Method for transferring a real-time uncompressed video stream in a network of subscriber stations

摘要

The invention concerns a method of transferring a real-time stream, in particular an uncompressed video stream, in a network of subscriber stations. Furthermore, the invention also relates to a source device for transferring a real-time stream as well as a destination device. More particularly, the invention deals with a method for transferring a real-time uncompressed video stream between a source device S_DEV and a destination device D_DEV connected through a network. The video stream is composed by sequence of video frame VF k , where k is a Video Frame index. According to the invention, the method comprises steps of:
- decomposing video frames VF k into a number N 2 of video sub-frames VSF k,p,q , where N is an integer, and p and q are indexes for identifying video sub-frames, p and q being both comprised between 1 and N;
- arranging video sub-frame VSF k,p,q in payload of RTP packets;
- sending the RTP packets on the network;
- receiving the RTP packets;
- detecting a loss of RTP packet whose payload contains a part of one of the video sub-frame VSF k,p,q ;
- when no packet loss is detected, recomposing transferred video frames V k from payload of received packets;
- when a packet loss is detected, recomposing transferred video frames V k from payload of received packets, payload of lost packet being replaced by interpolations of payloads of received packets.