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1·The performance of crosstalk canceller is very important in a virtual surround sound system.

串音消除器的性能在虚拟环绕声系统中十分重要。

2·The space sound image orientation principle of human hearing is analyzed. The principle and application of 3d stereo build up technology and virtual surround sound are discussed.

对人类听觉的空间三维声像定位机理做了深入的分析，探讨了三维立体声增强技术、虚拟杜比环绕声重放技术的实现原理，并对其应用前景做了分析。

3·Their proposal is to surround each light aircraft with two concentric, vertical cylinders of airspace that resemble virtual “hockey pucks”.

他们的方法是，在每一架小型飞机周围，以飞机为中心，设想一两个同轴的垂直圆柱体，像两个冰球的形状。

4·An improved virtual reproducing system for 5.1 channel surround sound and signal processing algorithm of the system are proposed.

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。