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Article Dans Une Revue Speech Communication Année : 2014

SMT-Based ASR Domain Adaptation Methods for Under- Resourced Languages: Application to Romanian

Résumé

This study investigates the possibility of using statistical machine translation to create domain-specific language resources. We propose a methodology that aims to create a domain-specific automatic speech recognition (ASR) system for a low-resourced language when in-domain text corpora are available only in a high-resourced language. Several translation scenarios (both unsupervised and semi-supervised) are used to obtain domain-specific textual data. Moreover this paper shows that a small amount of manually post-edited text is enough to develop other natural language processing systems that, in turn, can be used to automatically improve the machine translated text, leading to a significant boost in ASR performance. An in-depth analysis, to explain why and how the machine translated text improves the performance of the domain-specific ASR, is also made at the end of this paper. As bi-products of this core domain-adaptation methodology, this paper also presents the first large vocabulary continuous speech recognition system for Romanian, and introduces a diacritics restoration module to process the Romanian text corpora, as well as an automatic phonetization module needed to extend the Romanian pronunciation dictionary.

Dates et versions

hal-00953643 , version 1 (28-02-2014)

Identifiants

Citer

Horia Cucu, Andi Buzo, Laurent Besacier, Corneliu Burileanu. SMT-Based ASR Domain Adaptation Methods for Under- Resourced Languages: Application to Romanian. Speech Communication, 2014, Processing Under-Resourced Languages, 56, pp.195-212. ⟨10.1016/j.specom.2013.05.003⟩. ⟨hal-00953643⟩
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