嵌入式实时视频通信系统设计与关键技术研究

为了解决嵌入式视频通信系统普遍存在的实时性不好,服务质量不可控的问题,论述了嵌入式实时视频通信系统设计以及系统实现过程中若干关键技术问题的解决方案。在TI DM642EVM视频处理平台上设计并实现了一个嵌入式实时视频传输系统。提出应用层服务质量(QoS:Quality of Service)控制机制,实现了网络视频的实时传输。参考IP网络多媒体通信协议H.323框架进行系统控制,采用实时传输协议(Real-Tim eTransport Protocol)进行传输控制和网络状况反馈。实验结果表明,在同等网络条件下,这种QoS控制机制具有较好的视频传输质量,而且具有良好的扩展性。

Key Technology Study and Design of Embedded Real-Time Video Communication System

To resolve the problems existing in embedded real-time video communication system,such as worse real-time performance and uncontrollable quality of service,the design of embedded real-time video communication system and key technology solutions in system implementation are discussed.An embedded real-time video communication system on TI DM642EVM video processing platform is implemented.QoS(Quality of Service) control mechanism in application layer is proposed,and real-time video transmission is realized.H.323 protocol framework is adopted for system control and RTP(Real-Time Transport Protocol) protocol is used for transmission control and network status feedback.It has already been proved that better QoS can be gotten under the same network condition.It also shows good scalability and suitability.