【作者】 汪明；

【导师】 王宏远；

【作者基本信息】 华中科技大学 ， 通信与信息系统， 2006， 硕士

【摘要】 电子节目指南(Electronic Program Guide,简称EPG),是数字电视中一项极其重要的应用,是用户进入数字电视的门户。通过使用EPG,用户可以方便地浏览和查询节目,了解节目信息,快速定位节目的位置,并获得丰富的信息服务。目前我国正在大力推广数字电视,数字电视机顶盒作为过渡时期的产品,有着广泛的市场前景,而EPG提供的好坏是用户在选择机顶盒时的一个重要指标。本文首先深入研究了PSI信息、SI信息,对PSI、SI信息表中的主要内容作了详细的介绍。PSI的主要作用是对现行复用流中不同节目码流的解复用和解码,找到节目和要解压缩的码流,而DVB-SI是EPG信息的主要来源,提供了网络信息、业务群信息、业务信息和节目信息,通过对SI信息的适当组合,可以为用户提供形式多样、丰富多彩的信息。在对标准的深入理解的基础上,本文接着介绍了STB的软硬件结构、用户应用软件系统的模块划分和功能,然后给出了如何组织SI信息实现EPG菜单中的节目搜索、节目指南、频道分类和NVOD功能,对于NVOD的实现采用了二叉树的存储方式,节省了存储空间,搜索更为快捷。最后简要介绍机顶盒的远程升级实现方案。目前,本次设计的成果已在武汉、南京、南宁等地的有线电视网络中得到应用。更多还原

【Abstract】 Electronic Program Guide (EPG) is one of the very important applications of the Dig-ital TV (DTV) and is the gateway for the consumers watching the Digital TV. By EPG,consumers can enjoy the luxuriant information services by browsing the programs expedi-ently, learning the information completely, and orienting the positions efficiently. Now Chi-nese government has been paid more and more attention to DTV. DTV set top box (STB)is an important product driving DTV industry during current ATV and DTV coexistenceperiod.EPG’s performance is an important point when consumers buy a STB.This paper first deeply analyses program special information (PSI) and serviceinformation (SI), introduces the main information of tables in PSI and SI. The mainfunction of PSI is de-multiplexed and decoded the program stream of MUX stream,found the program and the stream needs to be decompressed. DVB-SI which providesnetwork、bouquet、service and event information is the main content for EPG. Usingproper organization of SI can provides various information for consumers.Based on thecomprehension to those standards,the architecture of hardware and software in the STB isresearched into, included the modules and function of the user application software. thehow to organize the SI to realize program search、program guide、service sort guide andNear Video On Demand (NVOD) is detail by detail discussed. Using binary tree to storeNVOD information can save memory and improve the search speed.At the end of thisthesis, a upgrade design based on cable network is simply introduced. Now, the productionof the design is applied to the digital products of Wuhan、Nanjing and Nanning cable TV net.更多还原