International Workshop on Spoken Language Translation (IWSLT) 2005

Pittsburgh, PA, USA
October 24-25, 2005

The ITC-irst SMT System for IWSLT-2005

Boxing Chen, Roldano Cattoni, Nicola Bertoldi, Mauro Cettolo, Marcello Federico

ITC-irst - Centro per la Ricerca Scientifica e Tecnologica, Povo (Trento), Italy

This paper describes the statistical machine translation system developed at ITC-irst for the evaluation campaign of the International Workshop on Spoken Language Translation 2005. The system exploits two search passes: the first pass is performed by a beam-search decoder which generates an n-best list of translations, the second by a simple re-scoring algorithm. The two passes apply log-linear phrase-based models with an increasing number of feature functions. Runs have been submitted under the supplieddata and manual-transcription conditions for three language pairs: Chinese-to-English, Japanese-to-English and Arabicto- English. Moreover, the Japanese-to-English system has been also employed under the ASR first-best condition. Significant improvements are reported by exploiting alternative word-alignments, and by using novel feature functions in the re-scoring step.

Full Paper    Presentation

Bibliographic reference.  Chen, Boxing / Cattoni, Roldano / Bertoldi, Nicola / Cettolo, Mauro / Federico, Marcello (2005): "The ITC-irst SMT system for IWSLT-2005", In IWSLT-2005, 88-94.