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Issue:
A Model for Recognition of Isolated Words in Noisy Environments
Author(s):
XU Wen-sheng
,
DAI Bei-qian
,
FANG Shao-wu
,
LI Hui
Pages:
659
-
665
Year:
2000
Issue:
6
Journal:
JOURNAL OF CHINA UNIVERSITY OF SCIENCE AND TECHNOLOGY
Keyword:
连续隐Markov模型
;
人工神经网络
;
噪声鲁棒性
;
语音识别
;
Abstract:
论文提出了一种连续隐Markov模型和BP神经网络相结合的、具有两次辨识过程的抗噪孤立字识别模型.首先以连续隐Markov模型完成语音信号的时序建模并提供一次识别信息;以BP神经网络进行后处理,提取二次识别信息,识别结果由两次识别信息共同决定.实验证明,由于有效地利用了隐Markov模型的强时序信号处理能力和BP神经网络的强模式分类和泛化性能,这种识别模型明显地改善了孤立字识别系统的抗噪性能.
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