19 May 2015 Group sparsity based spectrum estimation of harmonic speech signals
Author Affiliations +
Spectrum analysis of speech signals is important for their detection, recognition, and separation. Speech signals are nonstationary with time-varying frequencies which, when analyzed by Fourier analysis over a short time window, exhibit harmonic spectra, i.e., the fundamental frequencies are accompanied by multiple associated harmonic frequencies. With proper modeling, such harmonic signal components can be cast as group sparse and solved using group sparse signal reconstruction methods. In this case, all harmonic components contribute to effective signal detection and fundamental frequency estimation with improved reliability and spectrum resolution. The estimation of the fundamental frequency signature is implemented using the block sparse Bayesian learning technique, which is known to provide high-resolution spectrum estimations. Simulation results confirm the superiority of the proposed technique when compared to the conventional STFT-based methods.
© (2015) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Yimin D. Zhang, Yimin D. Zhang, Ben Wang, Ben Wang, } "Group sparsity based spectrum estimation of harmonic speech signals", Proc. SPIE 9484, Compressive Sensing IV, 94840N (19 May 2015); doi: 10.1117/12.2180327; https://doi.org/10.1117/12.2180327

Back to Top