公开(公告)号：DE602004019131D1

公开(公告)日：2009-03-05

申请号：DE602004019131

申请日：2004-11-09

Applicant: PHILIPS INTELLECTUAL PROPERTY

Inventor： MARTIN SVEN

IPC: G06F17/27 ,  G10L15/18

Abstract: The present invention relates to a method, a system and a computer program product for mapping of semantic tags to phrases within a training corpus of weakly annotated sentences, thereby generating a grammar which can be applied to unknown sentences for the purpose of language understanding. The method is based on a probabilistic estimation that a given phrase is mapped to a semantic tag of a set of candidate semantic tags. The mapping and the generation of the grammar is performed according to a maximum mapping probability of a set of mapping probabilities of the given phrase and the set of candidate semantic tags. In particular, the determination of the mapping probability makes use of an expectation maximization algorithm.