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Stable Implementation of Zero Frequency Filtering of Speech Signals for Efficient Epoch ExtractionAuthors: Krishna Gurugubelli,Anil Kumar Vuppala Journal: IEEE Signal Processing Letters (link) Volume: 26 Volume Number: 9 Pages: 1310-1314 Date: 2019-09-30 Report no: IIIT/TR/2019/91 AbstractEpochs are the abrupt-closure events in vocal fold vibration during the production of voiced speech. Zero frequency filtering is a simple and effective technique used to estimate the glottal closure instants accurately from the speech signal. However, the zero frequency filter is an unstable system. Hence, it may not be suitable for practical implementation due to the requirements of high precision computation. In this letter, zero-phase zero frequency resonator is proposed as an alternative to zero frequency filter. The proposed approach provides a stable zero-phase response. The experimental results indicate that the performance of the proposed method outperformed the state-of-the-art methods in terms of identification rate 99.17% and provides comparable performance in terms of false alarm rate (0.41%), and identification accuracy (0.28 ms). Full article: pdf Centre for Language Technologies Research Centre |
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