M. Céu Viana


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The LECTRA Corpus - Classroom Lecture Transcriptions in European Portuguese
Isabel Trancoso | Rui Martins | Helena Moniz | Ana Isabel Mata | M. Céu Viana
Proceedings of the Sixth International Conference on Language Resources and Evaluation (LREC'08)

This paper describes the corpus of university lectures that has been recorded in European Portuguese, and some of the recognition experiments we have done with it. The highly specific topic domain and the spontaneous speech nature of the lectures are two of the most challenging problems. Lexical and language model adaptation proved difficult given the scarcity of domain material in Portuguese, but improvements can be achieved with unsupervised acoustic model adaptation. From the point of view of the study of spontaneous speech characteristics, namely disflluencies, the LECTRA corpus has also proved a very valuable resource.