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With the development of multimedia and network technology , IP-based networks , real-time video applications become a hot issue in the field of multimedia communication . Video conferencing, video on demand, video telephony, mobile TV network video applications is gaining in popularity , became a part of people's daily work life . Under these conditions , the paper mainly studies the real-time video communication services for H.264 video streams real-time transmission problems. First, in-depth analysis of the H.264 video compression algorithm , the framework of the H.264 standard structure and key algorithm , and then discuss the SIP, RSVP, RTP and other multimedia communication protocols , eventually using Real-time Transport Protocol (RTP) as the basic transport protocol. On this basis , this paper presents a real-time based on H.264 and RTP transmission scheme and framework design, research applicable to RTP transport H.264 video coding layer (VCL) algorithm and error recovery (ER) technology . In discussing common congestion control algorithm , based on the introduction of packet loss rate based adaptive RTP / RTCP congestion control algorithms. Experiments show that this congestion control algorithm can effectively reflect the network status , reducing the dropout rate and improve the video quality. Finally, in the theoretical research and design , based on the proposed system software design and implementation , system design based on DirectShow technology, using the software method , with high efficiency , versatility features.
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