Look-Ahead Techniques For Improved Beam Search (1996)
| Venue: | IN PROC. OF THE CRIM-FORWISS WORKSHOP |
| Citations: | 3 - 2 self |
BibTeX
@INPROCEEDINGS{Ortmanns96look-aheadtechniques,
author = {S. Ortmanns and H. Ney and A. Eiden and N. Coenen},
title = {Look-Ahead Techniques For Improved Beam Search},
booktitle = {IN PROC. OF THE CRIM-FORWISS WORKSHOP},
year = {1996},
pages = {10--22},
publisher = {}
}
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Abstract
This paper presents two look-ahead techniques for large vocabulary continuous speech recognition. These two techniques, which are referred to as language model look-ahead and phoneme look-ahead, are incorporated into the pruning process of the time-synchronous one-pass beam search algorithm. The search algorithm is based on a tree-organized pronunciation lexicon in connection with a bigram language model. Both look-ahead techniques have been tested on the 20 000-word NAB'94 task (ARPA North American Business Corpus). The recognition experiments show that the combination of bigram language model look-ahead and phoneme look-ahead reduces the size of search space by a factor of about 27 without affecting the word recognition accuracy.
