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(3)电话网上的NVOD系统。其系统结构图与双向有线电视网上的NVOD系统基本相同(参见8期图3),所不同的是接入网不同,电话网NVOD系统就是把“有线电视网”上的“混合光纤同轴电缆网”HFC技术改用ADSC(非对称数字用户线系统)技术即成。 (4)局域网上的NVOD系统。前面介绍的几种系统,都是一种大规模的NVOD应用,而局域网(Internet)则是小型的NVOD系统,NVOD系统也由视频服务器、网络管理、交换网络、客户端等构成。所不同的
(3) Telephone online NVOD system. The system structure diagram and the two-way cable television network NVOD system is basically the same (see Figure 8 Figure 3), the difference is the access network is different, the telephone network NVOD system is the “cable network” on the “hybrid fiber coaxial cable Network ”HFC technology to ADSC (Asymmetric Digital Subscriber Line System) technology Serve. (4) NVOD system on the LAN. Several systems described above are large-scale NVOD applications, while the Internet is a small NVOD system. The NVOD system is also composed of a video server, a network management, a switching network, and a client. Different