---
_id: '11798'
abstract:
- lang: eng
text: 'In a large vocabulary continuous speech recognition task the search for the
"best" (in the maximum-a-posteriori sense) word sequence is the most (computing)
time consuming part of the system. End-of-word hypotheses are created almost every
time frame. With a stochastic language model every lexicon entry is an admissible
successor candidate. By using a "fast match" module which scores the word candidates
according to their acoustic feasibility ahead of the current time frame, the search
cost can be considerably reduced. Only the fraction of the words with favourable
fast match scores will be further processed in the detailed match, where the likelihood
of a segment of acoustics given the word model is computed. We derive a novel
word selection strategy which is "consistent" in the sense that it introduces
no additional decoding errors and which still reduces the search space by a factor
of 2 - 3 compared to standard Viterbi beam search. Giving up the consistency requirement,
pruning strategies can be deduced which further reduce the search effort significantly:
the size of the word startup list is reduced to 2% - 4% of its original size with
a modest increase in error rate by l%-2%.'
author:
- first_name: Reinhold
full_name: Haeb-Umbach, Reinhold
id: '242'
last_name: Haeb-Umbach
- first_name: Hermann
full_name: Ney, Hermann
last_name: Ney
citation:
ama: 'Haeb-Umbach R, Ney H. A Look-Ahead Technique for Large Vocabulary Continuous
Speech Recognition. In: EUROSPEECH, Genova. ; 1991.'
apa: Haeb-Umbach, R., & Ney, H. (1991). A Look-Ahead Technique for Large Vocabulary
Continuous Speech Recognition. In EUROSPEECH, Genova.
bibtex: '@inproceedings{Haeb-Umbach_Ney_1991, title={A Look-Ahead Technique for
Large Vocabulary Continuous Speech Recognition}, booktitle={EUROSPEECH, Genova},
author={Haeb-Umbach, Reinhold and Ney, Hermann}, year={1991} }'
chicago: Haeb-Umbach, Reinhold, and Hermann Ney. “A Look-Ahead Technique for Large
Vocabulary Continuous Speech Recognition.” In EUROSPEECH, Genova, 1991.
ieee: R. Haeb-Umbach and H. Ney, “A Look-Ahead Technique for Large Vocabulary Continuous
Speech Recognition,” in EUROSPEECH, Genova, 1991.
mla: Haeb-Umbach, Reinhold, and Hermann Ney. “A Look-Ahead Technique for Large Vocabulary
Continuous Speech Recognition.” EUROSPEECH, Genova, 1991.
short: 'R. Haeb-Umbach, H. Ney, in: EUROSPEECH, Genova, 1991.'
date_created: 2019-07-12T05:28:28Z
date_updated: 2022-01-06T06:51:08Z
department:
- _id: '54'
language:
- iso: eng
main_file_link:
- open_access: '1'
url: https://groups.uni-paderborn.de/nt/pubs/1991/Eurospeech_1991_Haeb_paper.pdf
oa: '1'
publication: EUROSPEECH, Genova
status: public
title: A Look-Ahead Technique for Large Vocabulary Continuous Speech Recognition
type: conference
user_id: '44006'
year: '1991'
...