Though wide - band has been used widely , it ' s not wide enough to watch high - quality real - time video . futhermore , wiless communicaton has become a hot technology , it has limited band and unstable communication channel which result in high percentage of errorness in this situation , if people want to watch realtime video , it has high demand that video producer compress the video as small as possible when quality is good enough and receiver have ability of error resilience 另外，无线通信已经成为当前it领域的一个大热点，对无线通信来说，带宽就更加有限，并且传输线路不稳定，错误率高，在这种情况下，如果想通过无线网络在线观看视频，必然需要视频发送端在保证质量的情况下对视频进行尽可能的压缩，同时提供强大的纠错和抗错能力。
It integrates the characteristics of embedded system into the data security technology of cooperative product . safe measures and data encryption technology are applied to ensure that the cooperative product ’ s data is secure in the terminal , the server , the cnc machine tool and transmission lines between them 结合嵌入式终端的软硬件结构特点和外协产品数据的泄密环节,采取在服务器、终端与数控机床以及它们之间的传输线路处采取安全措施和数据加密技术,保证了外协产品的数据安全。
