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Development of Multi-site Voice Control System for Space Collaboration System

空间协作系统多站点语音控制系统的开发

基本信息

批准号：
11680242
负责人：
ASAI Kikuo
金额：
$ 1.73万
依托单位：
National Institute Of Multimedia Education
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (C)
财政年份：
1999
资助国家：
日本
起止时间：
1999 至 2001
项目状态：
已结题

项目摘要

The research purpose is to develop a voice control system which automatically arranges a voice level, so that one can make smooth discussion in the use of the interuniversity satellite network (SCS). Although most of the audio-visual equipments are automatically controlled with easy operation in the SCS, users had to make the voice level arrangement because of difficulty of the automation. To arrange the voice level of each station keeping balance of the whole system, one solution is considered sharing information on the voice level between stations. Then, we developed a data sharing system in the satellite network, quid studied on the performance implementing it into VSAT stations of the SCS.The developed data sharing system allows us to make a multicast file transfer. To exploit the SCS features, we focused on material transmission during a session, and designed the system with smooth connectivity to the link control system. Signal multiplex function of a CODEC makes it possible to select a link-speed bandwidth. We also investigated on the asymmetric-closed satellite network in order to avoid complexity of dynamic path setting.Recognition of difference between voice and noise is necessary for automatic voice level control that not only suppresses excessive inputs, but also gains small voice to proper level. The measurement of the acoustic environment used in the SCS indicated that threshold setting of the sound level is not enough for voice level arrangement. We studied on the voice level control system that has input-output property with frequency dependency, focusing on frequency property difference between voice and noise.

本研究的目的是开发一种语音控制系统，它能自动设置语音等级，使人们在使用校际卫星网络（SCS）时能顺利地进行讨论。虽然大部分的视听设备都是自动控制的，操作简单，但由于自动化的困难，用户不得不进行语音级别的安排。为了安排每个站的话音电平以保持整个系统的平衡，一种解决方案被考虑为在站之间共享关于话音电平的信息。在此基础上，我们开发了一个卫星网络中的数据共享系统，并对该系统在SCS VSAT站上的实现性能进行了研究，所开发的数据共享系统允许进行多播文件传输。为了利用SCS的功能，我们专注于会话期间的材料传输，并设计了与链路控制系统平滑连接的系统。编解码器的信号多路复用功能使选择链路速度带宽成为可能。为了避免动态路径设置的复杂性，我们还研究了非对称闭合卫星网络。识别语音和噪声之间的差异是自动语音电平控制的必要条件，不仅可以抑制过多的输入，而且可以将小语音增益到适当的电平。通过对声环境的测量表明，设置声级的阈值不足以进行声级设置。针对输入输出具有频率依赖性的语音电平控制系统，重点研究了语音与噪声的频率特性差异。