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Compact loudspeaker arrays for 3D sound reproduction

用于 3D 声音再现的紧凑型扬声器阵列

基本信息

批准号：
1786079
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：
2016
资助国家：
英国
起止时间：
2016 至无数据
项目状态：
已结题

来源：
https://gtr.ukri.org/projects?ref=studentship-1786079
关键词：
Compact loudspeaker arrays 3D sound

项目摘要

Loudspeaker arrays are a hot-topic in audio signal processing. Their use for 3D audio and multi-zone audio reproduction has received much attention from both the academic community and industry. The Virtual Acoustics and Audio Engineering team at the ISVR has developed a significant expertise in this field, evidence of which is provided also by the research grants and industrial contracts that have been recently awarded to ISVR (current research budget in this field >£2M). Distributed arrays are widely used for surround-sound reproduction, but compact loudspeaker arrays have recently attracted much industrial interest, especially for their application as sound-bars or accessories for portable devices. ISVR has developed, in conjunction with the University of California, San Diego, a novel technology for near-field 3D audio reproduction using a small (20cm) loudspeaker array. This technology has been licensed to ComHear, a Californian start-up company, which is developing products that implement this technology. The latter is very effective for near-field reproduction (array-listener distance <1m) but it is not yet applicable for soundbars, where the listener is located at a larger distance. The improvement and far-field extension of this 3D audio technology is the objective of this project. This presents a number of interesting research challenges: firstly, the independent control of audio signals delivered to left and right ears of the listener, required for binaural audio delivery, is very hard to achieve when the listener is not close to the array. Furthermore, the listener may not be located directly in front of the array, so the listener must adapt to the listener position. The room reverberation, which does not play a major role for near-field arrays, should also be taken into consideration in this case as it may degrade the system performance. These are some of the challenges that will be faced during research project, the solution of which will require the development of new signal processing strategies and array design solutions. This project is of great interest for ComHear, which has expressed their intention to provide some financial support to this project.

扬声器阵列是音频信号处理领域的一个热点。它们用于3D音频和多区域音频再现已经受到学术界和工业界的广泛关注。ISVR的虚拟声学和音频工程团队在这一领域积累了丰富的专业知识，最近授予ISVR的研究赠款和工业合同也证明了这一点（该领域目前的研究预算> 200万英镑）。分布式阵列广泛用于环绕声再现，但是紧凑的扬声器阵列最近吸引了很多工业兴趣，特别是对于它们作为条形音箱或便携式设备的附件的应用。ISVR与圣地亚哥的加州大学合作开发了一种使用小型（20 cm）扬声器阵列进行近场3D音频再现的新技术。这项技术已被授权给加州初创公司ComHear，该公司正在开发实现这项技术的产品。后者对于近场再现（阵列-收听者距离<1 m）非常有效，但它还不适用于条形音箱，其中收听者位于更大的距离处。该项目的目标是对这种3D音频技术进行改进和远场扩展。这提出了许多有趣的研究挑战：首先，当收听者不靠近阵列时，双耳音频递送所需的递送到收听者的左耳和右耳的音频信号的独立控制是很难实现的。此外，收听者可能不直接位于阵列的前面，因此收听者必须适应收听者的位置。在这种情况下，房间混响，这并不发挥近场阵列的主要作用，也应该考虑到，因为它可能会降低系统的性能。这些是研究项目期间将面临的一些挑战，其解决方案将需要开发新的信号处理策略和阵列设计解决方案。这个项目是非常感兴趣的ComHear，这表示他们打算提供一些财政支持，这个项目。