中文摘要：

分析了传统虚拟声2扬声器和现有4扬声器重放系统的缺陷，提出了一种改进的4扬声器重放信号处理的方法。实验结果表明，新方法可得到水平面360°内稳定的声像效果，特别是侧向声像效果有明显的改善，该方法可用于多媒体计算机和多通路环绕声的虚拟重放。

英文摘要：

The defects of the traditional virtual sound with two loudspeakers and current virtual sound with four loudspeakers are analyzed. Then a new signal processing algorithm for four loudspeakers reproduction is proposed. Experimental results show that the new algorithm is able to recreate stable 360° sound image in horizontal plane, and able to improve lateral sound image obviously. Therefore the new signal processing algorithm is suitable to be used in multimedia computers and virtual reproduction of multichannel sound.