1SERRA J.Image Analysis and Mathematical Morphology[M].New York:Academic Press,1982.
2KIM H -S,HOLMES WH.Spectral Estimation and Speech Analysis Techniques Using Morphological Filters[A].Proceedings of the 10th Australian International Conference on Speech Science & Technology[C].Sydney:Australian Speech Science & Technology Association Inc,2004.
3ZAHORIAN HP,MENG SF.Novel Feature Extraction for Noise Robust ASR Using the AURORA 2 Database[A].Proceedings of 2006 IEEE International Conference on Acoustics,Speech and Signal Processing[C].2006.