NRC's PORTAGE System for WMT 2007

We present the PORTAGE statistical machine translation system which participated in the shared task of the ACL 2007 Second Workshop on Statistical Machine Translation. The focus of this description is on improvements which were incorporated into the system over the last year. These include adapted language models, phrase table pruning, an IBM1-based decoder feature, and rescoring with posterior probabilities.Nous pr\ue9sentons le syst\ue8me de traduction automatique statistique PORTAGE qui a particip\ue9 \ue0 la t\ue2che partag\ue9e du 2e atelier de l'ACL 2007 sur la TA statistique. Nous mettons l'accent sur les am\ue9liorations qui ont \ue9t\ue9 apport\ue9es au syst\ue8me au cours de la derni\ue8re ann\ue9e, notamment : adaptation des mod\ue8les de langage, \ue9lagage des tables de syntagmes, d\ue9codeur bas\ue9 sur IBM1 et nouvelle \ue9valuation avec probabilit\ue9s post\ue9rieures.NRC publication: Ye