Free Acoustic and Language Models for Large Vocabulary Continuous Speech Recognition in Swedish

Niklas Vanhainen, Giampiero Salvi

Abstract
This paper presents results for large vocabulary continuous speech recognition (LVCSR) in Swedish. We trained acoustic models on the public domain NST Swedish corpus and made them freely available to the community. The training procedure corresponds to the reference recogniser (RefRec) developed for the SpeechDat databases during the COST249 action. We describe the modifications we made to the procedure in order to train on the NST database, and the language models we created based on the N-gram data available at the Norwegian Language Council. Our tests include medium vocabulary isolated word recognition and LVCSR. Because no previous results are available for LVCSR in Swedish, we use as baseline the performance of the SpeechDat models on the same tasks. We also compare our best results to the ones obtained in similar conditions on resource rich languages such as American English. We tested the acoustic models with HTK and Julius and plan to make them available in CMU Sphinx format as well in the near future. We believe that the free availability of these resources will boost research in speech and language technology in Swedish, even in research groups that do not have resources to develop ASR systems.
Anthology ID:
L14-1278
Volume:
Proceedings of the Ninth International Conference on Language Resources and Evaluation (LREC'14)
Month:
May
Year:
2014
Address:
Reykjavik, Iceland
Editors:
Nicoletta Calzolari, Khalid Choukri, Thierry Declerck, Hrafn Loftsson, Bente Maegaard, Joseph Mariani, Asuncion Moreno, Jan Odijk, Stelios Piperidis
Venue:
LREC
SIG:
Publisher:
European Language Resources Association (ELRA)
Note:
Pages:
388–392
Language:
URL:
http://www.lrec-conf.org/proceedings/lrec2014/pdf/312_Paper.pdf
DOI:
Bibkey:
Cite (ACL):
Niklas Vanhainen and Giampiero Salvi. 2014. Free Acoustic and Language Models for Large Vocabulary Continuous Speech Recognition in Swedish. In Proceedings of the Ninth International Conference on Language Resources and Evaluation (LREC'14), pages 388–392, Reykjavik, Iceland. European Language Resources Association (ELRA).
Cite (Informal):
Free Acoustic and Language Models for Large Vocabulary Continuous Speech Recognition in Swedish (Vanhainen & Salvi, LREC 2014)
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PDF:
http://www.lrec-conf.org/proceedings/lrec2014/pdf/312_Paper.pdf
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