A Nearly Optimal Fractional Delay Filter Design Using an Asymmetric Window

A Nearly Optimal Fractional Delay Filter Design Using an Asymmetric WindowIn this paper a numerically efficient filter design method suitable for variable fractional delay (VFD) filter implementation is investigated. We propose to use a well known window method with an asymmetric window extracted from optimal filter designed beforehand. As we will demonstrate, such an approach, if additional gain correction is applied, allows for nearly optimal VFD filter design. Thus, the proposed approach combines window method simplicity with performance comparable to that of optimal filters. Efficiency of the presented technique makes it suitable for designing filters with varying delay in real time.

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Gain deficit effect in the fractional delay filter design by the window method

10.1117/12.837314 ◽

2009 ◽

Cited By ~ 3

Author(s):

Maciej Sac ◽

Marek Blok

Keyword(s):

Filter Design ◽

Window Method ◽

Fractional Delay ◽

Fractional Delay Filter

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Novel robust optimal filter design method and new transition band analysis

2013 IEEE International Symposium on Broadband Multimedia Systems and Broadcasting (BMSB) ◽

10.1109/bmsb.2013.6621764 ◽

2013 ◽

Author(s):

Hsiao-Chun Wu

Keyword(s):

Filter Design ◽

Design Method ◽

Optimal Filter ◽

Transition Band ◽

Filter Design Method

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Defect Detection in Patterned Fabrics Using Wavelet Filter

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.756-759.3831 ◽

2013 ◽

Vol 756-759 ◽

pp. 3831-3834 ◽

Cited By ~ 1

Author(s):

Yu Long Ying ◽

Dan Er Chen

Keyword(s):

Defect Detection ◽

Filter Design ◽

Design Method ◽

Texture Features ◽

Optimal Filter ◽

Test Results ◽

Textile Fabrics ◽

Supervised Segmentation ◽

Different Types ◽

Filter Design Method

This paper investigates the problem of automated defect detection for textile fabrics and proposes a new optimal filter design method for solving this problem. Wavelet is used to extract the texture features of textile fabrics. In view of this optimal filter, a news semi-supervised segmentation algorithm is then proposed. The performance of the scheme is evaluated by using a variety of homogeneous textile images with different types of common defects. The test results exhibit accurate defect detection with low false alarm, thus confirming the robustness and effectiveness of the proposed scheme.

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Digital all-pass filter design method based on complex cepstrum

Electronics Letters ◽

10.1049/el:20030463 ◽

2003 ◽

Vol 39 (8) ◽

pp. 695 ◽

Cited By ~ 8

Author(s):

G. Jovanovic-Dolecek ◽

J. Diaz-Carmona

Keyword(s):

Filter Design ◽

Design Method ◽

Pass Filter ◽

Complex Cepstrum ◽

Filter Design Method

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Median Morphological Filter Design Based on the PSO Algorithm

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.128-129.181 ◽

2011 ◽

Vol 128-129 ◽

pp. 181-184

Author(s):

You Lian Zhu ◽

Cheng Huang

Keyword(s):

Filter Design ◽

Design Method ◽

Signal To Noise Ratio ◽

Pso Algorithm ◽

Morphological Operations ◽

Morphological Filter ◽

Signal To Noise ◽

Noise Ratio ◽

The Cost ◽

Filter Design Method

Design of morphological filter greatly depends on morphological operations and structuring elements selection. A filter design method used median closing morphological operation is proposed to enhance the image denoising ability and the PSO algorithm is introduced for structural elements selecting. The method takes the peak value signal-to-noise ratio (PSNR) as the cost function and may adaptively build unit structuring elements with zero square matrix. Experimental results show the proposed method can effectively remove impulse noise from a noisy image, especially from a low signal-to-noise ratio (SNR) image; the noise reduction performance has obvious advantages than the other.

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An analytical filter design method for guided wave phased arrays

Mechanical Systems and Signal Processing ◽

10.1016/j.ymssp.2016.03.021 ◽

2016 ◽

Vol 81 ◽

pp. 433-446 ◽

Cited By ~ 4

Author(s):

Hyu-Sang Kwon ◽

Jin-Yeon Kim

Keyword(s):

Phased Arrays ◽

Filter Design ◽

Design Method ◽

Guided Wave ◽

Filter Design Method

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An Optimal FIR Filter Design Method Using H/W Complexity Estimation

Journal of Broadcast Engineering ◽

10.5909/jeb.2011.16.1.174 ◽

2011 ◽

Vol 16 (1) ◽

pp. 174-177

Author(s):

Rin-Chul Kim

Keyword(s):

Filter Design ◽

Design Method ◽

Fir Filter ◽

Complexity Estimation ◽

Fir Filter Design ◽

Optimal Fir Filter ◽

Filter Design Method

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Variable Ratio Sample Rate Conversion Based on Fractional Delay Filter

Archives of Acoustics ◽

10.2478/aoa-2014-0027 ◽

2015 ◽

Vol 39 (2) ◽

pp. 231-242 ◽

Cited By ~ 1

Author(s):

Marek Blok ◽

Piotr Drózda

Keyword(s):

Speech Signal Processing ◽

Farrow Structure ◽

Conversion Algorithm ◽

Window Method ◽

Voiced Speech ◽

Fractional Delay ◽

Sample Rate ◽

Fractional Delay Filter ◽

Speech Segments ◽

Rate Conversion

Abstract In this paper a sample rate conversion algorithm which allows for continuously changing resampling ratio has been presented. The proposed implementation is based on a variable fractional delay filter which is implemented by means of a Farrow structure. Coefficients of this structure are computed on the basis of fractional delay filters which are designed using the offset window method. The proposed approach allows us to freely change the instantaneous resampling ratio during processing. Using such an algorithm we can simulate recording of audio on magnetic tape with nonuniform velocity as well as remove such distortions. We have demonstrated capabilities of the proposed approach based on the example of speech signal processing with a resampling ratio which was computed on the basis of estimated fundamental frequency of voiced speech segments.

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