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arXiv 1502.03162cs.SD
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用于高效直接卷积的稀疏头相关冲激响应

Sparse Head-Related Impulse Response for Efficient Direct Convolution

University of Maryland Institute for Advanced Computer Studies(马里兰大学高级计算机研究所)

Yuancheng Luo, Dmitry N. Zotkin, Ramani Duraiswami

摘要:

头部相关脉冲响应(HRIR)是空间音频合成中使用的主体相关和方向相关滤波器。它们描述了主体的头部、躯干和躯干的散射响应。我们提出了一个结构分解的HRIR到一个产品的非负和Toeplitz矩阵的因式分解是基于一个新的扩展的非负矩阵因式分解算法。结果,HRIR变得可表达为方向无关\emph{resonance}滤波器和方向相关\emph{reflection}滤波器之间的卷积。此外,反射滤波器可以制成具有最小HRIR失真的\emph{sparse}。所描述的因式分解示出为适用于任意源信号的情况下,并允许一个采用时域卷积的计算成本低于使用卷积在频域中。

英文摘要:

Head-related impulse responses (HRIRs) are subject-dependent and direction-dependent filters used in spatial audio synthesis. They describe the scattering response of the head, torso, and pinnae of the subject. We propose a structural factorization of the HRIRs into a product of non-negative and Toeplitz matrices; the factorization is based on a novel extension of a non-negative matrix factorization algorithm. As a result, the HRIR becomes expressible as a convolution between a direction-independent \emph{resonance} filter and a direction-dependent \emph{reflection} filter. Further, the reflection filter can be made \emph{sparse} with minimal HRIR distortion. The described factorization is shown to be applicable to the arbitrary source signal case and allows one to employ time-domain convolution at a computational cost lower than using convolution in the frequency domain.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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