نتایج جستجو برای: zero crossing

تعداد نتایج: 175212  

Journal: :EURASIP J. Adv. Sig. Proc. 2007
Kris Charles West Paul Lamere

Several authors have presented systems that estimate the audio similarity of two pieces of music through the calculation of a distance metric, such as the Euclidean distance, between spectral features calculated from the audio, related to the timbre or pitch of the signal. These features can be augmented with other, temporally or rhythmically based features such as zero-crossing rates, beat his...

1992
Miyuki Kawashima Ryuji Tokunaga Yuzo Hirai

Module-1 : Computation of gradient directions. Reconstruction of a set of imperfect contour curves which is extracted : Assignment of discrete height to contour curves. from a topographical map is one of the important problems in the field Module-3 : Reconstruction of three-dimensional configurations. of geometrical information processing. This Paper reports a novel 1, order to make our explana...

2007
Martin Heckmann Frank Joublin Christian Goerick

In this paper we propose an algorithm for the robust extraction of pitch combining both temporal (rate) and pattern matching (place) techniques. Following a transformation into the spectral domain via the application of a Gammatone filter bank the rate information is extracted in each band via the zero crossing distances in that band. Next a comb filter with teeth at the harmonics of the curren...

2012
Manzoor Ahmed

The proposed method involves Zero order derivative and First order derivative spectroscopy method. A novel, simple and rapid UV Spectrophotometric determination method for Simultaneous estimation of Triamterene and Benzthiazide was successfully developed and validated in bulk and pharmaceutical formulation. First method is zero order derivative method where the solutions were scanned in the ran...

Journal: :The Journal of the Acoustical Society of America 1953

2011
Vaishali Nandedkar

Content Based Audio Retrieval system is very helpful to facilitate users to find the target audio materials. Audio signals are classified into speech, music, several types of environmental sounds and silence based on audio content analysis. The extracted audio features include temporal curves of the average zero-crossing rate, the spectral Centroid, the spectral flux, as well as spectral roll-o...

2007
Ghasem Azemi Ehsan Zandi Laya Mohammadi

In this paper, using a suitable model for the distribution of the incoming waves at the mobile unit antenna (i.e. scattering distribution), two simulators for a typical mobile communication channel with non-isotropic scattering are proposed. In the proposed simulators, the directivity of the incoming waves can be changed quantitatively. These simulators have applications, for instance, in desig...

2003
Noriko Nagata Seiji Inokuchi

We propose a relative estimation method for subjective age, imaged by ourselves, using peoples' facial images and their chronological (real) age. We experimented with a rating scale for facial images which stimulated subjects. The subject evaluated an image as looking older than themselves with uncertainties. Finding the average values of the rating, the zero crossing point in the approximate l...

Journal: :IEEE Trans. Pattern Anal. Mach. Intell. 1993
David J. Fleet Allan D. Jepson

This paper concerns the robustness of local phase information for measuring image velocity and binoc ular disparity It addresses the dependence of phase behaviour on the initial lters as well as the image variations that exist between di erent views of a d scene We are particularly interested in the stabil ity of phase with respect to geometric deformations and its linearity as a function of sp...

Journal: :SIAM J. Scientific Computing 2002
Peter R. Johnston Ramesh M. Gulrajani

Solving discrete ill-posed problems via Tikhonov regularization introduces the problem of determining a regularization parameter. There are several methods available for choosing such a parameter, yet, in general, the uniqueness of this choice is an open question. Two empirical methods for determining a regularization parameter (which appear in the biomedical engineering literature) are the com...

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