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Improved method for epoch extraction in high pass filtered speech

Publication Type : Conference Proceedings

Thematic Areas : Center for Computational Engineering and Networking (CEN)

Publisher : IEEE- INDICON 2013

Source : Annual IEEE India Conference, INDICON

Campus : Coimbatore

School : School of Engineering

Center : Computational Engineering and Networking

Department : Center for Computational Engineering and Networking (CEN)

Verified : Yes

Year : 2013

Abstract : The objective of present work is to improve the epoch estimation performance in high pass filtered (HPF) speech using conventional zero frequency filtering (ZFF) approach. The strength of impulse at zero frequency is significantly attenuated in case of HPF speech and hence shows significant degradation in epoch estimation performance by ZFF approach. Since linear prediction (LP) residual of speech is characterized by sharper impulse discontinuities at epochs location compared to speech waveform, the present work uses LP residual of HPF speech for epoch estimation using ZFF method. The Gabor filtering on LP residual is carried out for further increasing strength of impulses at epochs location of LP residual. The epochs location are estimated by ZFF of Gabor filtered LP residual. The performance of proposed method is better compared to that of existing Hilbert envelope based ZFF approach with improved epoch identification accuracy.

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