Abstract—We have proposed the speech enhancement method using the frequency domain adaptive line enhancer, which enables to independently set de-correlation parameters at frequency bins. In the conventional method, we divided the frequency band into four domains and set a de-correlation parameter at each domain. However, the spectral distribution of voices varies depending on gender and/or age differences. In this paper, we propose to adaptively control the de-correlation parameter according to the signal-to-noise ratio at each domain. Moreover, we propose to adjust the frequency width of each domain to a detected pitch (fundamental frequency). Their effectiveness is evaluated in simulations.
—Adaptive line enhancer, de-correlation parameter, frequency domain, speech enhancement.
The authors are with the Graduate School of Engineering, Tottori, 680-8552 Japan (e-mail: firstname.lastname@example.org, M09T3023@faraday.ele.tottori-u.ac.jp, email@example.com).
Cite: Isao Nakanishi, Hironori Namba, and Shigang Li, "Speech Enhancement Based on Frequency Domain ALE with Adaptive De-Correlation Parameters," International Journal of Computer Theory and Engineering
vol. 5, no. 2, pp. 292-297, 2013.