During die past decade video delivery service based on the internet has become an integrated part of daily life. With the expansion of 3G cellular coverage and the emergence of more powerful mobile devices,the demand for large amount of scalable mobile video delivery service has increased. During the process of adopting the third screen as main screen for video, solving the problems of low efficiency in the mobile delivery ecosystem and scalability in the mobile delivery infrastructure is one of the study hotspots. Based on the a-nalysis of the current mobile content delivery strategy,propose an improved method of mobile video delivery based on HTTP. This method has good qualities and scalability for mobile videos delivery.%在过去的十年中,基于互联网的视频分发服务已经成为现代日常生活的一部分.3G蜂窝网覆盖范围的扩展以及大量高性能的移动设备的出现,加剧了对于大数据量可扩展移动视频分发业务的需求.采用第三屏幕作为视频主屏幕的方式,解决移动数据分发生态系统中的效率低下问题以及移动数据分发基础设施的可扩展问题已成为研究热点之一.文中在研究当前移动内容分发系统基本策略的基础上,提出了一种基于HTTP协议的改进的移动视频分发方法,有效地提高了移动视频分发系统的服务质量和可扩展性.
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