华南理工大学学报(自然科学版) ›› 2018, Vol. 46 ›› Issue (8): 130-133,150.doi: 10.3969/j.issn.1000-565X.2018.08.018

• 物理 • 上一篇    下一篇

中垂面谱特征的提取和建模

钟小丽1, 2 刘雪洁   

  1. 1.华南理工大学 物理与光电学院,广东 广州 510640;
    2.广州大学 广东省现代视听信息工程技术研究中心
  • 收稿日期:2017-12-14 修回日期:2018-03-05 出版日期:2018-08-25 发布日期:2018-07-01
  • 通信作者: 钟小丽(1975-),女,博士,教授,主要从事空间听觉与声信号处理研究 E-mail:xlzhong@scut.edu.cn
  • 作者简介:钟小丽(1975-),女,博士,教授,主要从事空间听觉与声信号处理研究
  • 基金资助:
     国家自然科学基金资助项目(11474103);
    广东省现代视听信息工程技术研究中心开放基金资助项目 

Extracting and Modeling of Median-plane Spectral Characteristics

 CHENG Hong1 DENG Huilong1 XU Shanshan2 GAO Yaoli1 WEI Sui   

  1. 1. Key Laboratory of Intelligent Computing and Signal Processing of the Ministry of Education,Anhui University,Hefei 230039, Anhui,China;
    2. Eleven Department,PLA Army Academy of Artillery and Air Defense,Hefei 230031,Anhui,China
  • Received:2017-12-14 Revised:2018-03-05 Online:2018-08-25 Published:2018-07-01
  • Contact: 钟小丽(1975-),女,博士,教授,主要从事空间听觉与声信号处理研究 E-mail:xlzhong@scut.edu.cn
  • About author:钟小丽(1975-),女,博士,教授,主要从事空间听觉与声信号处理研究
  • Supported by:
     Supported by the National Natural Science Foundation of China(11474103)

摘要: 头相关传输函数表征了声源到耳的传输特性,在虚拟声重放及其相关领域具有广泛的应用。针对头相关传输函数的多维特征,提出了基于独立成分分析的中垂面谱特征的提取和建模。计算结果表明:中垂面的平均谱失真随着展开阶数的增加呈逐渐下降的趋势,前六阶独立成分的计权组合可有效表征中垂面谱的主要特征。进一步,采用主观辨别实验验证了模型的听觉有效性。实验结果表明,在±45°的仰角范围中,所提出的中垂面谱模型不会引起听觉感知的畸变。

关键词: 头相关传输函数, 独立成分分析, 中垂面谱, 声重放

Abstract: Head-related transfer functions (HRTFs) reflect the transmission process from sound sources to human ears, and therefore vary with sound source position, individual, and frequency. Aiming to obtain statistically independent information encoded in HRTFs, an extracting and modeling method of median-plane spectral characteristics was proposed on the basis of independent component analyses (ICA). Calculation results indicate that the mean of median-plane spectral distortion gradually decreases with increasing expansion order, and a weighted combination of the preceding six orders components represents the main part of median-plane spectral characteristics. Moreover, a subjective discrimination experiment was carried out. Corresponding results show that no auditory degradation is perceived when the proposed ICA-based median-plane spectral model is used in the elevation range from 45° to ?45°.

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