一种面向多投影显示的全景视频分块编码方法

近年来虚拟现实技术快速发展,全景视频内容生成技术不断进步。内容呈现方面,多投影显示设备可通过集群驱动解决单机性能有限的问题,具有视角广、分辨率高、支持多人参与的优点。针对多投影显示设备的特点,设计并实现了一套全景视频分块编码格式及其相应的转码工具。该格式以现有的JPEG图像序列编码研究为基础,添加对立体全景视频分块编码的支持,实现双分辨率视频流动态适配机制,保证视角变化时视频的流畅播放,并添加非均匀分块编码的支持以针对实际需求定制分块参数,优化播放性能。实验结果表明,该方法可以有效提升多投影显示设备中高分辨率全景视频播放的流畅度。

A TILE-BASED PANORAMIC VIDEO CODING METHOD FOR MULTI-PROJECTOR DISPLAY

With the fast development of virtual reality in recent years,panoramic video generation technology has made continuous progress.In the aspect of content presentation,multi projection display device can solve the problem of the limited performance of a single machine through cluster drive,which has the advantages of wide view angle,high resolution and support for multi-user participation.According to the characteristics of multi-projector display,we designed and implemented a set of tile-based panoramic video coding formats and their corresponding transcoding tools.Based on the existing JPEG image sequence coding research,this format added support for stereo tile-based panoramic video coding,and realized the dynamic adaptation mechanism of dual-resolution video stream to ensure smooth playback of video when the perspective changed.In addition,support for non-uniform block coding was added to customize block parameters for actual needs and optimize playback performance.The experiments show that our method efficiently improves the fluency of high-definition panoramic video playback in multi-projector display devices.