摘要： 针对NAT问题和无线视频通信质量容忍度问题，研究丢包率的调节方法。运用STUN解决NAT穿越问题，调用Android NDK做视频数据压缩，并由此设计Android手机平台上的会话初始协议视频通信终端系统。实验结果表明，当数据包在5 KB以内，发包频率在每秒25个~40个时，可将丢包率基本控制在3%以下。
关键词:
NAT设备,
视频通信,
丢包率,
STUN协议,
Android操作系统,
SIP协议,
终端系统
Abstract: Aiming at the problems of NAT and tolerance for wireless video communication quality, this paper studies the adjustment of the packet loss rate. It uses STUN to solve the problem of traversing NAT devices in communication, called Android NDK for compressing video data, and designs a SIP terminal system of video communication on Android platform. Experimental results show that, the packet loss rate can generally be controlled below 3% in transmission when the packet size in less than 5 KB and the frequency of send data packet is 25~40 per second.
Key words:
NAT device,
video communication,
packet loss rate,
STUN protocol,
Android operating system,
SIP protocol,
terminal system
中图分类号:
杨鑫, 沈燕飞, 王毅, 朱珍民. 基于SIP的Android视频通信终端实现[J]. 计算机工程, 2012, 38(14): 220-222.
YANG Xin, CHEN Yan-Fei, WANG Yi, SHU Zhen-Min. Implementation of Android Video Communication Terminal Based on SIP[J]. Computer Engineering, 2012, 38(14): 220-222.