Survey of Sparse Adaptive Filters for Acoustic Echo Cancellation
نویسندگان
چکیده
منابع مشابه
Adaptive Volterra filters for nonlinear acoustic echo cancellation
More than 20 years ago it was shown that adaptive Volterra filters can be used for telephone echo cancellation, but the inherent need for a large number of coefficients has inhibited their practical use. Recently, first attempts have been made to combat nonlinearities in the acoustic echo path of hands-free telephones, which are caused by low-cost audio components. As these attempts are based o...
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Typical approaches to acoustic echo cancellation (AEC) in mobile telephones employ adaptive linear algorithms, such as the normalized least mean squares (NLMS) algorithm. Smaller, cheaper components on these devices introduce nonlinearities into the echo path, which adversely affect performance of linear AEC systems and necessitate means of nonlinear compensation. Memoryless nonlinear blocks th...
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A digital sound system resembles the wireless network link transmission system. A wireless network link is affected by several disturbing factors: fading, attenuation, non-linear distortion and noise. These factors are also unavoidable in acoustic echo cancellation. A few number of digital adaptive filter algorithms are approached to detect and cancel the noise in a system. Among these algorith...
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The use of hands-free communication in cars, computer applications and video conferencing has created a demand for high-quality acoustic echo cancellation. In these applications the acoustic channel has typically a long impulse response in the order of 100ms. Typical lengths of adaptive FIRfilters can be 500-1500 taps. In order to reduce the complexity and also to improve the convergence rate, ...
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Acoustic echo cancellers in today' s speakerphones or video conferencing systems rely on the assumption of a linear echo path. Low-cost audio equipment or constraints of portable communication systems cause nonlinear distortions, which limit the echo return loss enhancement achievable by linear adaptation schemes. These distortions are a superposition of different effects, which can be modelled...
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ژورنال
عنوان ژورنال: International Journal of Image, Graphics and Signal Processing
سال: 2013
ISSN: 2074-9074,2074-9082
DOI: 10.5815/ijigsp.2013.01.03