Speed control method in wireless streaming media transmission

Abstract

The invention relates to wireless multimedia communication. In order to alleviate transmission quality shaking caused by an unreliable wireless channel when streaming media is transmitted in the wireless environment, further improve the transmission quality and increase the utilization ratio of the wireless channel. The technical scheme adopted by the invention is as follows: compared with a traditional speed control method, a speed control method in wireless streaming media transmission is characterized by comprising the following steps: obtaining the packet loss rate and business data passing rate parameters by smoothing treatment in a shorter interval; adjusting the streaming media transmission speed based on the parameters and an improved additive increase and multiplicative decrease algorithm, when the channel is in underload, determining the speed amplification by a variable constant additive factor and a constant additive factor determined by the packet loss, and when the channel is in overload, determining the speed reduction range by a variable constant multiplicative factor and a constant reductive factor determined by the packet loss; and setting a speed switching threshold, regarding the speed switching to be effective only when the difference between the current predicting speed and the previous predicting speed exceeds the set threshold. The speed control method in the wireless streaming media transmission is mainly applied to wireless multimedia communication.

Description

technical field [0001] The invention belongs to the technical field of wireless multimedia communication, and relates to a rate control method for guaranteeing service quality of wireless streaming media transmission based on packet loss rate, service data pass rate and an improved AIMD algorithm. Specifically, it relates to a method based on constraint A solver for spatial problems that meets the framework. Background technique [0002] In recent years, with the rapid development of communication technology, network technology, and video codec technology, the service content of network communication has become more colorful. Multimedia communication combined with information transmission such as voice, video, and data has become an inevitable trend in the development of communication services. Among them, multimedia video communication has become a research hotspot due to its characteristics of continuous transmission, large data volume, and high requirements for real-time ...

AI Technical Summary

Problems solved by technology

Since the RR packets in the RTCP protocol are sent at intervals of 5s, this means that the streaming media transmission system can only perform transmission rate control every 5s, which is sufficient for wired transmission with relatively stable channels; however, the bandwidth has time-varying The characteristics of wireless transmission, the control of the transmission rate cannot adapt to the change of the channel

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