Accession Number : AD1040150


Title :   Study of Large Data Resources for Multilingual Training and System Porting (Pub Version, Open Access)


Descriptive Note : Journal Article


Corporate Author : Brno University of Technology Brno Czech Republic


Personal Author(s) : Grezl, Frantisek ; Egorova,Ekaterina ; Karafiat,Martin


Full Text : https://apps.dtic.mil/dtic/tr/fulltext/u2/1040150.pdf


Report Date : 03 May 2016


Pagination or Media Count : 8


Abstract : This study investigates the behavior of a feature extraction neural network model trained on a large amount of single language data (source language) on a set of under-resourced target languages. The coverage of the source language acoustic space was changed in two ways: (1) by changing the amount of training data and (2) by altering the level of detail of acoustic units (by changing the triphone clustering). We observe the effect of these changes on the performance on target language in two scenarios: (1) the source-language NNs were used directly, (2) NNs were first ported to target language. The results show that increasing coverage as well as level of detail on the source language improves the target language system performance in both scenarios. For the first one, both source language characteristic have about the same effect. For the second scenario, the amount of data in source language is more important than the level of detail. The possibility to include large data into multilingual training set was also investigated. Our experiments point out possible risk of over-weighting the NNs towards the source language with large data. This degrades the performance on part of the target languages, compared to the setting where the amounts of data per language are balanced.


Descriptors :   natural language computing , computer programming , training , artificial neural networks


Subject Categories : Linguistics
      Computer Programming and Software


Distribution Statement : APPROVED FOR PUBLIC RELEASE