Abstract
Zero frequency filtering (ZFF) is a well-explored technique for detecting glottal closure instants (GCIs) from the speech signal. The features extracted from the ZFF of the speech signal have also been used for many speech-based applications. Zero frequency resonators used in the infinite impulse response (IIR) realization of ZFF are unstable filters. Consequently, the filter output grows or decays in an unbounded manner. In the finite impulse response (FIR) realization of ZFF, the filter instability problem is address by using more adders and multipliers. In this paper, a simplified stable IIR realization of ZFF (SIIR-ZFF) is proposed for efficient hardware implementation. The SIIR-ZFF requires significantly less hardware than the earlier reported IIR-ZFF as well as FIR-ZFF. Performance of the proposed approach for the task of detecting GCIs from speech signal is found to be almost equivalent to that of the conventional IIR-ZFF. The hardware architecture for the proposed approach is designed and implemented on FPGA.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.