Echo-cancellation
An improved error estimation algorithm for stereophonic acoustic echo cancellation systems
... acoustic echo cancellation (SAEC) that is based on an extension of the set-membership normalized least mean-squares (SM-NLMS) algorithm combined with the affine projection (AP) ...the echo paths ...
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Efficient multichannel acoustic echo cancellation using constrained tap selection schemes in the subband domain
... best echo cancellation perfor- mance, while the 3DM and SPU schemes yield the poorest performance despite obtaining the highest values for the Closeness ...overall echo cancellation per- ...
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Modified Approach for VSS NLMS Algorithm for Echo Cancellation in Teleconference System
... as echo cancellation. The main aim of the acoustic echo cancellation is to remove the echoes present in desired signal and to provide echo free speech to the ...acoustic echo ...
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Using active echo cancellation to minimize stimulus reverberations during hearing studies conducted with the auditory brain response (ABR) technique
... reverberations. Echo cancellation is nearly perfect, although location-spe- ...of echo cancellation dimin- ishes with distance from test subject and hydrophone (or microphone) used to create ...
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A Novel Hybrid Technique for Acoustic Echo Cancellation and Noise reduction Using LMS Filter and ANFIS Based Nonlinear Filter
... for echo cancelation in speech signals, again the least mean squares (LMS), normalized least mean squares (NLMS) and recursive least squares (RLS) are popular algorithms for estimating the RIR and subsequently ...
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Acoustic Echo Cancellation by Adaptive Combination of Normalized Sub band Adaptive Filters by Using Stochastic Gradient Algorithm
... Acoustic echo is a common occurrence in today’s telecommunication ...acoustic echo is distracting to both users and causes a reduction in the quality of the ...unwanted echo thus increasing ...
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A Logic gate based Double Talk Detector for Acoustic Echo Cancellation
... MATLAB R2013a platform is used for the simulations. Far end and near end signal are recorded at sampling rate of 8000Hz. Signals are loaded into matlab with .wav extension. The procedure of echo ...
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Adaptive echo cancellation in telecommunications
... Various authors have carried out analyses to quantify these effects, particularly that pertaining to asymptotic performance. Earlier analyses [24], [21] considered closed loop adaptive echo cancelling systems in ...
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Analysis the results of Acoustic Echo Cancellation for speech processing using LMS Adaptive Filtering Algorithm
... The echo has been a big issue in communication ...acoustic echo in hands-free communications [1]. The Generation of acoustic echo through direct coupling and reverberations [2] can be shown in ...
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New Technique for Recursive Least Square Adaptive Algorithm for Acoustic Echo Cancellation of Speech signal in an auditorium
... The assembly room, as a spot for listening created from the classical open-air theaters. The outline of different sorts of auditoriums has turn into a mind boggling issue, because in addition to its different, sometimes ...
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Matlab Implementation of Echo Cancellation in Telephone Line
... Hybrid echo is generated by the public switched telephone network (PSTN) through the reflection of electrical energy by a device called a hybrid (hence the term hybrid ...end echo is usually a greater ...
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A New Method for a Nonlinear Acoustic Echo Cancellation System
... Acoustic echo cancellation (AEC) is a fundamental requirement of signal processing to increase the quality of ...linear echo cancellation had been ...nonlinear echo path. In this paper, ...
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Echo cancellation in VoIP using digital adaptive filters
... Sondhi (1967) was the first to publish the idea of applying adaptive filters to echo cancellation, although in his paper the author acknowledges J. L. Kelly Jr of Bell Laboratories as having the original ...
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A Bayesian network approach to linear and nonlinear acoustic echo cancellation
... acoustic echo cancellation ...nonlinear echo path) and its mathematical relation to the observation, it is shown that the normalized least mean square algorithm (with fixed and adaptive stepsize), ...
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Performance Analysis of Acoustic Echo Cancellation in Sound Processing
... Echo is to simulate the effect of reverberation from the speakers , one or several delayed signals are added to the original ...as echo, the delay has to be of order 35 milliseconds or ...of echo ...
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Significance aware filtering for nonlinear acoustic echo cancellation
... linear echo canceler for network echoes in telephone lines [1], linear echo cancellation has evolved to a key ingredient of almost any full-duplex speech communication ...acoustic echo paths ...
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An overview on optimized NLMS algorithms for acoustic echo cancellation
... Acoustic echo cancellation represents one of the most challenging system identification problems. The most used adaptive filter in this application is the popular normalized least mean square (NLMS) ...
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First Responder ECHO: Developing an Innovative Telementoring Program
... Responder ECHO are to: pro- vide: 1) continued learning of best practices; 2) provide a community of practice for first responders; 3) promote psychological wellness in this critical ...
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MR Imaging Related Heating of Deep Brain Stimulation Electrodes: In Vitro Study
... and echo-planar imaging sequences (and, by implication, for conven- tional spin-echo sequences as well) in the head trans- mit-receive coil is linearly correlated with SAR and that sequences performed ...
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Pesudonymous and Rapid Roaming Verification using Group Signature
... A mobile signers needs to propose the external communication at the beginning which wants to appeal to its local communication domination intermediate to bring back the related access keys. While the signers navigate to ...
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