TITLE:
Joint Noise Reduction and lp-Norm Minimization for Enhancing Time Delay Estimation in Colored Noise
AUTHORS:
Jingxian Tu, Youshen Xia
KEYWORDS:
Time Delay Estimation, Speech Enhancement, Noise Reduction, Subspace
JOURNAL NAME:
Journal of Computer and Communications,
Vol.4 No.3,
March
2,
2016
ABSTRACT: Time delay estimation (TDE) is an important
issue in signal processing. Conventional TDE algorithms are usually efficient
under white noise environments. In this paper, a joint noise reduction and
-norm minimization method is presented to enhance TDE in
colored noise. An improved subspace method for colored noise reduction is first
performed. Then the time delay is estimated by using an
-norm minimization method. Because the clean speech signal
form the noisy signal is well extracted by noise reduction and the
-norm minimization method is robust, the TDE accuracy can be
enhanced. Experiment results confirm that the proposed joint estimation method
obtains more accurate TDE than several conventional algorithms in colored
noise, especially in the case of low signal-to-noise ratio.