Spectral equalization in binaural signals represented by order-truncated spherical harmonics.
Spectral equalization in binaural signals represented by order-truncated spherical harmonics.
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由阶次截断球谐函数表示的双耳信号中的频谱均衡。
DOI：
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发表时间：
2017
影响因子：
2.4
通讯作者：
B. Rafaely
中科院分区：
文献类型：
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作者：
Zamir Ben;F. Brinkmann;J. Sheaffer;S. Weinzierl;B. Rafaely
最近已经提出了从球形麦克风阵列记录合成双耳信号。有限的空间分辨率的再现信号，由于顺序有限的再现先前已被调查的感知，显示空间感知的后果，如穷人的源定位和有限的外部化。此外，由于高频处的快速滚降，这种空间阶数限制还对信号的频率内容及其感知音色具有不利影响。在本文中，这种光谱滚降的根本原因进行了数学描述和数值研究。介绍了一种数字滤波器，它均衡了低空间阶信号的频谱，并进行了评估。进行了全面的听力测试，以研究滤波器对再现声音的感知的影响。结果表明，建议的滤波器是有益的恢复阶截断双耳信号的音色组成，同时保存，甚至改善，信号的一些空间特性。
The synthesis of binaural signals from spherical microphone array recordings has been recently proposed. The limited spatial resolution of the reproduced signal due to order-limited reproduction has been previously investigated perceptually, showing spatial perception ramifications, such as poor source localization and limited externalization. Furthermore, this spatial order limitation also has a detrimental effect on the frequency content of the signal and its perceived timbre, due to the rapid roll-off at high frequencies. In this paper, the underlying causes of this spectral roll-off are described mathematically and investigated numerically. A digital filter that equalizes the frequency spectrum of a low spatial order signal is introduced and evaluated. A comprehensive listening test was conducted to study the influence of the filter on the perception of the reproduced sound. Results indicate that the suggested filter is beneficial for restoring the timbral composition of order-truncated binaural signals, while conserving, and even improving, some spatial properties of the signal.
影响因子：
2.4
作者：
Hawley, ML;Litovsky, RY;Culling, JF
通讯作者：
Culling, JF