style license
|
|
* that can be found in the LICENSE file in the root of the source
|
|
* tree. An additional intellectual property rights grant can be found
|
|
* in the file PATENTS. All contributing project authors may
|
|
* be found in the AUTHORS file in the root of the source tree.
|
|
*/
|
|
|
|
#ifndef MODULES_AUDIO_PROCESSING_AEC3_ECHO_AUDIBILITY_H_
|
|
#define MODULES_AUDIO_PROCESSING_AEC3_ECHO_AUDIBILITY_H_
|
|
|
|
#include <algorithm>
|
|
#include <array>
|
|
#include <limits>
|
|
#include <memory>
|
|
#include <vector>
|
|
|
|
#include "api/array_view.h"
|
|
#include "api/optional.h"
|
|
#include "modules/audio_processing/aec3/matrix_buffer.h"
|
|
#include "modules/audio_processing/aec3/render_buffer.h"
|
|
#include "modules/audio_processing/aec3/stationarity_estimator.h"
|
|
#include "modules/audio_processing/aec3/vector_buffer.h"
|
|
#include "rtc_base/constructormagic.h"
|
|
|
|
namespace webrtc {
|
|
|
|
class ApmDataDumper;
|
|
|
|
class EchoAudibility {
|
|
public:
|
|
EchoAudibility();
|
|
~EchoAudibility();
|
|
|
|
// Feed new render data to the echo audibility estimator.
|
|
void Update(const RenderBuffer& render_buffer,
|
|
int delay_blocks,
|
|
bool external_delay_seen,
|
|
float reverb_decay);
|
|
|
|
// Get the residual echo scaling.
|
|
void GetResidualEchoScaling(rtc::ArrayView<float> residual_scaling) const {
|
|
for (size_t band = 0; band < residual_scaling.size(); ++band) {
|
|
if (render_stationarity_.IsBandStationary(band)) {
|
|
residual_scaling[band] = 0.f;
|
|
} else {
|
|
residual_scaling[band] = 1.0f;
|
|
}
|
|
}
|
|
}
|
|
|
|
private:
|
|
// Reset the EchoAudibility class.
|
|
void Reset();
|
|
|
|
// Updates the render stationarity flags for the current frame.
|
|
void UpdateRenderStationarityFlags(const RenderBuffer& render_buffer,
|
|
int delay_blocks,
|
|
float reverb_decay);
|
|
|
|
// Updates the noise estimator with the new render data since the previous
|
|
// call to this method.
|
|
void UpdateRenderNoiseEstimator(const VectorBuffer& spectrum_buffer,
|
|
const MatrixBuffer& block_buffer,
|
|
bool external_delay_seen);
|
|
|
|
// Returns a bool being true if the render signal contains just close to zero
|
|
// values.
|
|
bool IsRenderTooLow(const MatrixBuffer& block_buffer);
|
|
|
|
rtc::Optional<int> render_spectrum_write_prev_;
|
|
int render_block_write_prev_;
|
|
bool non_zero_render_seen_;
|
|
StationarityEstimator render_stationarity_;
|
|
RTC_DISALLOW_COPY_AND_ASSIGN(EchoAudibility);
|
|
};
|
|
|
|
} // namespace webrtc
|
|
|
|
#endif // MODULES_AUDIO_PROCESSING_AEC3_ECHO_AUDIBILITY_H_
|