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

页码：53 / 56

页数：4

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