This paper presents analytical and Monte Carlo results for a stochastic gradient adaptive scheme that tracks a time-varying polynomial Wiener system [i.e., a linear time-invariant (LTI) filter with memory followed by a time-varying memoryless polynomial nonlinearity]. The adaptive scheme consists of two phases: 1) estimation of the LTI memory using the LMS algorithm and 2) tracking the time-var...

The performance of Wiener filters in restoring the quality and intelligibility of noisy speech depends on: (i) the accuracy of the estimates of the power spectra or the correlation values of the noise and the speech processes, and (ii) on the Wiener filter structure. In this paper a Bayesian method is proposed where model combination and model decomposition are employed for the estimation of pa...

In the modern age, use of video has become fundamental in communication and this led to its through an increasing number devices. The higher resolution required for images videos leads more memory space efficient data compression, obtained by improving coding techniques. For reason, Alliance Open Media (AOMedia) developed a new open-source royalty-free codec, named AOMedia Video 1 (AV1). This w...

In this paper, a new digital image watermark algorithm using wavelet packet transform and hybrid filter is proposed for right protection. The proposed watermark algorithm applies watermark to the overall subband that include the lowest frequency band and uses hybrid filter to remove the noise that was added to the watermarked image. The hybrid filter consists of median filter and wiener filter....