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Development of novel signal processing techniques for audio reproduction using loudspeaker arrays

开发用于使用扬声器阵列进行音频再现的新型信号处理技术

基本信息

批准号：
2106106
负责人：
金额：
--
依托单位：
University of Southampton
依托单位国家：
英国
项目类别：
Studentship
财政年份：
2018
资助国家：
英国
起止时间：
2018 至无数据
项目状态：
已结题

来源：
https://gtr.ukri.org/projects?ref=studentship-2106106
关键词：
Development novel signal processing techniques

项目摘要

Array technologies are a "hot" research topic in the field of audio capturing and reproduction. The latest research projects undertaken by the major national and international players in the audio and telecommunication industry (BBC, NHK, France Telecom, Deutsche Telekom, etc.) demonstrate the growing commercial interest in this field. The use of compact transducer arrays for the generation of private listening areas, to be used in conjunction with portable devices is a promising application of this technology. The ISVR has a strong track-record in the development of DSP technologies for 3D audio reproduction with loudspeaker arrays. This is sometimes referred to as "Transaural audio". Whilst significant advances have been achieved recently in this field and the first Transaural audio systems have started to be commercialised, a number of issues are still unresolved and require more fundamental research to be carried out at an academic level. Some of these issues are:- Definition of optimal number of loudspeaker- Reproduction of elevated virtual sources- Reproduction of diffuse fields - Importance of individualised Head Related Transfer Function- Low frequency system instability and optimal size of the array- Spatial aliasing at high frequency and determination of optimal loudspeaker spacing- Reproduction for multiple listeners (2 or more)- System adaptation to environmental conditions (reverberation and background noise)The aim of this PhD project is to analyse these different problems and gain a better understanding of their scientific and industrial relevance. It is then expected that the project will focus on one or two of these aspects and develop novel solutions in terms of array design and signal processing strategies. It is expected that these novel solution will leverage ISVR's in-house expertise in array technology and may also be based on novel DSP approaches (e.g. compressive sensing) and on psychoacoustical principles (in which ISVR has also strong in-house expertise). The research work will involve both theoretical investigation and experimental activity, leveraginbg also the experimental devices and methods developed in course of the S3A project. The improvement of 3D audio reproduction with loudspeaker arrays is a central topic of the S3A EPSRC-supported programme grant, to which this PhD project is associated. The outcomes of this project have significant potential for impact also through the S3A activity, which involves both academic and industrial dissemination of knowledge and technology.

阵列技术是音频捕获和再现领域的一个“热门”研究课题。音频和电信行业主要国内外参与者（BBC、NHK、法国电信、德国电信等）开展的最新研究项目显示出对这一领域日益增长的商业兴趣。使用紧凑的换能器阵列来产生私人听音区域，与便携式设备结合使用，是这种技术的一个有前途的应用。ISVR在开发用于扬声器阵列的3D音频再现的DSP技术方面有着良好的记录。这有时被称为“经耳音频”。虽然最近在这一领域取得了重大进展，第一个跨听觉音频系统已经开始商业化，但仍有一些问题尚未解决，需要在学术层面进行更多的基础研究。其中一些问题是：-扬声器最佳数量的定义-高架虚拟源的再现-扩散场的再现-个性化头部相关传递函数的重要性-低频系统不稳定性和阵列的最佳尺寸-高频空间混叠和最佳扬声器间距的确定-多个听众（2个或更多）的再现-系统适应环境条件（混响和背景噪声）这个博士项目的目的是分析这些不同的问题，并更好地了解它们的科学和工业相关性。然后，预计该项目将侧重于其中的一个或两个方面，并在阵列设计和信号处理策略方面开发新的解决方案。预计这些新的解决方案将利用ISVR在阵列技术方面的内部专业知识，也可能基于新的DSP方法（例如压缩感知）和心理声学原理（其中ISVR也具有强大的内部专业知识）。研究工作将涉及理论研究和实验活动，包括S3 A项目过程中开发的实验装置和方法。扬声器阵列的3D音频再现的改进是S3 A EPSRC支持的项目资助的中心主题，该博士项目与之相关。该项目的成果也有通过S3 A活动产生重大影响的潜力，S3 A活动涉及知识和技术的学术和工业传播。