Development of Speech Understanding System Using Artificial Intelligence Techniques

利用人工智能技术开发语音理解系统

基本信息

批准号：
03044172
负责人：
MIZOGUCHI Riichiro
金额：
--
依托单位：
Osaka University
依托单位国家：
日本
项目类别：
Grant-in-Aid for Overseas Scientific Survey.
财政年份：
1991
资助国家：
日本
起止时间：
1991 至无数据
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-03044172/
关键词：
Speech recognition Speech understanding Language processing Korean speech recognition Expert system 音声対話

项目摘要

The objectives of this research include to build a continuous speech recognition system for Korean speech as well as performing fundamental research for knowledge-based techniques and its applications to speech understanding system. Understanding of continuous speech is generally a tough problem, since acoustic information is unreliable. This requires us to employ not only acoustic information but also linguistic one to disambiguate the acoustic processing. In this international research with a Korean researcher, we discussed the common issues frequently and obtained the possibility of the application of our speech recognition expert system named SPREX to Korean speech recognition. The following are the summary of the research results obtained this year.1) We investigated the characteristics of Korean speech and found several differences : It has about two-times more vowels including semi-vowels and many nasals. So, we extended the mechanism and the knowledge of the SPREX to enable it applicable to Korean speech recognition. Furthermore, we found the front end module in SPREX responsible for describing the trajectory of feature parameters should re-program in order to cope with Korean speech description.2) For preparation to the speech understanding system building, we also investigated the characteristics of Korea language to know the difference between Japanese and it. Based on the investigation, we found no serious difference in designing the language processing subsystem for the speech understanding system, that is, the system we currently develop for Japanese language is applicable to Korean in principle.3) Speech data base plays an important role in speech research, especially in our research on different languages. Although it is just in the elementary stage, we began the investigation of the structure of speech data base for Korean spoken language as well as Japanese.

这项研究的目标包括为韩国语音建立连续的语音识别系统，并对基于知识的技术进行基础研究及其在语音理解系统中的应用。理解连续言语通常是一个棘手的问题，因为声学信息是不可靠的。这不仅要求我们不仅采用声学信息，而且还需要语言信息来消除声学处理。在与韩国研究人员的这项国际研究中，我们经常讨论常见问题，并获得了将我们的语音识别专家系统应用于韩国语音识别的可能性。以下是今年获得的研究结果的摘要。1）我们研究了韩国语音的特征，并发现了几个差异：它有大约两倍的元音，包括半元音和许多鼻腔。因此，我们扩展了SPREX的机制和知识，使其适用于韩国语音识别。此外，我们发现SPREX中的前端模块负责描述特征参数的轨迹，以应对韩国语音描述。2）为了准备对语音理解系统构建的准备，我们还研究了韩国语言的特征，以了解日本人与IT之间的差异。根据调查，我们发现在设计语言理解系统的语言处理子系统方面没有严重的差异，也就是说，我们目前为日语开发的系统原则上适用于韩语。3）语音数据库在语音研究中起着重要的作用，尤其是在我们对不同语言的研究中。尽管它只是在基础阶段，但我们开始调查韩语口语和日语的语音数据库结构。