中文摘要：

提出本地时移数据存储和网络服务器时移数据访问相结合的混合式方法．本地时移功能采用P2P网络电视直播方式获取数据后将其存储到内存缓冲区来实现，可支持视频直播系统的短时移操作．该方法可大大提高用于P2P共享的内存数据的使用价值，在基本不增加任何其他额外的系统开销和传输的情况下，实现电视的时移回放功能．在服务器时移方面，提出切片存储与多级索引方案，在充分保障数据连续性的前提下可实现快速内容搜索与定位．介绍了自行开发的混合型时移网络电视系统的整体架构、关键技术与实现方案，实际系统运行情况证实该技术是可行且高效的．

英文摘要：

Time-shifted is a core function of Internet protocol television system and a very hot research. In this paper, a novel time-shifted method has been presented that can use both local data storage and network server data access. The implementation of local time-shifted function is based on the P2P live streaming for network television to acquire the data stored the buffer zone in memory, which can support the short-length time-shifted operation in P2P live streaming system. This method can greatly improve the data used value in P2P shared memory without any additional costs and transmission payload, by which the time-shifted playback function for live TV has been realized. On the time-shifting server, this paper provided segmentation storage and multilevel index program, which can realize fast search and location for time-shifted content under the premise of continuity of data. This article described the whole structure, key technology and implementation of the program of our hybrid time-shifted network television system. The real operation of the system confirmed that it is feasible and efficient.