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本文从目前数字有线电视发展现状结合三网融合的新形势下对广电提出了双向化要求,在满足人们群众基本收看电视的要求下的同时,大力发展增值业务,提供具有交互功能的双向化机顶盒。但现今市场上绝大多数为单向机顶盒,因此笔者从市场的角度出发,在讨论了现有多种双向改造接入技术的基础上,提出在单向机顶盒上通过将机顶盒RS232接口上的互动电视信令转换成RJ45接口后,经CM或EOC进行回传的方式来实现VOD点播的功能,实现经济效益、社会效益双赢的模式。
This article from the current development status of digital cable combined with the triple play under the new situation of radio and television put forward two-way requirements, to meet the basic needs of the people watching television at the same time, to develop value-added services, providing interactive two-way set-top boxes . However, the vast majority of the market today is a one-way set-top box, so I from the market point of view, in discussing a variety of existing two-way transformation access technology based on the one-way set-top boxes put forward by the set-top box RS232 interface on the interaction TV signaling converted into RJ45 interface, the way through the CM or EOC back to VOD on-demand features to achieve economic and social benefits win-win model.