Analysis on Network Delay for Temporal Structure Guarantee of Streaming Media
Qiu Han①; Li Yu-feng①②; Wu Jiang-xing①
①National Digital Switching System Engineering & Technological Research Center, Zhengzhou 450002, China; ②Department of Information and Control, Air Defense Command College, Zhengzhou 450052, China
摘要 流媒体同步对端到端时延和时延抖动提出了确定的要求,而终端抖动缓存一方面能消除时延抖动的影响,一方面却增加了端到端时延,流媒体同步保障对网络时延的要求不明确。论文从概率保障流媒体同步的角度,确定了保障流媒体同步的抖动缓存容量范围,提出了流媒体同步网络保障的充分条件,针对基于Internet VoIP(Voice over IP)业务的实际网络测试结果,给出了应用流媒体同步网络保障充分条件进行同步保障评价的应用实例并验证了其正确性。
Abstract:Media synchronization puts forward determinate requirements on end-to-end delay and delay jitter. The jitter buffers at the destination site can eliminate the effect of the delay jitter but increase the end-to-end delay. Then, the requirements of media synchronization guarantee on the network delay are not clear. From the point of view of statistical guarantee, this paper determines the range of the jitter buffer size for guaranteeing media synchronization, provides the sufficient condition for the network to guarantee the media synchronization, presents an synchronization guarantee evaluating examples with the sufficient condition and validates the sufficient condition by the actual network testing results on VoIP(Voice over IP) based on Internet.