In order to overlap the interrelated information in video of video supervision system, the scheme for a simple and practical character-overlapping device is presented in this paper by analysising the principle of character-overlapping, and at the same time some programmes of MCU are also given. 介绍了一种简单、实用的字符叠加装置的设计方案,给出了本设计中单片机编程的部分源程序,运用字符叠加技术原理,获得社区视频监控系统的视频图象上叠加相关信息。
The simulation results show that when the user is moving in the overlap area where there are several access networks, the proposed scheme can reduce the times of handoff while assuring the users 'QoS. 仿真结果表明,当用户在多个接入网络共同覆盖的小区边界移动时,该机制能降低网络异常排序的发生,从而降低切换次数,保证用户的QoS。