视频点播系统交互式功能的设计与实现  

Design and implementation of interactive functions in VOD systems

作　　者：高梅[1] 昌玉芳[2] 黄本雄[2] 

机构地区：[1]福建经济管理干部学院业余函授部,福建福州350002 [2]华中科技大学电子与信息工程系,湖北武汉430074

出　　处：《华中科技大学学报（自然科学版）》2006年第10期18-20,共3页Journal of Huazhong University of Science and Technology(Natural Science Edition)

基　　金：福建星网锐捷公司合作项目

摘　　要：针对视频点播系统的交互特性,在使用MPEG标准的基础上,利用空间换效率的思想,建立I帧文件及其索引,进而提出了单道交互式功能的调度模型,实现了类视频录像系统的交互式功能,如快进、快退、暂停、随机读取和恢复播放等.根据IP组播技术的特点,为用户建立专用的类视频录像操作的数据通道提供非单道模式下的数据传输,并利用流的分离与合并技术,给出了流共享机制下实现交互式功能的解决方案.单道交互式功能的测试显示出播放、快进和快退等状态能够进行平滑切换,达到录像机相应操作状态的效果.Interactive features in video on demand （VOD） were considered. I frames and their index were established, based on MPEG streams. A model for interactive unicast managing was proposed to implement interactive functions, such as fast-forward, fast-backward, pause, random access and resume, in video cassette recording - like （VCR-Like） systems. The data channels of VCR-Like opera tions were built specially for users to transport data with non-unicast mode, and a shared video stream scheme for the interactive function was proposed by using technologies of separating and combining streams. The function tests show that play, fast-forward, fast-backward and other functions can be mutually switched smoothly to achieve the results corresponding to the operations states in videos. The interactive scheme for non-unicast mode has the theoretical and practical significance to implementing a VOD system.

关 键 词：视频点播 交互性 视频数字录像 组播 

分 类 号：TP391.4[自动化与计算机技术—计算机应用技术]