多投影视频播放集群的主动立体显示技术

Active Stereo Display for Video Playback in Multi-Projector Display Cluster

基于多投影的图形显示系统在多个行业中具有广泛的用途,而视频播放是此类系统的主要应用之一。由于视频资源质量快速提升,以及支持主动立体显示技术的投影仪逐渐普及,系统需要能够在集群环境下利用主动立体显示技术播放超高分辨率的视频。在这种情况下,系统的关键点之一是在应用主动立体显示技术时如何进行集群同步,另一个关键点是如何高效地解码超高分辨率的视频资源。设计并实现了一套在集群中应用主动立体技术播放视频的解决方案,结合软件方式与硬件方式为集群进行同步,利用组合视频对象使得多个分块的视频文件在播放时并发解码以提升效率。在实验中实现了多投影视频播放集群的主动立体显示,并通过统计数据验证了并发解码的效率提升。

Graphics display systems based on multi-projectors are widely used in various fields, while video playback is one of its major applications. As the rapid growth of video quality and the wide spread of projectors with active stereo display support, these systems should be able to perform playback on video with ultra-high resolutions using active stereo display under cluster environment. Given this situation, one of the key points of these systems is the synchronization of the cluster using active stereo display, and another key point is the efficient decoding of video clips with ultra-high resolution. Our paper designed and implemented a solution for video playback in a cluster using active stereo display, with cluster synchronization mechanism combining software method and hardware method, and video composition object to improve decoding performances by decoding multiple video files concurrently. In our experiments we achieved active stereo display for video playback in multi-projector display cluster, and statistics of experiment data showed the performance improvement of using concurrent decoding.