文章摘要
谢菠荪,张林山,管善群,张承云.采用扬声器的虚拟声滤波器简化及其主观评价[J].声学技术,2006,(6):547~554
采用扬声器的虚拟声滤波器简化及其主观评价
Simplification and subjective evaluation of filters for virtual sound using loudspeakers
投稿时间:2006-08-31  修订日期:2006-10-30
DOI:
中文关键词: 虚拟声  环绕声  头相关传输函数  滤波器
英文关键词: virtual sound  surround sound  head-related transfer function (HRTF)  filter
基金项目:This work is supported by National Natural Science Foundation ofChina (1037-4031)
作者单位
谢菠荪 华南理工大学物理科学与技术学院声学研究所, 广州, 510641 
张林山 华南理工大学物理科学与技术学院声学研究所, 广州, 510641 
管善群 北京邮电大学电信工程学院, 北京, 100876 
张承云 广州大学信息与机电工程学院, 广州, 510006 
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中文摘要:
      对用扬声器的5.1通路环绕声虚拟重放系统的滤波器进行了简化,提出通过零极点的抵消可减少滤波器的脉冲响应长度。主观评价实验表明,在48kHz的采样频率下,采用128点(2.7ms)脉冲响应长度的滤波器进行处理可得到理想的主观听觉效果。采用64点(1.3ms)脉冲响应长度的滤波器会导致主观听觉效果略为下降,但实际中仍然可用。因而简化滤波器的脉冲响应长度较传统方法的5到10ms的量级要短,采用简单的FIR滤波器即可实现。
英文摘要:
      The filters of virtual reproduction for 5.1 ch surround sound are simplified, and the method of reducing the impulse response of filters by poles and zeros cancellation is proposed. The results of subjective evaluation experiment show that, at the sampling frequency of 48 kHz, filters with 128 points (2.7 ms) impulse response produce satisfying performances. Filters with 64 points (1.3 ms) impulse response produce a little degraded performance, but in practical they are still usable. Therefore the impulse response of proposed filters are shorter than that of traditional design (5-10 ms), and the resulted filters can be implemented directly by FIR structure in time domain.
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