大规模视频矩阵切换网络的建构与实现

设计和实现一个可重排无阻塞的大规模视频矩阵切换网络。基于多级互连网络以视频交叉点开关作为基本的交换模块，组成一个三级非对称Ｃｌｏｓ网络。通过路由表法进行路径选择，实现多入多出，可重排无阻塞，低串扰的模拟视频信号切换。与传统的单级频切换结构相比，大大减少了网络中交叉点开关数和交换模块数，简化了交换系统；各信号线互不相连，减少了视频信号的相互串扰，改善了视频切换系统的传输性能。

Construction and Realization of Large Scale Video Frequency Matrix Switching Network

To design and realize a large scale video frequency switching network, which is rearrangeable and nonblocking, taking the video crosspoint switch as the basic switching unit, a three stage nonblocking Clos network was constructed, and the signal route was selected by a route table. The multi channel analog video signals can be transmitted simultaneously without blocking by rearranging the signal route. Comparing with the traditional single stage video switching network, the number of crosspoints and switching units used in the three stage network is reduced substantially and the whole switching system is simplified greatly; because signal line is not connected each other, the crosstalk between video signals is reduced and the transmitting performance of video switching network is improved distinctly.