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Content Provider | IEEE Xplore Digital Library |
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Author | Shenoy, R.R. Seelamantula, C.S. |
Copyright Year | 1991 |
Abstract | We present an analysis of the rate of sign changes in the discrete Fourier spectrum of a sequence. The sign changes of either the real or imaginary parts of the spectrum are considered, and the rate of sign changes is termed as the spectral zero-crossing rate (SZCR). We show that SZCR carries information pertaining to the locations of transients within the temporal observation window. We show duality with temporal zero-crossing rate analysis by expressing the spectrum of a signal as a sum of sinusoids with random phases. This extension leads to spectral-domain iterative filtering approaches to stabilize the spectral zero-crossing rate and to improve upon the location estimates. The localization properties are compared with group-delay-based localization metrics in a stylized signal setting well-known in speech processing literature. We show applications to epoch estimation in voiced speech signals using the SZCR on the integrated linear prediction residue. The performance of the SZCR-based epoch localization technique is competitive with the state-of-the-art epoch estimation techniques that are based on average pitch period. |
Sponsorship | IEEE Signal Processing Society |
Starting Page | 3177 |
Ending Page | 3190 |
Page Count | 14 |
File Size | 2804541 |
File Format | |
ISSN | 1053587X |
Volume Number | 63 |
Issue Number | 12 |
Language | English |
Publisher | Institute of Electrical and Electronics Engineers, Inc. (IEEE) |
Publisher Date | 2015-01-01 |
Publisher Place | U.S.A. |
Access Restriction | One Nation One Subscription (ONOS) |
Rights Holder | Institute of Electrical and Electronics Engineers, Inc. (IEEE) |
Subject Keyword | Transient analysis Correlation Phase modulation Frequency estimation Estimation Speech Gaussian processes epoch estimation Spectral zero-crossing rate random phase modulation temporal centroid transient localization glottal closure instants |
Content Type | Text |
Resource Type | Article |
Subject | Signal Processing Electrical and Electronic Engineering |
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