虚拟环境中的低成本实时立体声显示

Low-Cost Real-time Spatial Sound in Virtual Environment

三维的听觉信息在多模态交互与集成的虚拟环境中得到了广泛的应用。以基于HLA平台的装甲兵对抗演示系统为背景,探讨了三维的听觉信息生成和显示问题,根据系统对声音显示节点的要求,研究了扬声器阵列的立体声显示原理、影响人对声音感知的因素、虚拟环境中声音的定位以及声音的距离仿真。基于矢量基幅值相移(VBAP)的方法,提出了在长方体的演示厅空间中建立扬声器阵列的方法,并在系统仿真过程中将虚拟环境中声源分为循环声、非循环声和环境背景声,并对它们的实现和处理过程以及实体可听距离等问题进行了研究。

3D sound information is widely used in multimodal interactive virtual environment. This paper addresses the issues of how to generate and display 3D sound information and how to real - time generate interactive virtual auditory environment for virtual battlefield environment based on HLA via loudspeaker arrays located in a cubic - shaped room. The configuration of loudspeakers and audible distance of entities are studied based on the VBAP method. The requirement of auditory display node and principle of spatial sound display which include factors affecting sound cognition of human beings and position and distance simulation of sound in VE are also discussed. A categorizing and managing method for auditory entities is also proposed.