A simple scheme for enhanced reassignment of the SPWV representation of noisy signals

AT Loza; CN Canagarajah; DR Bull

doi:10.1109/ISPA.2003.1296353

A simple scheme for enhanced reassignment of the SPWV representation of noisy signals

AT Loza
, CN Canagarajah
, DR Bull

Research output: Chapter in Book/Report/Conference proceeding › Conference Contribution (Conference Proceeding)

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Abstract

The reassignment procedure has often been employed to improve readability of some time-frequency representations (TFRs). When processing noisy signals, the problem of sensitivity of the technique to noise is encountered. In this paper, a simple modification of reassignment method is proposed, based on thresholding operation. Specifically, by preventing the reassignment of the distribution coefficients below the noise dependent threshold and replacing them with zeros, the enhanced signatures on the time-frequency plane are obtained. This method is compared with other techniques, such as the reassigned spectrogram (RSP) and the supervised reassigned spectrogram (SRSP). An experimental test of these algorithms as the instantaneous frequency (IF) estimators for a chirp signal have shown that our method improves the accuracy of the estimation for heavy noise.

Translated title of the contribution	A simple scheme for enhanced reassignment of the SPWV representation of noisy signals
Original language	English
Title of host publication	3rd International Symposium on Image and Signal Processing and Analysis (ISPA 2004) Rome, Italy
Publisher	Institute of Electrical and Electronics Engineers (IEEE)
Pages	630 - 633
Number of pages	4
Volume	2
ISBN (Print)	953184061X
DOIs	https://doi.org/10.1109/ISPA.2003.1296353
Publication status	Published - Sept 2003
Event	3rd International Symposium on Image and Signal Processing and Analysis, 2003 - Rome, Italy Duration: 18 Sept 2003 → 20 Sept 2003

Publication series

Name
ISSN (Print)	13301012

Conference

Conference	3rd International Symposium on Image and Signal Processing and Analysis, 2003
Country/Territory	Italy
City	Rome
Period	18/09/03 → 20/09/03

Bibliographical note

Rose publication type: Conference contribution

Sponsorship: This work is supported by AMS UK

Terms of use: Copyright © 2003 IEEE. Reprinted from 3rd International Symposium on Image and Signal Processing and Analysis, 2003 (ISPA 2003).

This material is posted here with permission of the IEEE. Such permission of the IEEE does not in any way imply IEEE endorsement of any of the University of Bristol's products or services. Internal or personal use of this material is permitted. However, permission to reprint/republish this material for advertising or promotional purposes or for creating new collective works for resale or redistribution must be obtained from the IEEE by writing to [email protected].

By choosing to view this document, you agree to all provisions of the copyright laws protecting it.

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Loza IEEE ISPA 2 2003Accepted author manuscript, 271 KB

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title = "A simple scheme for enhanced reassignment of the SPWV representation of noisy signals",

abstract = "The reassignment procedure has often been employed to improve readability of some time-frequency representations (TFRs). When processing noisy signals, the problem of sensitivity of the technique to noise is encountered. In this paper, a simple modification of reassignment method is proposed, based on thresholding operation. Specifically, by preventing the reassignment of the distribution coefficients below the noise dependent threshold and replacing them with zeros, the enhanced signatures on the time-frequency plane are obtained. This method is compared with other techniques, such as the reassigned spectrogram (RSP) and the supervised reassigned spectrogram (SRSP). An experimental test of these algorithms as the instantaneous frequency (IF) estimators for a chirp signal have shown that our method improves the accuracy of the estimation for heavy noise.",

author = "AT Loza and CN Canagarajah and DR Bull",

note = "Rose publication type: Conference contribution Sponsorship: This work is supported by AMS UK Terms of use: Copyright {\textcopyright} 2003 IEEE. Reprinted from 3rd International Symposium on Image and Signal Processing and Analysis, 2003 (ISPA 2003). This material is posted here with permission of the IEEE. Such permission of the IEEE does not in any way imply IEEE endorsement of any of the University of Bristol's products or services. Internal or personal use of this material is permitted. However, permission to reprint/republish this material for advertising or promotional purposes or for creating new collective works for resale or redistribution must be obtained from the IEEE by writing to [email protected]. By choosing to view this document, you agree to all provisions of the copyright laws protecting it. ; 3rd International Symposium on Image and Signal Processing and Analysis, 2003 ; Conference date: 18-09-2003 Through 20-09-2003",

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Loza, AT, Canagarajah, CN & Bull, DR 2003, A simple scheme for enhanced reassignment of the SPWV representation of noisy signals. in 3rd International Symposium on Image and Signal Processing and Analysis (ISPA 2004) Rome, Italy. vol. 2, Institute of Electrical and Electronics Engineers (IEEE), pp. 630 - 633, 3rd International Symposium on Image and Signal Processing and Analysis, 2003, Rome, Italy, 18/09/03. https://doi.org/10.1109/ISPA.2003.1296353

A simple scheme for enhanced reassignment of the SPWV representation of noisy signals. / Loza, AT; Canagarajah, CN; Bull, DR.
3rd International Symposium on Image and Signal Processing and Analysis (ISPA 2004) Rome, Italy. Vol. 2 Institute of Electrical and Electronics Engineers (IEEE), 2003. p. 630 - 633.

Research output: Chapter in Book/Report/Conference proceeding › Conference Contribution (Conference Proceeding)

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N1 - Rose publication type: Conference contribution Sponsorship: This work is supported by AMS UK Terms of use: Copyright © 2003 IEEE. Reprinted from 3rd International Symposium on Image and Signal Processing and Analysis, 2003 (ISPA 2003). This material is posted here with permission of the IEEE. Such permission of the IEEE does not in any way imply IEEE endorsement of any of the University of Bristol's products or services. Internal or personal use of this material is permitted. However, permission to reprint/republish this material for advertising or promotional purposes or for creating new collective works for resale or redistribution must be obtained from the IEEE by writing to [email protected]. By choosing to view this document, you agree to all provisions of the copyright laws protecting it.

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N2 - The reassignment procedure has often been employed to improve readability of some time-frequency representations (TFRs). When processing noisy signals, the problem of sensitivity of the technique to noise is encountered. In this paper, a simple modification of reassignment method is proposed, based on thresholding operation. Specifically, by preventing the reassignment of the distribution coefficients below the noise dependent threshold and replacing them with zeros, the enhanced signatures on the time-frequency plane are obtained. This method is compared with other techniques, such as the reassigned spectrogram (RSP) and the supervised reassigned spectrogram (SRSP). An experimental test of these algorithms as the instantaneous frequency (IF) estimators for a chirp signal have shown that our method improves the accuracy of the estimation for heavy noise.

AB - The reassignment procedure has often been employed to improve readability of some time-frequency representations (TFRs). When processing noisy signals, the problem of sensitivity of the technique to noise is encountered. In this paper, a simple modification of reassignment method is proposed, based on thresholding operation. Specifically, by preventing the reassignment of the distribution coefficients below the noise dependent threshold and replacing them with zeros, the enhanced signatures on the time-frequency plane are obtained. This method is compared with other techniques, such as the reassigned spectrogram (RSP) and the supervised reassigned spectrogram (SRSP). An experimental test of these algorithms as the instantaneous frequency (IF) estimators for a chirp signal have shown that our method improves the accuracy of the estimation for heavy noise.

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ER -

A simple scheme for enhanced reassignment of the SPWV representation of noisy signals

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