Voice over IP (VoIP) applications are now very popular and widely used on the Internet. Such applications use receiver playout buffers to smooth delay variations so as to reconstruct the periodic form of the transmitted packets. Packets arriving after their scheduled playout time are considered late and are not played out. Playout delay control algorithms often operate by updating the playout d...

The increase in life expectancy, according to the World Health Organization, is a fact, and with it rises incidence of age-related neurodegenerative diseases. most recurrent symptoms are those associated tremors resulting from Parkinson’s disease (PD) or essential (ETs). main alternatives for treatment these patients medication surgical intervention, which sometimes have restrictions side effec...

The Global Positioning System (GPS) signals are very weak signal over wireless channels, so they are vulnerable to in-band interferences. Therefore, even a low-power interference can easily spoof GPS receivers. Among the variety of GPS signal interference, spoofing is considered as the most dangerous intentional interference. The spoofing effects can mitigate with an appropriate strategy in the...

In this paper, a variable step-size block normalized least mean square (VSSBNLMS) algorithm is derived to cancel the feedback interference in a Digital On-Channel Repeater (DOCR) for the Digital Terrestrial Television Broadcasting (DTTB) networks. By dividing the input signal into blocks with the same length and updating the tap weights once per every block, the computational complexity can be ...

In this paper, we propose an error estimate algorithm (EEA) for stereophonic 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) algorithm. In the EEA, with the minimum error signal fixed, we compute the filter lengths so that the error signal may approximate the minimum ...

The windup properties of a recently suggested recursive parameter estimation algorithm are investigated in comparison with a number of well-known techniques such as the Normalized Least Squares Algorithm (NLMS) and the Kalman filter (KF). An acoustic echo cancellation application is used as a benchmark for comparing the properties of different approaches. The basic performance of the method, bo...

This paper provides analysis of identification of acoustic transfer functions between two microphones and investigation of modified application from two-microphone adaptive noise cancelling and beamforming methods. Based on this, we will perform real-time performance comparisons to obtain the best solution to speech enhancement and noise cancellation. Experiments are processed by software imple...

We propose a two-stage adaptive filtering process for canceling narrowband interference from a wideband signal process, based on a reference signal consisting of a Doppler shifted version of the interference. The first stage uses the timevarying behavior of NLMS with large step-size to produce an estimate of the interference signal, in which the Doppler shift is mitigated. The second stage uses...

The performance of linear acoustic echo cancelers degrades if nonnegligible nonlinear distortion is introduced into the echo path as, e.g., caused by low-cost loudspeaker systems driven at high volume. Adaptive second-order Volterra filters are known to effectively model nonlinear acoustic echo paths. In this contribution we propose an extension of the proportionate NLMS (PNLMS) to second-order...