Dynamic VR live streaming over MMT

While virtual reality (VR) videos have attracted significant amount of attention and efforts, the development of VR is still quite challenging. Among the challenges, the need for enormous bandwidth in live streaming hasn't yet been addressed satisfactorily. To tackle this aspect, we propose a 360° VR live streaming system based on MPEG media transport (MMT) to guarantee the delivery of VR video as well as the user experience. Within the proposed scheme, we divide the integrated VR video into multiple partitioned videos, and encode and encapsulate the partitioned videos into different MMT Assets. An MMT signaling message is introduced to indicate the spatial relationship among the partitioned Assets. The server selectively delivers the partitioned Assets that cover the client's current viewport with high bitrate. Meanwhile, other Assets are also delivered with low bitrate to the client for covering the entire view. We compare the bandwidth used by the developed system in delivery and PSNR of the delivered Assets with benchmark approaches in VR streaming.