Interactive Sound Propagation with Bidirectional Path Tracing
Interactive Sound Propagation with Bidirectional Path Tracing
复制标题
具有双向路径追踪的交互式声音传播
DOI：
10.1145/2980179.2982431
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发表时间：
2016-11-01
影响因子：
6.2
通讯作者：
Zhou, Kun
中科院分区：
文献类型：
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作者：
Cao, Chunxiao;Ren, Zhong;Zhou, Kun
我们引入了双向声音传输 (BST)，这是一种使用多重重要性采样通过双向路径跟踪来模拟声音传播的新算法。我们的方法可以处理具有复杂遮挡的大型虚拟环境中的多个源，并且可以在台式电脑上以交互速率产生合理的声学效果。我们引入了一种基于能量响应的信噪比（SNR）的新指标，并使用该指标来评估基于射线追踪的声学模拟方法的性能。我们的公式利用了时间相干性，即使用前一帧的样本分布来指导当前帧的样本分布。我们证明了我们的示例重新分配算法收敛并在早期和晚期反射之间取得了更好的平衡。我们在不同的基准上评估我们的方法，并证明比先前的几何声学算法有显着的加速。
We introduce Bidirectional Sound Transport (BST), a new algorithm that simulates sound propagation by bidirectional path tracing using multiple importance sampling. Our approach can handle multiple sources in large virtual environments with complex occlusion, and can produce plausible acoustic effects at an interactive rate on a desktop PC. We introduce a new metric based on the signal-to-noise ratio (SNR) of the energy response and use this metric to evaluate the performance of ray-tracing-based acoustic simulation methods. Our formulation exploits temporal coherence in terms of using the resulting sample distribution of the previous frame to guide the sample distribution of the current one. We show that our sample redistribution algorithm converges and better balances between early and late reflections. We evaluate our approach on different benchmarks and demonstrate significant speedup over prior geometric acoustic algorithms.