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Jan 10, 2019Open    AccessArticle

The Finite-Precision Numerical Effects Analysis of Infinite Impulse Response

Ganbaatar Nandintsetseg, Xiang-E Sun
This paper mainly uses the MATLAB software to design IIR digital filter with the amplitude frequency characteristic method and zero-pole method, and then analyzes the effect of coefficient quantization and quantization effects in IIR digital filter arithmetic. It is that we can use the software to draw some pictures. These pictures can show coefficient sys

Sep 28, 2017Open    AccessArticle

Oscillatory Solutions of Lossless Transmission Lines Terminated by Nonlinear Resistance and in Series Connected Inductance

Vasil G. Angelov
The present paper is devoted to the investigation of lossless transmission lines terminated by a nonlinear load with an interval of negative differential resistance and in series connected conductance. In contrast of almost all paper when i=f(u), here the case u=f(i) is considered. A general method of reducing the mixed problem to an initial value problem for neutral system on the boundary

Mar 30, 2017Open    AccessArticle

Research on Speech Endpoint Detection Algorithm with Low SNR

Jian Wei, Xiang’e Sun
The detection of speech endpoint is an important application for speech signal processing. Although there are variance methods, the endpoint can’t be detected accurately in low SNR (Signal to Noise Ratio). The paper pointes out an endpoint detection algorithm combining two methods together: the one is improved spectral subtraction based on multitaper spectral estimation, and the other is BARK subband variance in frequency domain.

Nov 07, 2016Open    AccessArticle

Oscillator with Distributed Nonlinear Structure on a Segment of Lossy Transmission Line

Vasil G. Angelov
We consider a model of self-oscillator with distributed amplifying structure realized on a segment of lossy transmission line. The distributed structure of tunnel diode type generates nonlinearity of polynomial type in the hyperbolic transmission line system. The transmission line is terminated by nonlinear reactive elements at both ends. This means that using Kirchhoff’s law we obtain nonlinear boundary conditions. Then a mixed p

Jul 28, 2014Open    AccessArticle

Validation of Optimum Algorithm Parameters Required to Estimate Vocal Tract Shape for Children Using LPC Analysis

Nilashree S. Wankhede, Milind S. Shah

Severe or profound deafness in hearing impaired children, can curb their ability to speak due to the lack of auditory feedback. There has been a considerable attempt in developing commercial speech training aids for such children which give feedback of acoustic and articulatory parameters. Speech training aids based on visual feedback of vocal tract shape (VTS) are reported to be useful for the improvement in speech production. Since realistic VTS estima