@article{Tsoukalas1997,
	title = {Low bit-rate speech coding by perceptually optimized noise excitation
	modulation},
	author = {D. Tsoukalas and J. Mourjopoulos and G. Kokkinakis},
	journal = {Signal Processing},
	month = {Jan},
	number = {1},
	pages = {77--89},
	url = {http://www.sciencedirect.com/science/article/B6V18-3SNTM5V-H/1/297b0ff2efb1aa761a490b6115a11134},
	volume = {56},
	year = {1997},
	biburl = {http://www.bibsonomy.org/bibtex/284c321c1307a13dcddda2991ed03001d/smicha},
	keywords = {Speech }
}