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数字电视机顶盒技术及发展趋势分析 总被引:1,自引:0,他引:1
数字电视机顶盒(STB)是扩展电视机功能的一种新型家用电器。它把卫星直播数字电视信号、地面数字电视信号、有线数字电视信号甚至互联网的数字信号转换成模拟电视机可以接收的信号,使观众可以在现存模拟电视机上观看数字电视节目,进行交互式数字化娱乐、教育和商业活动。本文首先描述了数字电视机顶盒的硬件结构和软件系统。然后在此基础上对数字机顶盒的应用和未来的发展趋势做简单分析。 相似文献
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IPTV承载网接入认证方案对比 总被引:1,自引:0,他引:1
IPTV即交互式网络电视,是一种利用宽带网络,采用DSL或以太网等接入方式.通过网络机顶盒(STB,Set-Top Box)或PC向用户提供多种交互式的宽带视频业务.包括视频直播、视频点播、游戏、视频会议等业务。 相似文献
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针对现用有线数字电视机顶盒按一户一台配置,仅输出一路信号,不能满足一户有多台模拟/HDTV电视机使用需求的问题,拟定了基于模拟/HDTV电视机多路信号处理、多台高清晰度数字(HDTV)电视机射频信号处理和无线传输信号处理的3个设计方案.并对整机设计思路、结构、工作原理、特点和实现途径等进行了简要阐述,为有线数字电视机顶盒的推陈出新提供了思路. 相似文献
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针对机顶盒的开发,在以往机顶盒软件基础之上提出在机顶盒环境中实现基于窗口消息传递的通用GUI的方案,它具有跨平台、可移植、可配置等特性。详细叙述了实现整个方案所做的工作。通过在ST平台和CONEXANT平台上的应用,很好地验证了该方案的可行性。 相似文献
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实现高清数字电视机顶盒的交互式功能,首先要实现其图形显示功能,介绍了在机顶盒7710上GDP图形显示的实现过程,可用相应的画图函数在GDP层上画出16位色的位图。 相似文献
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This article presents a practical home video streaming system that has actually been implemented and deployed for commercial services on a cable television network. Because streaming components and network connections of a cable TV network are considerably different from those of desktop streaming systems available on the Internet, traditional systems and techniques for video streaming are not enough for a cable TV network. Therefore, several special systems and server-centric streaming techniques have been developed for a cable TV network and home video clients. In particular, server-centric streaming techniques are crucial because a set-top box, which is the client in the case of a home video streaming system, lacks processing power. We have developed a highly efficient streaming server using network acceleration and data bypassing techniques. As a result, our stateof- the-art streaming server enables high scalability and provides various content navigation modes, including faster playback, to off-the-shelf set-top boxes. 相似文献
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数字电视双向平移已成为广电网络走向"三网融合"和业务向纵深发展的必经之路。广电网络公司前期在数字电视整体平移过程中,基本上是以单向机顶盒为主进行整体平移,约占总数的80%左右。怎样使这80%的单向数字电视用户实现双向互动功能,这对广电今后的发展具有战略性的意义。根据丽水市城区和所属8县(市)的具体情况,因地制宜,对各种双向网络改造进行技术比较、成本测算、综合应用,对丽水市有线电视双向网络进行深化改造,使单向机顶盒实现双向互动功能,加快全网数字电视双向平移。 相似文献
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We introduce a specific transport and transmission scheme for video-on-demand (VoD) called constant-rate transmission and transport (CRTT). CRTT establishes a constant bit-rate (CBR) virtual channel between the video provider and the viewer's set-top box (STB) and then transmits cells from the provider into this channel at a constant rate. Since we assume that the number of cells in a frame is variable, CRTT requires that some number of cells be built up in an STB buffer before the commencement of playback. The build up, cell transmission rate, and the set-top memory size must be chosen so that there is no starvation or overflow at the STB. We develop fundamental relationships between these parameters for viable CRTT. We then apply the theory to an MPEG encoding of Star Wars and find that the minimal STB memory far CRTT is 23 Mbytes. We also consider varying the constant rate over a small number of intervals. We find, for example, that for Star Wars approximately 2 Mbytes of set-top memory suffices with 32 constant-rate intervals 相似文献
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较详细地介绍了我国有线电视网的发展过程和基于HFC网开展的新型业务,同时详细地论述了视频点播、机顶盒的关键技术。 相似文献
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交互式电视与多媒体技术 总被引:3,自引:2,他引:1
介绍交互式视电视技术的发展现状以及它与多媒体技术的联系,论述了交互式电视的系统结构和组成原理。最后介绍了ITV中两个重要的设备,视频服务器和机顶盒的结构和设计。 相似文献
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Inside the set-top box 总被引:2,自引:0,他引:2
《Spectrum, IEEE》1995,32(4):70-75
As an aid to the TV receiver and VCR, the set-top box offers improved tuning and interactive hookups, but questions remain as to who will own and replace it. As a supplemental piece of television equipment, it can either compensate for a tuning deficiency or add capability like interactive electronics to a television receiver or a VCR. The author discusses the uses of the set-top box and its operation 相似文献