【作者】 李尘一；

【导师】 高光来；

【作者基本信息】 内蒙古大学 ， 计算机应用技术， 2006， 硕士

【摘要】 语音置信度评估是结合了语音信号处理以及语音辨识的一项技术，本论文研究的目标是建立一个英语语音置信度评估系统，重点在于将标准语音数据的模型与被评测的语音数据相比对评分。 整个系统包含三个部分：语音信号切割、语料验证和语音评分。其中语音信号切割是经由语音辨认技术，依据声学模型的能量门限、图形比对的方法来切割出正确的发音区段。语料验证是将语音信号切割出每个语音的音素时间区段，并与预先训练好的语料发音声学模型当作比较，以验证被测语音的语料内容与指定的测试语料内容的一致性。语音评分为该系统的核心，使用的评分方式是被评测语音与标准语音在特征信号上比较的相似度，评分标准参考三个特征：隐马尔可夫模型对数机率特征、动态时间规整特征、矢量量化特征。针对不同的特征参数设计合理的评分机制，并对三个参数进行加权运算，以建立一个合理的联合评分系统。 基于以上的理论研究，以MATLAB6.5为开发环境，初步实现了系统的设计。试验结果表明该系统的功能达到了预期设计目标。更多还原

【Abstract】 Voice confidence degree assessment is a combination of voice recognition and voice signal processing of a technical, the paper objective of the study is to establish an English voice confidence degree evaluation system that focuses on the standard voice and data modeling software was compared to the voice data rating.The entire system consists of three parts: voice signals cutting, voice content certification rating and voice confidence measures. Which voice signals cutting through voice recognition technology, based on the acoustic model energy threshold, graphics than a way to correct pronunciation sectors. Voice content certification is to voice the voice signal cutting out factors each time zone, and with good pre-training voice content pronunciation acoustic models as compared to the certification gives voice to the designated testing voice content and content consistency. Voice for the rating system core, the scoring method was used with standard software voice signal characteristics of voice in comparison confidence measures, scoring three standard reference features : models in a few words of concealing techniques, and dynamic atmosphere of the time, the vector quantified characteristics. Different characteristics of the design parameters for reasonable scoring mechanism, and three parameters weighted arithmetic to establish a reasonable joint rating system.Based on the above theoretical research to MATLAB6.5 for the development environment, to achieve a preliminary system design. Test results showed that the system functions to the expected design goals.更多还原