摘要
针对跨设备视频会议应用中移动设备屏幕的尺寸小和质量低,可用带宽和处理功率低的问题,提出了一种基于Flash动画的自适应多媒体流方案。首先,设计专门用于各个平台且保留功能的用户交互系统,从而克服设备空间中的存储碎片;然后,设计了一种可以单独影响各个终端所显示视频质量的算法;最后,通过结合网络质量检测、视频混合及转码多点控制单元,台式机、平板电脑和移动客户端得到了很好地应用。实验测量了示教器中服务器CPU和内存消耗,分析了不同种类设备连接系统中服务器正测量消耗带宽的输入和输出通量,结果表明了本文方案的有效性及可靠性。
For the issue that mobile screen size is small and quality is poor and the available bandwidth and processing power is low in video conference application crossing devices, an adaptive multimedia streams schema based on Flash animation is proposed. Firstly, user interaction system specifically for each platform and retains the function is designed so as to overcoming the storage equipment space debris. Then, an algorithm which can sepa- rately influence video quality of different terminal display is designed. Finally, desktop, tablet and mobile clients can be applied well by combining network quality detection and the use of a multipoint control unit for video mixing and transcoding. Experiments has tested CPU and memory consumption of teaching device server and analyzed in- put and output flux of server measurement consumption bandwidth in connection system of equipment with different types. Experimental results show the effectiveness and reliability of proposed schema.
出处
《科学技术与工程》
北大核心
2014年第31期262-268,共7页
Science Technology and Engineering
基金
国家自然科学基金(61261036)
新疆维吾尔自治区自然科学基金(2010211A08)资助