鼻辅音感知线索研究

Identification of Nasal Consonant Perceptual Cue

语音识别系统的性能受许多因素的影响,如不同的说话人、说话方式、环境噪音等。为了提高系统的识别率和稳定性,一种重要的解决方法是寻找更好的、高强健性的基于人耳听觉感知特性的感知线索。基于此,三维深度研究方法（3DDS）被发明,用来探究语音信号在人耳内部的感知线索,并已成功的运用于对摩擦音和爆破音的感知线索识别。本文将这种方法拓展到鼻辅音的感知线索研究。在三个感知实验结果分析的基础上,定义了冗余感知线索和次要感知线索,并找到了/m/的感知线索是大约位于363~1250 Hz的语音部分,/n/的感知线索是大约位于939~2826 Hz的语音部分。

The performance of a speech recognition system is affected by many factors, such as different speakers, speaking style, ambient noise etc. In order to improve the system＇ s ability to be more accurate and robust despite these factors, one important solution is to look for some better and more robust representations of the acoustic signal based on the principle of human perceptional feature. The human internal acoustic representation has previously been investigated by using the 3-Di- mensional Deep Search （3DDS） method. This method has proven successful in finding perceptual cue of plosive and frica- tive consonants in natural speech. In this paper, the method is extended to predict the perceptual cues for the nasal conso- nants/m, n/. Based on analysis of the results from three experiments, the redundant cue and secondary perceptual cue are defined. The perceptual cue of/m/is speech component lying around from 363 ~ 1250 Hz and the perceptual cue of/m/is speech component lying around from 939 ~ 2826 Hz.