基于甘南拉卜楞寺安全防范系统的语音信号增强技术研究

项目名称： 基于甘南拉卜楞寺安全防范系统的语音信号增强技术研究

项目编号： No.61461024

项目类型： 地区科学基金项目

立项/批准年度： 2015

项目学科： 无线电电子学、电信技术

项目作者： 徐岩

作者单位： 兰州交通大学

项目金额： 43万元

中文摘要： 拉卜楞寺位于甘肃省甘南藏族自治州夏河县，是我国藏传佛教六大寺院之一，是藏传佛教格鲁派最高佛学学府，建有大量的的佛殿和属寺，被誉为世界藏学府，是全国重点文物保护单位，本项目在已完成的甘肃省自然基金资助课题语音信号增强算法综合仿真研究的基础上，研究在寺院殿堂内语音信号传感器直接获得的信号在没有源信号任何先验知识可以被利用以及多反射混响条件下的盲源分离并结合语音后处理算法实现语音增强，现有的单一算法很难在这种特有背景下具有较好的主观及客观评价性能。项目主要研究内容包括：⑴盲源分离算法实现多路话音分离；⑵语音后处理算法实现音源移动环境下的自适应噪声滤除；⑶建筑物内混响残留串扰的建模与消除。本研究成果将对复杂环境下多移动源信号实现鲁棒实时分离提供新的理论支持与技术方法，可具体应用于公共建筑物内监听等系统中的多话音辨识，这对于防范藏独势力破坏及维护社会稳定都具有十分重要的意义。

中文关键词： 语音增强；盲源分离；环境补偿；安全防范系统；拉卜楞寺

英文摘要： Labrang monastery in Gansu province which is located in the Gannan Tibetan Autonomous Prefecture, is one of China's six major monasteries of Tibetan Buddhism, is the supreme Buddhist Universities of the Gelug Sect of Tibetan Buddhism which built a large number of Buddha hall and temple, is known as the world Tibetan Universities which is a national key cultural relics protection units. On the basis of the completed natural fund project in gansu province speech signal enhancement algorithm integrated simulation, the project research on speech signals which is directly obtained by signal sensor without any prior knowledge used and more reflect reverberation conditions blind source separation and combination of speech post-processing algorithm to enhance the speech.The present algorithm in this special background is difficult to have a better subjective and objective evaluation of performance. The main research contents including:(1)Blind source separation algorithm achieve multi-channel speech separation;(2) The speech post-processing algorithm achieve adaptive noise filtering in audio source mobile environment;(3) Model of reverberation residual crosstalk inside the building and estimation. The research results will offer new theory support and technical methods on robust real-time separation for the source signals of multiple mobile under complex environment and will be used specifically in the more speech recognition for Monitoring system of public buildings etc. It has great significance to guard against Tibet independence forces destroyed and maintain social stability.

英文关键词： speech enhancement;blind source separation;environmental compensation;safety and protection system;Labrang Monastery