摘要
基于语音共振峰频率与声道系统的极点存在一一对应的关系,针对语速变化导致语音参数变化的问题,提出了利用语音极点轨迹图探讨不同语速对共振峰影响的方法并进行了实验。实验中利用逆滤波器分别对快慢2种语速的单音节及连接数字语音提取极点并形成语音极点轨迹图。其快慢2种语速下的单音节语音的极点轨迹基本一致;对于数字连接词,比起快速语音,慢速语音的极点轨迹倾向于有更大的动态范围,即共振峰频率在发音过程中经历了更多变化。实验结果表明,对于孤立发音的单音节语音,语速变化对共振峰参数并无显著影响;而对于连接词语音,语速变化对共振峰参数有明显影响,慢速连接词语音的共振峰发生了更多变化。
Based on the corresponding relations between formant frequencies of speech and poles of vocal system,for the changes of speech signal parameters led by changes of speaking rate,a method of investigating the effect of speaking rate on formant frequencies is presented and related experiments are carried out. Using Inverse Filters,poles of both monosyllable and connected digits are extracted at fast and slow speaking rate respectively. For every syllable or connected digits,poles of all frames form a pole-locus plot. The results of experiments indicate that（ 1） pole-locus plots of a monosyllabic speech with different speaking rates are rather similar and（ 2） for connected digital speech,comparing with fast speech,pole-locus plots of slow speech have broader dynamic extent,namely formant frequencies changes much more during uttering. Thus the conclusion is obtained： speaking rate change has no significant effect on formant frequencies of isolated monosyllable speech but very noticeable effect on connected word speech which has much more changes of formant frequencies of slow speech.
出处
《北京信息科技大学学报（自然科学版）》
2015年第5期57-60,共4页
Journal of Beijing Information Science and Technology University
基金
北京市教委科技发展基金项目(KM200410772004)
关键词
语速
语音共振峰
语音参数
逆滤波器
极点轨迹图
speaking rate
speech formant
speech parameter
inverse filter
pole-locus plot
