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利用数字信号和网络系统资源开展交互业务,是有线数字电视最具革命意义的特征。开展视频交互服务,运营商必须面对三大问题:★基于电视机的视频交互:允许视频交互服务对象在自己选定的时间、空间欣赏喜爱的节目,就意味着交互接入点遍布家庭各有效居住空间,而且接口与电视终端的距离足够近。★一户多终端(多机顶盒)交互:“整体转换”之后,一户内多机顶盒的交互问题必然出现。★现有网络资源开发利用:随着光纤网络向用户端推进,同轴电缆已成为广电网络的特征和优势,如何最大限度发挥现有资源接入技术,是非常现实的问题。审视有线电视HFC网络资源优势,就有可能发现解决之道。
The use of digital signals and network system resources to carry out interactive business, digital cable TV is the most revolutionary features. To carry out interactive video services, operators must face three major issues: ★ TV-based video interaction: Allow video interactive service objects in their own choice of time and space to enjoy favorite programs, it means that interactive access points throughout the family each Effective living space, and the interface and the television terminal close enough. ★ a multi-terminal (multi-set-top box) interaction: “the overall conversion”, an indoor multi-set-top box interactive issues inevitable. ★ Development and utilization of existing network resources: With the advancing of optical fiber networks to the clients, coaxial cables have become the characteristics and advantages of broadcasting networks. How to maximize the existing resource access technologies is a very real problem. Examining the advantages of cable HFC network resources, it is possible to find a solution.