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Note: estimation is turned OFF if config_.ep_strength.default_len is set >= 0 (in this case config_.ep_strength.default_len defines a constant echo decay factor), and hence turned ON if < 0. In case the echo tail estimation is turned ON, -config_.ep_strength.default_len is the starting point for the estimator. The estimation is done in two passes; first we go through all "sections" (corresponding to chunks of length kFftLengthBy2) of the filter impulse response to determine which sections correspond to a "stable" decay", and then the second pass we go through each stable decay section and estimate the decay. The actual decay estimation is based on linear regression of the log magnitude of the squared impulse response. A bunch of sanity checks are also performed continuously to avoid estimation error during e.g., filter adaptation. Bug: webrtc:8924 Change-Id: I686ce3f3e8b6b472348f8d6e01fb44c31e25145d Reviewed-on: https://webrtc-review.googlesource.com/48440 Commit-Queue: Christian Schuldt <cschuldt@webrtc.org> Reviewed-by: Per Åhgren <peah@webrtc.org> Cr-Commit-Position: refs/heads/master@{#22247} |
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| .. | ||
| aec_dump.cc | ||
| aec_dump.h | ||
| audio_frame_view.h | ||
| audio_processing.cc | ||
| audio_processing.h | ||
| audio_processing_statistics.cc | ||
| audio_processing_statistics.h | ||
| config.cc | ||
| config.h | ||
| mock_audio_processing.h | ||