Title :
Improvements in beam search for 10000-word continuous-speech recognition
Author :
Haeb-Umbach, Reinhold ; Ney, Hermann
Author_Institution :
Philips GmbH Forschungslab., Aachen, Germany
fDate :
4/1/1994 12:00:00 AM
Abstract :
The authors describe the improvements in a time-synchronous beam search strategy for a 10000-word continuous-speech recognition task. Basically they introduced two measures, namely a tree organization of the pronunciation lexicon and a novel look-ahead technique at the phoneme level. The experimental tests performed showed that the number of state hypotheses could be reduced from 50000 to 3000, i.e., by a factor of about 17. At the same time, the word error rate did not increase
Keywords :
search problems; speech recognition; continuous-speech recognition; experimental tests; look-ahead technique; phoneme; pronunciation lexicon; state hypotheses; time-synchronous beam search; tree organization; word error; Costs; Decoding; Error analysis; Hidden Markov models; Performance evaluation; Search problems; Space technology; Speech recognition; Testing; Vocabulary;
Journal_Title :
Speech and Audio Processing, IEEE Transactions on
