P2P (Peer to Peer) stream media live-broadcast low-delay transmission method and system thereof

Abstract

The invention discloses a P2P stream media live-broadcast low-delay transmission method comprising the following steps of: collecting multimedia frames in a multimedia data stream and coding the multimedia frames by multimedia; slicing the coded multimedia frames into multimedia data packets of about 1KB and numbering each sliced multimedia data packet; transmitting the multimedia data packets to each broadcasting node through a live-broadcast network; and receiving the multimedia data packets by the broadcasting nodes, combining the multimedia frame data packets into the multimedia frames and playing the multimedia frames. The invention also discloses a P2P stream media live-broadcast low-delay transmission system comprising a multimedia frame collecting module, a multimedia frame slicing module, a multimedia frame data packet transmission module, a multimedia frame recombination module, and the like. The invention improves transmission efficiency, reduces transmission delay and bandwidth waste and increases data transmission stability.

Description

technical field [0001] The invention relates to the technical field of P2P streaming media live broadcasting, in particular to a low-delay transmission method and system for P2P streaming media live broadcasting. Background technique [0002] Streaming media refers to the multimedia network application in which video and audio data are transmitted from the source node to the target node in the form of sequential flow in order to achieve the characteristics of playing while downloading. Most of the traditional streaming media services adopt the "client / server" (C / S) model. Due to the limitations of server bandwidth and computing power, when the number of users increases significantly, the scalability and stability of the system are severely challenged. [0003] P2P streaming media technology is a streaming media application combined with peer-to-peer network technology (Peer-to-Peer). The main idea is to use the computing power and bandwidth capabilities of terminal devices t...

AI Technical Summary

Problems solved by technology

[0012] In the above process, when the program is released, the Microsoft Media Server technology is used to collect the multimedia, and then the multimedia data is collected and the asf format file is encoded. Due to the limitation of the Microsoft Media Server technology and the size limit of the file slice, this process will be slow. Generate a delay of about 10s to 15s

In the transmission process, it is necessary to receive the 2Mbit file block before continuing to forward it to the neighbor node. There is a local residence time of the file block, and this delay will increase with the increase of the TTL.

In the P2P overlay network using the Gossip protocol, the unstructured mesh network structure and the Pull data acquisition method in the form of Buffer Map exchange will lead to further increase in delay

In addition, when the client uses Microsoft Media Player to play, it needs to receive a complete data block before playing, which will have a certain impact on the startup delay

[0013] To sum up, it can be seen that the traditional P2P streaming media live broadcast system has relatively large defects in live broadcast delay and playback synchronization

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