Improvements in recognition of conversational telephone speech
Improvements in recognition of conversational telephone speech
复制标题
会话电话语音识别的改进
DOI：
10.1109/icassp.1999.758060
复制
发表时间：
1999
期刊：
影响因子：
--
通讯作者：
L. Gillick
中科院分区：
文献类型：
--
作者：
B. Peskin;Michael Newman;Don McAllaster;V. Nagesha;H. Richards;S. Wegmann;M. Hunt;L. Gillick
本文介绍了龙的语音识别系统，显着提高了性能的会话电话语音最近的变化。主要变化包括：从mel-cepstra转换到基于改进的感知线性预测（PLP）的cepstra;用使用“半绑定协方差”的新变换替换我们通常的IMELDA变换;新的多通道自适应协议;词典中交替发音的概率;增加字-我们的声学模型中的边界标记和模型参数的重新分配，以构建更少的输出分布，但每个模型具有更多的混合成分。
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 perceptual linear prediction (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.