نتایج جستجو برای: tone filter bank
تعداد نتایج: 211323 فیلتر نتایج به سال:
In the companion paper, we proposed a concept of signal matched whitening filter bank and developed a time and order recursive, fast least squares algorithm for the same. Objective of part II of the paper is two fold: first is to define a concept of signal matched synthesis filter bank, hence combining definitions of part I and part II we obtain a filter bank matched to a given signal. We also ...
In this paper, a novel filter bank approach is presented in order to improve clutter filtering performance in ultrasound color flow imaging. In ultrasound imaging, clutter signals are characterized as the ones with low frequencies and large energies, which is quite qualitative but not quantitative. So, it is not easy to design a fixed optimal filter to handle general situations. In this paper, ...
In this paper, we are motivated by the quantization of filter coefficients in the wavelet transform for image compression. First, filter coefficients are quantized in coefficient level which is based on fixed point representation. However, if coefficients are quantized, this change affects filter properties. Thus, a genetic algorithm based approach for filter coefficient quantization preserving...
This paper addresses the use of multirate filter banks in the context of error-correction coding. An in-depth study of these filter banks is presented, motivated by earlier results and applications based on the filter bank representation of Reed-Solomon (RS) codes, such as Soft-In Soft-Out RS-decoding or RS-OFDM. The specific structure of the filter banks (critical subsampling) is an important ...
Moving weather systems will have a nonzero Doppler response at rate at which the rain droplets are approaching the radar system. The complete data the radar collects contain the returns of both the target and the clutter. The signal processing block in a radar system uses filtering operations to extract the target information while suppressing the clutter. Typically the filters are designed bas...
A brief survey of a paper by Peter Steffen, et al. Introduction G.K. Chesterton, an English author and journalist from the turn of the century, once stated he desired to write a story about a man setting sail from England in search of a new and foreign land. Eventually, when the man reached the island of his destination, he found it to be the most extraordinary and fascinating place. Unbeknowns...
To test if simultaneous spectral and temporal processing is required to extract robust features for automatic speech recognition (ASR), the robust spectro-temporal two-dimensional-Gabor filter bank (GBFB) front-end from Schädler, Meyer, and Kollmeier [J. Acoust. Soc. Am. 131, 4134-4151 (2012)] was de-composed into a spectral one-dimensional-Gabor filter bank and a temporal one-dimensional-Gabor...
Generalized frequency division multiplexing (GFDM) is one of the multicarrier modulation candidates proposed for the 5th generation of wireless networks. Among GFDM linear receivers, GFDM MMSE receiver achieves the best error performance for multipath fading channels at the cost of high numerical complexity. Hence, the combination of GFDM match filter (MF) receiver and double-side successive in...
Pure-tone song is a common and widespread phenomenon in birds. The mechanistic origin of this type of phonation has been the subject of long-standing discussion. Currently, there are three hypotheses. (i) A vibrating valve in the avian vocal organ, the syrinx, generates a multifrequency harmonic source sound, which is filtered to a pure tone by a vocal tract filter ("source-filter" model, analo...
This paper presents a method for classification of Mammographic Microcalcifications using Quadmture Mirror Filter (QMF) bank subband decomposition as a tool for extracting textuml features. The QMF bank splits the input image into four subbands: low-low band, low-high band, high-low band and high-high band, and textural features baaed on eo-occurrence matrices are computed from the subsampled s...
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