A robust time-varying filtering procedure for speech signals corrupted by mixed Gaussian and impulse noise is presented. It is based on the robust time-frequency distributions that can provide efficient representation of the noisy speech signals. The proposed approach has been compared with the time-varying filtering procedure based on the standard time-frequency distributions.

Because the classic intersecting cortical model (ICM) and the traditional image de-noising algorithm exist the deficiencies-the image collection, transmission and conversion are often subjected to impulse noise interference, thus affecting the quality of the image, therefore we improved the framework structure and related parameters of the ICM and proposed the adaptive image de-noising algorith...

In the actual communication system, the line echo is a frequent problem, so the line echo canceller is necessary. Traditionally, the cancellers are designed according to line noises based on the Gaussian noise model. However, the noises do not obey the Gaussian distribution; therefore the performances of algorithms decrease, even cannot be used. In order to solve this problem, this paper propos...

In this letter, a novel adaptive filter, the adaptive two-pass median (ATM) filter based on support vector machines (SVMs), is proposed to preserve more image details while effectively suppressing impulse noise for image restoration. The proposed filter is composed of a noise decision maker and two-pass median filters. Our new approach basically uses an SVM impulse detector to judge whether the...

It is imperative to remove impulse noise corrupted pixels in images, in order to facilitate the subsequent processing such as image analysis, segmentation, pattern recognition etc. Many linear and non linear filtering techniques have been proposed earlier to remove impulse noise, however the removal of impulse noise is often accomplished at the expense of blurred and distorted features of edges...

An analysis of phase noise in differential cross-coupled tuned tank voltage controlled oscillators is presented. The effect of active device noise sources as well as the noise due to the passive elements are taken into account. The predictions are in good agreement with the measurements for different tail currents and supply voltages. The effect of the complementary cross-coupled pair is analyz...