5th European Conference on Speech Communication and Technology

Rhodes, Greece
September 22-25, 1997

What'S in a Word Graph Evaluation and Enhancement of Word Lattices?

Jan W. Amtrup, Henrik Heine, Uwe Jost

University of Hamburg, Computer Science Department, Hamburg, Germany

During the last few years, word graphs have been gaining increasing interest within the speech community as the primary interface between speech recognizers and language processing modules. Both development and evaluation of graph-producing speech decoders require generally accepted measures of word graph quality. While the notion of recognition accuracy can easily be extended to word graphs, a meaningful measure of word graph size has not yet surfaced. We argue, that the number of derivation steps a theoretical parser would need to process all unique subpaths in a graph could provide a measure that is both application oriented enough to be meaningful and general enough to allow a useful comparison of word recognizers across different applications.

Full Paper

Bibliographic reference.  Amtrup, Jan W. / Heine, Henrik / Jost, Uwe (1997): "What's in a word graph evaluation and enhancement of word lattices?", In EUROSPEECH-1997, 2663-2666.