LREC 2006 - Proceedings sorted by papers

Title	Exploiting Linguistic Knowledge in Language Modeling of Czech Spontaneous Speech
Authors	P. Ircing, J. Hoidekr, J. Psutka
Abstract	In our paper, we present a method for incorporating available linguistic information into a statistical language model that is used in ASR system for transcribing spontaneous speech. We employ the class-based language model paradigm and use the morphological tags as the basis for world-to-class mapping. Since the number of different tags is at least by one order of magnitude lower than the number of words even in the tasks with moderately-sized vocabularies, the tag-based model can be rather robustly estimated using even the relatively small text corpora. Unfortunately, this robustness goes hand in hand with restricted predictive ability of the class-based model. Hence we apply the two-pass recognition strategy, where the first pass is performed with the standard word-based n-gram and the resulting lattices are rescored in the second pass using the aforementioned class-based model. Using this decoding scenario, we have managed to moderately improve the word error rate in the performed ASR experiments.
Keywords	Speech recognition; language modeling; class-based language models
Full paper	Exploiting Linguistic Knowledge in Language Modeling of Czech Spontaneous Speech

Title

Exploiting Linguistic Knowledge in Language Modeling of Czech Spontaneous Speech

Authors

P. Ircing, J. Hoidekr, J. Psutka

Abstract

In our paper, we present a method for incorporating available linguistic information into a statistical language model that is used in ASR system for transcribing spontaneous speech. We employ the class-based language model paradigm and use the morphological tags as the basis for world-to-class mapping. Since the number of different tags is at least by one order of magnitude lower than the number of words even in the tasks with moderately-sized vocabularies, the tag-based model can be rather robustly estimated using even the relatively small text corpora. Unfortunately, this robustness goes hand in hand with restricted predictive ability of the class-based model. Hence we apply the two-pass recognition strategy, where the first pass is performed with the standard word-based n-gram and the resulting lattices are rescored in the second pass using the aforementioned class-based model. Using this decoding scenario, we have managed to moderately improve the word error rate in the performed ASR experiments.

Keywords

Speech recognition; language modeling; class-based language models

Full paper

Exploiting Linguistic Knowledge in Language Modeling of Czech Spontaneous Speech