Improvements in recognition of conversational telephone speech

被引：6
|
作者：
Peskin, B [1 ]
Newman, M [1 ]
McAllaster, D [1 ]
Nagesha, V [1 ]
Richards, H [1 ]
Wegmann, S [1 ]
Hunt, M [1 ]
Gillick, L [1 ]
机构：
[1] Dragon Syst Inc, Newton, MA 02460 USA
来源：
ICASSP '99: 1999 IEEE INTERNATIONAL CONFERENCE ON ACOUSTICS, SPEECH, AND SIGNAL PROCESSING, PROCEEDINGS VOLS I-VI | 1999年
关键词：
D O I：
10.1109/ICASSP.1999.758060
中图分类号：
O42 [声学];
学科分类号：
070206 ; 082403 ;
摘要：
This paper describes recent changes in Dragon's speech recognition system which have markedly improved performance on conversational telephone speech. Key changes include: the conversion to modified PLP-based cepstra from mel-cepstra; the replacement of our usual IMELDA transformation by a new transform using "semi-tied covariance"; a new multi-pass adaptation protocol; probabilities on alternate pronunciations in the lexicon; the addition of word-boundary tags in our acoustic models and the redistribution of model parameters to build fewer output distributions but with more mixture components per model.
引用
收藏
页码：53 / 56
页数：4
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