Code rate adaptive adjustment system and method applied to cloud fusion platform

Abstract

The invention relates to the technical field of real-time videos, and provides a code rate adaptive adjustment system applied to a cloud fusion platform, which is characterized by comprising a media production unit, a media distribution unit, a media transcoding unit and a media consumption unit, the media distribution unit is electrically connected with the media production unit, the media transcoding unit and the media consumption unit. According to the invention, the media distribution unit can automatically adjust the sending bandwidth according to a bandwidth detection result, the whole process is very fast, the period is very short, and a link can quickly recover to a normal transmission state; the media transcoding unit is used for converting each video source into one path of video multi-description coded code stream at most, so that the consumption of computing resources and network resources in the system is low, and the hardware cost is reduced; and the video multi-description coding has certain packet loss resistance, and the media consumption unit can reconstruct the whole video frame only by receiving one sub-description, so that the video playing fluency can be greatly improved.

Description

technical field [0001] The present invention relates to the technical field of real-time video, in particular to a code rate adaptive adjustment system and method applied to a cloud fusion platform. Background technique [0002] There are many reasons for video packet loss during network transmission, such as software and hardware failures such as network switches, routers, and transmission cables; performance limitations of network switches, routers, and firewalls; network congestion caused by bandwidth limitations. Software and hardware failures usually mean that the available bandwidth is sufficient, which can be solved by using packet loss and retransmission technology. Device performance limitations and network congestion mean that the available bandwidth is insufficient. If the packet loss and retransmission technology is used, the network congestion will be aggravated. The more effective solution is to reduce the sending bit rate. Although it will affect the display q...

AI Technical Summary

Problems solved by technology

[0008] The disadvantage of this solution is that the control signaling sent from the media distribution service to the media transcoding service has a certain delay; the second is that the adjustment of the media transcoding service from the current code rate to the target code rate does not take effect immediately, but a gradual process, so when congestion occurs, it takes a long time for the link to recover to the transmission state without packet loss

[0010] The disadvantage of the simulcast solution is that it consumes the computing resources of the media transcoding service and the network resources of the entire system

The media transcoding service needs to create multiple transcoding sessions for each original video stream, and the transcoding input is computationally intensive, consuming CPU or even GPU resources, and sending back from the media transcoding service to the media distribution service will also double the network usage bandwidth

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