Synchronous Locating for Multi-View Video Broadcast with Time-Shifted Functionality

The prototype of time-shifted system on multi-view video is proposed for the first time in this paper. Synchronous locating of multi-view video streams is one of the key issues in supporting time-shifted function. In time-shifted system, video streams are forever lasting, the relative time, as the traditional locating index, now is meaningless to clients, as they would never know when the real moment the video stream has play to. We propose to use the Absolute Globe Time (AGT) as locating index. The AGT index is created for each stream at encoding stage respectively. The proposed synchronous capture scheme ensures the multi-view video streams are aligned frame by frame and sharing identical start time. Thus the frames with identical AGT index between multi-view video streams are synchronous captured groups. To locate inner single stream, frame-level seeking is deployed with AGT index, the exact frame is found. Packet-level seeking is launched with both AGT index and sequence number of RTP header, and the right packet is confirmed. With the proposed scheme, locating between multi-view video streams can be done with respective locating of each stream.