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即将引入的利用信源和信道编码技术以及调制技术的最新成果实现的交互式视频业务，如视频点播（ＶＯＤ），需要有一个网络平台，用户可通过它进入一些适当的信息源。这种途径之一是利用宽带ＣＡＴＶ网络，本文将详细讨论。为此，需把上行频道作为特别重点内容。
The upcoming introduction of interactive video services such as video on demand (VOD) using source and channel coding techniques and the latest advances in modulation techniques requires an online platform through which users can access some appropriate source of information. One such approach is to use a broadband CATV network, which is discussed in detail in this article. To this end, the need to uplink channel as a special focus.