Capturing and Reproducing Spatial Audio Based on a Circular Microphone Array
Capturing and Reproducing Spatial Audio Based on a Circular Microphone Array
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基于圆形麦克风阵列捕获和再现空间音频
DOI：
10.1155/2013/718574
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发表时间：
2013
期刊：
影响因子：
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通讯作者：
A. Mouchtaris
中科院分区：
文献类型：
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作者：
Anastasios Alexandridis;Anthony Griffin;A. Mouchtaris
提出了一种基于圆形麦克风阵列的空间音频实时采集与再现方法。与最近提出的基于阵列的空间音频方法不同，该方法在每个时间帧的基础上估计活动声源的到达方向，并使用固定的超定向波束形成器执行源分离，从而更准确地模拟和再现所记录的声学环境。分离的源信号被下混合成单声道音频信号，该音频信号与辅助信息一起被发送到再现侧。可以使用耳机或任意的扬声器配置进行复制。通过对模拟和真实麦克风阵列录音的一系列收听测试，将该方法与最近提出的其他基于阵列的空间音频方法进行了比较。听力测试中考虑同时使用扬声器和耳机进行复制。实验结果表明，该方法具有良好的空间化效果和良好的音质。
This paper proposes a real-time method for capturing and reproducing spatial audio based on a circular microphone array. Following a different approach than other recently proposed array-based methods for spatial audio, the proposed method estimates the directions of arrival of the active sound sources on a per time-frame basis and performs source separation with a fixed superdirective beamformer, which results in more accurate modelling and reproduction of the recorded acoustic environment. The separated source signals are downmixed into onemonophonic audio signal, which, along with side information, is transmitted to the reproduction side. Reproduction is possible using either headphones or an arbitrary loudspeaker configuration. The method is compared with other recently proposed array-based spatial audio methods through a series of listening tests for both simulated and real microphone array recordings. Reproduction using both loudspeakers and headphones is considered in the listening tests. As the results indicate, the proposed method achieves excellent spatialization and sound quality.