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Coding of spatial sound fields

空间声场编码

基本信息

批准号：
286857504
负责人：
Professor Dr.-Ing. Karlheinz Brandenburg
金额：
--
依托单位：
Institut für Medientechnik
依托单位国家：
德国
项目类别：
Research Grants
财政年份：
2015
资助国家：
德国
起止时间：
2014-12-31 至 2020-12-31
项目状态：
已结题

来源：
https://gepris.dfg.de/gepris/projekt/286857504?language=en
关键词：
Coding spatial sound fields

项目摘要

The realization of virtual acoustic environments (VAEs) is a current trend in spatial audio research. VAEs are increasingly used in a wide range of applications, like in movie and music productions, computer games, as well as in medical science. With the processing power of up-to-date PC's and digital signal processing techniques it is possible to render complex virtual worlds in high grades of detail. Especially in three-dimensional applications, this leads to enormous amounts of data which are impractical for real-time signal processing, storage and transmission. In order to reduce the data, the main objective of this research proposal is a parametric coding approach for spherical sound fields. The focus of the experiments is on the binaural auralization of spherical microphone array data for room simulation applications. For coding, the data is evaluated perceptually in listening experiments and further related to the physical properties of the sound field. This way, various perceptual and room acoustical parameters are extracted, which are important for room acoustical quality description. They provide a basis for the parametric representation of the sound field. In the encoder, the multi-channel audio signals are down-mixed to a mono representation which is transmitted to the decoder, together with the parameters as side information. Here, the original scene is reconstructed. In the experiments, various array configurations, rooms, test signals, as well as realistic measurement conditions, like spatial aliasing or microphone noise, are taken into account.

虚拟声环境的实现是当前空间音频研究的一个发展趋势。VAE越来越多地用于广泛的应用，如电影和音乐制作，计算机游戏以及医学科学。随着处理能力的最新的个人电脑和数字信号处理技术，它是可能的，使复杂的虚拟世界在高等级的细节。特别是在三维应用中，这导致了大量的数据，这对于实时信号处理、存储和传输是不切实际的。为了减少数据，本研究建议的主要目标是球形声场的参数编码方法。实验的重点是在双耳可听化的球形麦克风阵列数据的房间模拟应用。对于编码，在收听实验中对数据进行感知评估，并进一步与声场的物理属性相关。这样，各种感知和房间声学参数被提取，这是重要的房间音质描述。它们为声场的参数化表示提供了基础。在编码器中，多声道音频信号被下混为单声道表示，该单声道表示与作为边信息的参数一起被发送到解码器。在这里，原始场景被重建。在实验中，各种阵列配置，房间，测试信号，以及现实的测量条件，如空间混叠或麦克风噪声，被考虑在内。