Dynamic signal combining for distributed microphone systems in car environments
Dynamic signal combining for distributed microphone systems in car environments
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汽车环境中分布式麦克风系统的动态信号组合
DOI：
10.1109/icassp.2011.5947502
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发表时间：
2011
期刊：
影响因子：
--
通讯作者：
Achim Eichentopf
中科院分区：
文献类型：
--
作者：
Timo Matheja;M. Buck;Achim Eichentopf
汽车中的分布式麦克风系统通常为几个扬声器提供专用麦克风，其中每个麦克风以最佳状态捕获期望的语音信号。根据麦克风位置、麦克风类型、背景噪声的种类和扬声器本身，扬声器通道之间的信号质量可能会有很大差异。当将这些信号组合成加权混合时，可能导致令人讨厌的切换伪像。在这篇文章中，提出了一种新的动态信号混频器，它使用频谱预处理来补偿不同的语音信号电平和不同的背景噪声电平和着色。因此，避免了伪像，并且可以在说话者改变时针对各种语音电平和背景噪声频谱实现平滑过渡。
Distributed microphone systems in cars usually provide dedicated microphones for several speakers where each microphone captures the desired speech signal at the best. The signal quality may differ strongly among the speaker channels depending on the microphone position, the microphone type, the kind of background noise, and the speaker himself. When combining these signals to a weighted mix annoying switching artifacts may result. In this contribution a new dynamic signal mixer is presented that uses spectral preprocessing to compensate both for different speech signal levels and for different background noise levels and colorations. Thus, artifacts are avoided and smooth transitions can be achieved for the various speech level and the background noise spectrum at speaker changes.