基于UDP的图像传输控制参数的自适应算法

研究了基于UDP的图像传输机制及其控制参数的自适应算法.基于UDP的图像传输机制采用两个独立的异步信道(内容信道和控制信道)完成图像的传输,控制信道通过对传输结果进行分析,得到合适的控制参数,系统通过控制参数控制内容信道的传输.根据网络时延、丢包率、连续丢包次数等环境参数的变化,系统自动调整图像的压缩算法、数据包大小和数据重发次数等控制参数,使图像的传输速度和传输质量达到理想状态.试验证明,计算得到的控制参数的最优值与实际测量得到的最优值结果非常接近.

Adaptive Algorithm for Parameters in Image Transmission Based on UDP

An image transmission system based on UDP and an adaptive algorithm for control parameters in the system are researched. The new image transmission system based on UDP transmits an image by two independent asynchronous channels (content channel and control channel). The control channel can get control parameters by analyzing result of transmission. The system controls image transmission in the content channel by the control parameters. The system adjusts the control parameters (such as compressing algorithms, size of data package, times of data re-transmitted, etc.) according to the changes of condition parameters (such as network delay, rate of losing data package, times of losing data package continually, etc.) automatically, so that the speed and quality of image transmission are both satisfied. Tests showed that the optimal value of control parameters calculated by the system is close to that measured by experiments.