We describe a novel algorithm for the estimation of the colored noise level in audio signals with mixed noise and sinusoidal components. The noise envelope model is based on the assumptions that the envelope varies slowly with frequency and that the magnitudes of the noise peaks obey a Rayleigh distribution. Our method is an extension of a recently proposed approach of spectral peak classificat...

An annoying musical residual noise is suffered in most speech enhancement systems. This paper applies a perceptual-based speech enhancement algorithm that considers masking properties to enhance speech signals corrupted by colored noise. Moreover, an optimal smoothing factor which is adapted by the variation of signal to spectral deviation ratio (SSDR) in successive frames is used to reduce the...

Abstract— Almost estimators are designed for the white observation noise. In the estimation problems, rather than the white observation noise, there might be actual cases where the observation noise is colored. This paper, from the viewpoint of the innovation theory, based on the recursive least-squares (RLS) Wiener fixed-point smoother and filter for the colored observation noise, newly propos...

A nonlinear multiband spectral subtraction method is investigated in this study to reduce the colored electronic noise in millimeter wave MMW radar conducted speech. Because the oversubtraction factor of each Bark frequency band can be adaptively adjusted, the nonuniform effects of colored noise in the spectrum of the MMW radar speech can be taken into account in the enhancement process. Both t...

Functional magnetic resonance (fMRI) data are often corrupted with colored noise. To account for this type of noise, many prewhitening and pre-coloring strategies have been proposed to process the fMRI time series prior to statistical inference. In this paper, a generalized likelihood ratio test for brain activation detection is proposed in which the temporal correlation structure of the noise ...

We develop and validate an algorithm for integrating stochastic differential equations under green noise. Utilizing it and the standard methods for computing dynamical systems under red and white noise, we address the problem of synchronization among chaotic oscillators in the presence of common colored noise. We find that colored noise can induce synchronization, but the onset of synchronizati...

Let A and B be two colored point sets in R2, with |A| ≤ |B|. We propose a process for determining matches, in terms of the bottleneck distance, betweenA and subsets of B under color preserving rigid motion, assuming that the position of all colored points in both sets contains a certain amount of ”noise”. The process consists of two main stages: a lossless filtering algorithm and a matching alg...

Colored noise can be generated by filtering of the white noise. It is a simple task. However, it becomes challenging if high operating speed of the generator is required. The realization of digital filter generally requires one multiplication per coefficient. Therefore, a high operating speed is achieved only with the cost of several generalpurpose multipliers. In this paper, a multiplierless r...

A generalized subspace approach is proposed for enhancement of speech corrupted by colored noise. A nonunitary transform, based on the simultaneous diagonalization of the clean speech and noise covariance matrices, is used to project the noisy signal onto a signal-plus-noise subspace and a noise subspace. The clean signal is estimated by nulling the signal components in the noise subspace and r...

An inhomogeneously broadened two-mode ring laser system with the colored pump noise is considered. The effects of the auto-correlation time, ,of the colored pump noise on the competition between two modes in the laser system are investigated for the first time by the computer simulation method. The results show that when the laser system works far above threshold, the stationary properties of ...