摘要
为了使实时传输的视频流能够自动匹配动态变化的3G网络,随着网络带宽的变化而变化,从而达到降低数据丢失率、流畅传输视频数据的目的,利用RTP协议中的丢包率和时间抖动这两个关键参数,对3G网络的数据传输过程进行大量的实验统计和分析。根据时间抖动的统计规律对其进行数学归一化,同时与丢包率一起来评估3G网络的动态特性,并依此指导TMS320DM365开发平台进行数据流量的自动调节。经测试,该方法能有效地匹配3G网络的有限带宽,实现视频数据的流畅传输。
In order to make the real-time video stream match the 3G network which changes dynamically and vary with changes of the bandwidth, then achieve low data lost rate and fluent data transmission. The study makes use of two crucial parameters packet lost rate and time jitter in the RTP protocol to test and analyze the process of data transmission in the 3G network, normalizes the time jitter by the statistical laws, to evaluate the dynamic characteristic of 3G network with packet lost rate to guide the auto adjustment of data stream on the TMS320DM365 platform. Experiments show that the method can match the limited bandwidth of 3G network and achieve the fluent video data transmission.
出处
《微型机与应用》
2014年第13期52-54,共3页
Microcomputer & Its Applications
