Buildup of echo suppression: Effects of echo delay and source position
نویسندگان
چکیده
منابع مشابه
Estimating the Delay and Coloration Effect of the Acoustic Echo Path for Low Complexity Echo Suppression
Acoustic echoes arise whenever there is acoustic coupling between a loudspeaker and a microphone. A traditional solution for eliminating the undesired echo signal is an acoustic echo canceler (AEC), which identifies the echo path between a loudspeaker and a microphone by means of an adaptive filter. The echo signal can be canceled successfully when the modeling filter approaches the true echo p...
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The so-called semi-blind source separation (SBSS) is an extension of BSS when some signals can be directly and individually measured. SBSS can be used to implement multi-channel acoustic cancellation (MCAEC) without the need for double-talk detection. However, traditional MCAEC approaches based on least mean-square (LMS) lead to a non-unique solution due to correlated sources formed when a sing...
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We describe a combined nonlinear acoustic echo cancellation and residual echo suppression system. The echo canceler uses parallel Hammerstein branches consisting of fixed nonlinear basis functions and linear adaptive filters. The residual echo suppressor uses an Artificial Neural Network for modeling of the residual echo spectrum from spectral features computed from the far-end signal. We show ...
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|Modelling acoustic impulse responses with lengths up to 250 ms is required for high quality echo cancellation in strongly reverberating environments , leading to FIR adaptive lters with several thousands of taps. Classical LMS-based solutions then clearly fail as they exceed the computational capabilities of present-day DSPs. Cheaper alternative solutions have been proposed and are mainly base...
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Locating sounds in realistic scenes is challenging because of distracting echoes and coarse spatial acoustic estimates. Fortunately, listeners can improve performance through several compensatory mechanisms. For instance, their brains perceptually suppress short latency (1-10 ms) echoes by constructing a representation of the acoustic environment in a process called the precedence effect. This ...
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ژورنال
عنوان ژورنال: The Journal of the Acoustical Society of America
سال: 1993
ISSN: 0001-4966
DOI: 10.1121/1.406399