We propose three new adaptive noise suppression algorithms for enhancing noise-corrupted speech: smoothed spectral subtraction (SSS), vector quantization of line spectral frequencies (VQ-LSF), and modiied Wiener ltering (MWF). SSS is an improved version of the well-known spectral subtraction algorithm, while the other two methods are based on generalized Wiener ltering. We have compared these t...

We introduce two independent approaches for phase noise suppression. The dominant effects, responsible for the degradation of an OFDM system performance, if phase noise is present, are identified. We found out, that the system performance is strongly influenced by certain phase noise realizations, which cause burst errors, resulting in the performance error floor. Consideration of the system ca...

Multi-layer feedforward neural networks are trained using the error back-propagation(BP) algorithm. This algorithm minimizes the error between outputs of a neural network(NN) and training data. Hence, in the case of noisy training data, a trained network memorizes noisy outputs for given inputs. Such learning is called rote memorization learning(RML). In this paper we propose error correcting m...

Several adaptive LMS L-lters, both constrained and unconstrained ones, are developed for noise suppression in images and being compared in this paper. First, the location-invariant LMS L-lter for a nonconstant signal corrupted by zero-mean additive white noise is derived. It is demonstrated that the location-invariant LMS L-lter can be described in terms of the generalized linearly constrained ...

We have used Monte Carlo simulation to calculate the shot-noise intensity SI(v) at ~two-dimensional! hopping using two models: a slanted lattice of localized sites with equal energies and a set of localized sites with random positions and energies. For wide samples we have found a similar dependence of the Fano factor F[SI(0)/2eI on the sample length L: F}L 2a where a50.8560.02 and a50.8560.07 ...

The medial olivocochlear (MOC) bundle reduces the gain of the cochlear amplifier through reflexive activation by sound. Physiological results indicate that MOC-induced reduction in cochlear gain can enhance the response to signals when presented in masking noise. Some previous studies suggest that this "antimasking" effect of the MOC system plays a role in speech-in-noise perception. The presen...

efficient Ci is excluded from the reconstruction if I Ci Iao/21logK, where oa is the standard deviation of the noise, and K is the length of the obserApproaches to wavelet-based denoising (or signal ention of the noise, and K is the length of the obser hancement) have so far relied on the assumption of norvation. Krim and Pesquet [3] have used Rissanen's mally distributed perturbations. To rela...

This paper relates to correcting colours in digital photography. Three low pass filters are used to prevent noise amplification during colour correction. It is well known that a straightforward application of a low pass filter reduces the sharpness of an image. In this paper, the filtering is applied in a non-conventional way which naturally compensates the blur introduced by the filtering. Thi...

High quality light, whenever coherent light and nonclassical light, is more and more widely used in many filed. The coherent state behave minimum classical noise and better coherence, is mostly important light in quantum information, precise measurement and quantum metrology etc. In quantum information and quantum optics, a coherent light is used to entanglement generation (Ou, Z. et al. 1992),...