The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Dec. 15, 2009
Filed:
Apr. 28, 2008
Mehryar Mohri, New York, NY (US);
Mehryar Mohri, New York, NY (US);
AT&T Intellectual Property II, L.P., New York, NY (US);
Abstract
An improved ε-removal method is disclosed that computes for any input weighted automaton A with ε-transitions an equivalent weighted automaton B with no ε-transitions. The method comprises two main steps. The first step comprises computing for each state 'p' of the automaton A its ε-closure. The second step in the method comprises modifying the outgoing transitions of each state 'p' by removing those labeled with ε. The method next comprises adding to the set of transitions leaving the state “p” non-ε-transitions leaving each state “q” in the set of states reachable from “p” via a path labeled with ε with their weights pre-{circle around (x)}multiplied by the ε-distance from state “p” to state “q” in the automaton A. State “p” is a final state if some state “q” within the set of states reachable from “p” via a path labeled with ε is final and the final weight