@patent{rathi@4,
	author={Rathinavelu Chengalvarayan, et al},
	institution={{US6292776}},
	month={September},
	title={Hierarchial subband linear predictive cepstral features for HMM-based speech recognition},
	url={http://www.research.att.com/export/sites/att_labs/people/Chengalvarayan_Rathinavelu/library/patents/US6292776.pdf},
	year=2001,
}