Measurement of Time-Variant Binaural Room Impulse Responses for Data-Based Synthesis of Dynamic Auditory Scenes
Measurement of Time-Variant Binaural Room Impulse Responses for Data-Based Synthesis of Dynamic Auditory Scenes
复制标题
时变双耳房间脉冲响应的测量，用于基于数据的动态听觉场景合成
DOI：
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发表时间：
2014
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通讯作者：
S. Spors
中科院分区：
文献类型：
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作者：
S. Spors
在双耳合成中，通过用一对双耳房间脉冲响应（BRIR）对源信号进行滤波来生成耳信号，所述双耳房间脉冲响应表征从声源到外耳的声学传输[1]。模拟的BRIR用于基于模型的双耳合成，而测量的BRIR用于基于数据的双耳合成。在后一种方法中，BRIR通常在静态实验设置中测量。对于动态场景的可听化，必须对这种静态BRIR进行内插或外插，这在非自由场条件下并不简单。在这项研究中，提出了一种基于数据的动态场景合成的替代方法。动态声学场景由测试信号激发，并且响应由仿真头捕获，如图1所示。通过采用最近提出的系统识别方法，BRIR计算每个时刻。因此，获得了描述动态系统的声学特性的大量BRIR。
In binaural synthesis, the ear signals are generated by filtering the source signal with a pair of binaural room impulse responses (BRIRs) that characterize the acoustic transmissions from a sound source to the outer ears [1]. Simulated BRIRs are used in model-based binaural synthesis, whereas measured BRIRs are used in data-based binaural synthesis. In the latter approach, the BRIRs are usually measured in static experimental setups. For the auralization of dynamic scenes, such static BRIRs have to be interpolated or extrapolated which is not straightforward under non-freefield conditions. In this study, an alternative approach for the data-based synthesis of dynamic scenes is presented. The dynamic acoustic scene is excited by a test signal, and the response is captured by a dummy head, as shown in Fig. 1. By employing a recently proposed system identification method, the BRIRs are computed for every time instant. Thus, a massive number of BRIRs is obtained that describe the acoustic characteristics of the dynamic system.