Abstract: Currently, TCP is the dominant transport protocol in the Internet However, More and more non TCP streams emerge in the IP network with the development of the application of audio/video, aggravating congestion of Internet and starvation of TCP stream This paper is concerned with MIMD（ a,b ） algorithm, limitation of TFRC algorithm and computation of Rtt and so on, and an adaptive transmission control algorithm of the real time video stream（AVTC） is proposed With the AVTC mechanism, the sender gains the information about link from receiver, then estimates the appropriate sending rate according to the feedback and replaces the current sending rate with it With AVTC, real time video streams can be satisfied with the order of real time transporting and fairness of sharing the available bandwidth with TCP streams