一种基于嵌入式平台屏幕内容分享系统的设计与实现

发布时间：2018-11-03 11:19

【摘要】：为了实现多种智能设备之间低带宽高画质的屏幕内容分享,设计了一种基于嵌入式平台大屏幕内容分享系统。该系统由跨平台客户端及基于嵌入式平台的服务器端两部分组成,针对传统屏幕内容分享系统占用带宽大、不适合分享高分辨率视频信息的缺点,提出了一种基于场景识别的码率自适应调整算法,该算法采用H.264编码方式,能够根据网络拥塞状况及当前屏幕的应用场景对H.264码率进行自适应调整,以达到节约带宽、提高画质的目的;另一方面,服务器端基于嵌入式平台,采用多线程并发设计,将视频的接收、解码、显示分线程独立处理,在提高程序的健壮性的同时降低了程序的耦合性。实验结果表明,该系统支持720p高分辨率视频信息共享,具有成本低、占用带宽小、实时性高的优点。
[Abstract]:In order to realize the low bandwidth and high quality screen content sharing between many intelligent devices, a large screen content sharing system based on embedded platform is designed. The system is composed of cross-platform client and server based on embedded platform. The traditional screen content sharing system takes up large bandwidth and is not suitable for sharing high-resolution video information. In this paper, an adaptive rate adjustment algorithm based on scene recognition is proposed. The algorithm adopts H.264 coding method, which adaptively adjusts H.264 bit rate according to the network congestion and the current screen application scene, in order to save bandwidth. The purpose of improving the quality of the picture; On the other hand, the server is based on the embedded platform, using multi-thread concurrent design, the video receiving, decoding, display thread independent processing, while improving the robustness of the program while reducing the coupling of the program. The experimental results show that the system supports 720p high resolution video information sharing and has the advantages of low cost, low bandwidth and high real-time performance.
【作者单位】：电子科技大学中山学院计算机学院;广东工业大学自动化学院;
【基金】：广东省高校优秀青年创新人才培养计划(No.2013LYM0104,No.2013LYM0103) 电子薄膜与集成器件国家重点实验室中山分室开放基金(No.412S0605) 中山市科技计划项目(No.2013A3FC0278,No.2013A3FC0289) 中山市产学研结合项目(No.2013C2FC0014) 电子科技大学中山学院智能系统及应用科研团队建设(No.412YT01)
【分类号】：TN919.81;TP311.52

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