This paper introduces two short-time spectral amplitude estimators for speech enhancement with multiple microphones. Based on joint Gaussian models of speech and noise Fourier coefficients, the clean speech amplitudes are estimated with respect to the MMSE or the MAP criterion. The estimators outperform single microphone minimum mean square amplitude estimators when the speech components are hi...

In this short note we show that the space of all ∂̄-free maps of any complex manifold Vc into Cn is always homotopically equivalent to the space of all sections of the corresponding bundle in the space of jets of smooth maps Vc → Cn. In particular, the space of all linear ordinary differential equations with complex-valued coefficients on an elliptic curve with the identical monodromy (defined a...

Vertical resolution is the most widely quoted and most frequently misunderstood performance specification for equipment that measures surface topography. Here I propose to use internationally standardized terms and definitions for measurement noise and surface topography repeatability as more meaningful quantifiers for measurement performance. A specific example is an interference microscope op...

Existing shape from focus (SFF) techniques cannot preserve depth edges and fine structural details a sequence of multi-focus images. Moreover, noise in the images affects accuracy map. In this paper, novel enhancement algorithm for SFF based on an adaptive weighted guided image filtering (AWGIF) is proposed to address above issues. The AWGIF applied decompose initial map which estimated by trad...

In a recent letter [Phys.Rev.Lett. 30, 3269 (1995)], we reported that a macroscopic chaotic determinism emerges in a multistable system: the unidirectional motion of a dissipative particle subject to an apparently symmetric chaotic noise occurs even if the particle is in a spatially symmetric potential. In this paper, we study the global dynamics of a dissipative particle by investigating the b...

A variety of techniques in machine vision involve representation of objects by using their shape skeleton. Many algorithms have been proposed to date for obtaining the skeletal shape of digital images. The noise models predominantly used in these techniques are restricted to boundary noise. In particular, instances of noise occurring inside object regions and causing their non-contiguity are pr...

Noise mapping is an effective method of visualizing and accessing noise pollution. In this paper, a noise-mapping method based on smartphones to effectively and easily measure environmental noise is proposed. By using this method, a noise map of an entire area can be created using limited measurement data. To achieve the measurement with certain precision, a set of methods was designed to calib...

Abstract Recent years have witnessed a growing interest in using WLAN fingerprint-based method for indoor localization system because of its cost-effectiveness and availability compared to other systems. In order rapidly deploy system, the crowdsourcing is applied alternate traditional deployment method. this paper, we proposed fast radio map building utilizing sensors inside mobile device Mult...

In this work, we derive the maximum a posteriori (MAP) symbol detector for a multiple-input multiple-output system in the presence of Wiener phase noise due to noisy local oscillators. As in single-antenna systems, the computation of the optimal receiver is an infinite dimensional problem and is thus unimplementable in practice. In this purview, we propose three suboptimal, low-complexity algor...