Publication Details

Recovery of Rare Words in Lecture Speech

KOMBRINK Stefan, HANNEMANN Mirko, BURGET Lukáš and HEŘMANSKÝ Hynek. Recovery of Rare Words in Lecture Speech. In: Proc. Text, Speech and Dialogue 2010. Brno: Springer Verlag, 2010, pp. 330-337. ISBN 978-3-642-15759-2. ISSN 0302-9743.
Czech title
Obnova řídkých slov v rozpoznávání řeči z přednášek
Type
conference paper
Language
english
Authors
Kombrink Stefan, Dipl.-Inf -Ling (DCGM FIT BUT)
Hannemann Mirko, Dipl.-Ing. (DCGM FIT BUT)
Burget Lukáš, doc. Ing., Ph.D. (DCGM FIT BUT)
Heřmanský Hynek, prof. Ing., Dr.Eng. (DCGM FIT BUT)
URL
Keywords

speech, rare words, recognizer, detect OOV words, sub-words, lectures

Abstract

This paper is on recovery of rare words in lecture speech. We use a hybrid word/sub-word recognizer to detect OOV words occurring in English talks and describe them as sequences of sub-words.

Annotation

The vocabulary used in speech usually consists of two types of words: a limited set of common words, shared across multiple documents, and a virtually unlimited set of rare words, each of which might appear a few times only in particular documents. In most documents, however, these rare words are not seen at all. The first type of words is typically included in the language model of an automatic speech recognizer (ASR) and is thus widely referred to as invocabulary (IV). Words of the second type are missing in the language model and thus are called out-of-vocabulary (OOV). However, these words usually carry important information. We use a hybrid word/sub-word recognizer to detect OOV words occurring in English talks and describe them as sequences of sub-words.We detected about one third of all OOV words, and were able to recover the correct spelling for 26.2% of all detections by using a phoneme-to-grapheme (P2G) conversion trained on the recognition dictionary. By omitting detections corresponding to recovered IV words, we were able to increase the precision of the OOV detection substantially

Published
2010
Pages
330-337
Journal
Lecture Notes in Computer Science, vol. 2010, no. 9, ISSN 0302-9743
Proceedings
Proc. Text, Speech and Dialogue 2010
Conference
13th International Conference on Text, Speech and Dialogue, TSD 2010, Brno, CZ
ISBN
978-3-642-15759-2
Publisher
Springer Verlag
Place
Brno, CZ
BibTeX 
@INPROCEEDINGS{FITPUB9323,
   author = "Stefan Kombrink and Mirko Hannemann and Luk\'{a}\v{s} Burget and Hynek He\v{r}mansk\'{y}",
   title = "Recovery of Rare Words in Lecture Speech",
   pages = "330--337",
   booktitle = "Proc. Text, Speech and Dialogue 2010",
   journal = "Lecture Notes in Computer Science",
   volume = 2010,
   number = 9,
   year = 2010,
   location = "Brno, CZ",
   publisher = "Springer Verlag",
   ISBN = "978-3-642-15759-2",
   ISSN = "0302-9743",
   language = "english",
   url = "https://www.fit.vut.cz/research/publication/9323"
}
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