Localization Uncertainty in Time-Amplitude Stereophonic Reproduction

Localization Uncertainty in Time-Amplitude Stereophonic Reproduction
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时幅立体声再现中的定位不确定性

DOI:
10.1109/taslp.2020.2975419
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发表时间:
2020
期刊:
IEEE/ACM Transactions on Audio, Speech, and Language Processing
影响因子:
--
通讯作者:
De Sena E
De Sena E
中科院分区:
--
文献类型:
--
作者:
De Sena E

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本文研究了立体声再现中声道间的时间和电平差异对感知定位不确定性的影响,感知定位不确定性被定义为收听者分辨声源位置的困难程度。为此,首先提出了一个定位不确定性的计算模型。该模型计算耳间的时间和电平差线索,并将它们与自由场点状源相关联的线索进行比较。比较是使用一个特定的距离功能,复制实验观察到的不确定性增加不一致的耳间时间和水平差异线索。该模型通过正式的听力测试进行验证,达到皮尔逊相关系数为0.99。然后,该模型用于预测立体声设置和听众在中心和偏离中心的位置定位的不确定性。结果表明,振幅方法实现了略低的定位不确定性,为听众定位在甜蜜点的中心。一旦收听者离开该位置,情况就会逆转,时间幅度方法实现了较低的定位不确定性。
This article studies the effects of inter-channel time and level differences in stereophonic reproduction on perceived localization uncertainty, which is defined as how difficult it is for a listener to tell where a sound source is located. Towards this end, a computational model of localization uncertainty is proposed first. The model calculates inter-aural time and level difference cues, and compares them to those associated to free-field point-like sources. The comparison is carried out using a particular distance functional that replicates the increased uncertainty observed experimentally with inconsistent inter-aural time and level difference cues. The model is validated by formal listening tests, achieving a Pearson correlation of 0.99. The model is then used to predict localization uncertainty for stereophonic setups and a listener in central and off-central positions. Results show that amplitude methods achieve a slightly lower localization uncertainty for a listener positioned exactly in the center of the sweet spot. As soon as the listener moves away from that position, the situation reverses, with time-amplitude methods achieving a lower localization uncertainty.
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