The conventional sub-band methods can improve the recognition accuracy of noisy speech, but degrade that of clean speech.
传统的子带特征方法虽然能提高噪声下的语音识别性能，但通常会使无噪声情况下的识别性能下降。
Speech enhancement tries to extract clean speech signal from original one with noise and improve the SNR of speech signal.
语音增强则从含噪信号中提取干净的语音信号，提高语音信号的信噪比。
MLLR adaptations are conducted to evaluate the performances of the HMM recognizers, which are trained from the clean speech and generated data respectively.
识别试验利用模拟电话语音评估了HMM识别器做MLLR自适应前后的性能。
In order to extract the underlying clean speech signal from the noise speech signal and reduce the noise disturbance to the minimum, speech enhancement is needed.
为了从带噪语音信号中获得尽可能纯净的语音信号，减少噪音的干扰，就需进行语音增强。
Owing to the lack of telephone speech data, this paper proposes a software simulation implementation of converting clean speech sounds into telephone-quality ones.
针对电话语料比较缺乏的问题，提出了一种完全由软件模拟实现由纯净语音向电话质量语音转换的算法。
In this paper, a parallel sub-state hidden Markov model, which integrates the clean speech and noise information, and each state of the model has several parallel sub-states, is presented.
提出了一种平行子状态隐马尔可夫模型用作噪声鲁棒语音识别的声学模型。
The monitor has arranged for over ten students to clean the conference hall for the English speech contest.
班长安排了十多个同学去打扫会议厅，为英语演讲比赛做准备。
We imposes constraints on the glottal wave of enhanced speech during iterative Wiener filtering according as the glottal codebook to ensure glottal wave laid in the clean exciting glottal space.
用该码本对声门波加以规范和约束，使迭代维纳滤波过程中增强语音的激励声门波处干干净语音有效激励声源模式空间内。
Because of these disturbances, the receiving speech signal is not clean and original but the polluted one.
所有这些因素会造成接收到的语音信号并非纯净的原始语音信号，而是受噪声污染的带噪语音信号。
Because of these disturbances, the receiving speech signal is not clean and original but the polluted one.
所有这些因素会造成接收到的语音信号并非纯净的原始语音信号，而是受噪声污染的带噪语音信号。
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