单通道语音增强算法对汉语语音可懂度影响的研究

考察了当前常用的几种单通道语音增强算法对汉语语音可懂度的影响。受不同类型噪音干扰的语音经过5种单通道语音增强算法的处理后,播放给具有正常听力水平的被试进行听辩,考察增强后语音的可懂度。实验结果表明,语音增强算法并不能改进语音的可懂度水平;通过分析具体的错误原因,发现听辩错误主要来自于音素错误,与声调关系不大;而且,同英文的辨识结果相比,一些增强算法对于中、英文可懂度影响差异显著。

Effects of single-channel speech enhancement algorithms on Chinese Putonghua intelligibility

Recent studies have shown that the state-of-the-art single-channel speech enhancement algorithms can not improve, usually decrease, the English speech intelligibility in most listening conditions. This study investigates the effects of single-channel speech enhancement algorithms on a tonal language intelligibility: Chinese Putonghua. Noisy speeches were processed by five different single-channel speech enhancement algorithms in various conditions and then presented to ten normal hearing listeners for syllables identification. Recognition results of Chinese Putonghua syllables provided by listeners show that the tested speech enhancement algorithms cannot improve the Chinese Putonghua speech intelligibility in the tested listening conditions, which might be partially caused by the "phoneme errors". Moreover, the comparisons of the recognition results for Chinese Putonghua we obtained and those for English got from previous studies indicate that some speech enhancement algorithms yield different effects on Chinese Putonghua and English speech intelligibilities.