5.1通路环绕声的虚拟重放系统  

Virtual reproducing system for 5.1 channel surround sound

作　　者：谢菠荪[1] 师勇[1] 谢志文[1] 管善群[2] 

机构地区：[1]华南理工大学应用物理系,广州510641 [2]北京邮电大学电信工程学院,北京100876

出　　处：《声学学报》2005年第3期235-241,共7页Acta Acustica

基　　金：教育部优秀青年教师资助计划TCL王牌电子有限公司项目

摘　　要：提出了一种改进的5.1通路环绕声虚拟重放系统及其信号处理方法。首先对5.1通路环绕声的虚拟重放声场进行了分析,指出现有的系统存在听音区域窄、声像位置畸变、重放音色改变等缺陷。在此基础上,通过理论分析提出将一对前方重放扬声器布置缩窄到士±15°、音色均衡的信号处理等措施,可较好地克服现有系统的缺陷,且信号处理也相对简单。心理声学实验验证了理论分析,证明系统可重放出整个前半平面(约±90°)的立体声像。因此所提出的系统及其扬声器布置是适合于电视和多媒体计算机的应用。An improved virtual reproducing system for 5.1 channel surround sound and signal processing algorithm of the system are proposed. Firstly, by analyzing the sound field of virtual reproducing systems for 5.1 ch surround sound, it is proved that there are some defects in current systems, including narrow listening area, sound image direction distortion, timbre change in reproduction etc. Then from theoretical analysis, it is proposed that, by decreasing the separated angle between reproducing loudspeaker pair to ±15° and using signal processing algorithm with timbre equalization, the improved system can get rid of the defects of current systems. Additionally, the signal processing algorithm of improved system is also simple. The results of psychoacoustic experiment verify theoretical analysis, and show that improved system is able to recreate sound image in half of horizontal plane (about ±90° in the front. Finally, the system and its arrangement of loudspeakers are suitable to be used in TV sets or multimedia computers.

关 键 词：5.1通路环绕声 虚拟重放系统 扬声器 音色均衡 信号处理 

分 类 号：TN912.2[电子电信—通信与信息系统]