Title :
Improved prior SNR estimation for sound enhancement based on DCT
Author :
Zhang, Xuemin ; Jiang, Hang ; Wang, Xiuyan
Author_Institution :
Fac. of Electr. Eng. & Inf. Technol., Changchun Inst. of Technol., Changchun, China
Abstract :
A improved algorithm named MTSNR (Modified TSNR) in DCT domain was proposed in this paper. At the second step in original TSNR with assumption of Gaussian model in the signal, this method used MMSE (Minimum Mean Square Error) technique to estimate the prior SNR at current speech frame. The proposed approach is simple and fast and requires no any prior condition on the gain function of the speech enhancement system. And it can eliminate the drawback of the TSNR method while deep its advantages. Experimental results show that the improved approach has excellent performance under different noise background.
Keywords :
Gaussian processes; least mean squares methods; speech enhancement; DCT; Gaussian model; SNR estimation; minimum mean square error technique; sound enhancement; speech enhancement system; Estimation; Signal processing algorithms; Signal to noise ratio; Speech; Speech enhancement; DD(Decision-Directed) Approach; MMSE (Mini Mean Square Error); Prior SNR (Signal to Noise Ratio); Sound enhancement;
Conference_Titel :
Signal Processing, Communications and Computing (ICSPCC), 2011 IEEE International Conference on
Conference_Location :
Xi´an
Print_ISBN :
978-1-4577-0893-0
DOI :
10.1109/ICSPCC.2011.6061578
