Conditions for positivity of an energy operator

Bovik, A; Maragos, P

dc.contributor.author	Bovik, A	en
dc.contributor.author	Maragos, P	en
dc.date.accessioned	2014-03-01T01:42:19Z
dc.date.available	2014-03-01T01:42:19Z
dc.date.issued	1994	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/23771
dc.subject	Continuous Time	en
dc.subject	Discrete Time	en
dc.subject	Necessary and Sufficient Condition	en
dc.title	Conditions for positivity of an energy operator	en
heal.type	journalArticle	en
heal.identifier.primary	10.1109/78.275632	en
heal.identifier.secondary	http://dx.doi.org/10.1109/78.275632	en
heal.publicationDate	1994	en
heal.abstract	The authors present necessary and sufficient conditions such that the output from the Teager-Kaiser (1989) energy operator [s&dot;(t)=ds(t)/dt] Ψc[s(t)]=s&dot;2(t)-s(t)s¨(t) for continuous-time signals s(t) and the output from the corresponding discrete-time energy operator Ψd[s(n)]=s2(n)-s(n+1)s(n-1) be non-negative everywhere. These operators have been shown to be effective for AM and FM demodulation in several useful classes of signals, such as speech and image	en
heal.journalName	IEEE Transactions on Signal Processing	en
dc.identifier.doi	10.1109/78.275632	en