报告题目：人工耳蜗的信号处理策略 Cochlear implant signal processing strategy
报告时间：2016年1月8日（星期五）下午4:30
报告地点：18号楼二楼报告厅
报告人：孟庆林博士 （ 深圳大学信息工程学院）
主持人：傅秀军教授
欢迎广大师生参加。
物理与光电学院
2016年1月4日
附件：
内容摘要：人工耳蜗是帮助重度以上听力损失者恢复部分听力的装置，全球植入人数已经超过30万。多数植入者可以获得安静环境下获得良好的一对一言语交流能力。但是他们的声音感知效果还与正常听力者有一定差距，例如，在抗噪声和混响的干扰方面，在音乐欣赏、音高辨识、声源定位、环境声音感知等方面。现在临床使用的人工耳蜗信号处理策略大多是基于时域包络的。其中因受到了生理和工程限制，而丢弃了时域精细结构信息。这是过去二十年这个领域一直在试图解决而又未能突破的难题。本次报告将介绍一种我们提出的新的信号处理策略，名为时域限制编码策略。采用了一种新的时域信号表达方法，其中隐式地同时容纳了时域包络和时域精细结构信息。理论和实验表明，该方法有可能提升人工耳蜗的时域精细结构信息表达能力，进而带来声音感知效果的提升。相关论文即将在美国声学学会会刊（JASA）发表。
Cochlear implants (CIs) have restored hearing to more than 300,000 people worldwide as of December 2012. Most of these individuals can understand speech, without visual cues, from a single speaker with familiar speaking styles in quiet environments. However, this artificial electric hearing is still far from satisfactory for speech perception in noisy and reverberant environments, music appreciation, pitch discrimination, sound source localization, and environmental sound reception. Temporal envelope-based signal processing strategies are widely used in cochlear-implant (CI) systems. It is well recognized that the inability to convey temporal fine structure (TFS) in the stimuli limits CI users’ performance, but it is still unclear how to effectively deliver the TFS. A new strategy known as the temporal-limits-encoder (TLE), which employs a novel approach to derive the amplitude modulator to generate the stimuli coded in an interleaved-sampling strategy, has been recently proposed. The TLE modulator contains information related to the original temporal envelope and a slow-varying TFS from the band-signal. There is some potential for improving the representation of TFS with CIs by using a TLE strategy. The TLE paper has been accepted to be published in the Journal of the Acoustical Society of America (JASA).
报告人简介：孟庆林于2008年毕业于哈尔滨工程大学水声工程学院，2013年获得中国科学院声学研究所工学博士学位。2013年9月至今在深圳大学信息工程学院从事博士后研究。他的研究兴趣是人工耳蜗的信号处理和心理生理声学。他一直探索如何提高人工听觉性能，发表期刊论文6篇，会议论文5篇，合作翻译《人工听觉——新视野》一书，正在承担一项中国博士后基金项目。他是中国声学学会会员。
Meng Qinglin received the B.Sc. degree from College of Underwater Acoustics, Harbin Engineering University in 2008 and the Ph.D. degree from Institute of Acoustics, Chinese Academy of Sciences, in 2013. He has been postdoctoral fellow in College of Information Engineering, Shenzhen University, since Sep.2013. His research interests are in cochlear implant signal processing and psychological and physiological acoustics. His research target is to improve the sound perception of the people using auditory prostheses. He has published six journal papers and five conference papers. He translated the book “auditory prostheses – new horizons”. He is undertaking a China Postdoctoral Science Foundation Project. He is a member of the Acoustical Society of China.