文档介绍：华中科技大学
硕士学位论文
基于DVB-C的接收机系统的设计与实现
姓名:张嵘
申请学位级别:硕士
专业:通信与信息系统
指导教师:王宏远
20060501
摘要
随着数字电视广播的迅猛发展,数字电视机顶盒已进入越来越多的家庭,同
时机顶盒本身的功能也越来越强大,提供的服务越来越丰富,使之在家庭娱乐中
扮演着越来越重要的角色。
本文主要讨论了 DVB-C 数字机顶盒的设计与实现。文中先介绍了世界上主
流数字电视广播系统标准的情况,以及机顶盒的发展历史和在国内的推广现状,
然后简要阐述了 DVB 和 MPEG-2 标准。
基于对标准的理解,本文介绍了 DVB-C 机顶盒的一种解决方案的具体设计
和实现,包括硬件平台、系统框架、所用嵌入式实时操作系统以及软件流程的说
明。然后就其中的几个重要组成模块分别做详细介绍:结合嵌入式 GUI 开发的要
点,介绍本系统的 GUI 设计;PTI 是从 TS 流中获取上层应用所需信息的重要模
块,结合本系统设计方案在开发中的实际问题分析本模块的设计要点;升级模块
的模块化升级方法;最后介绍了基于 DVB-SI 信息的 EPG 模块实现。
结合数字电视市场运营的发展前景,提出数字电视机顶盒的发展成为数字化
家庭信息中心的趋势,并介绍了中间件和双向交互技术对此发展趋势的重要促进
作用。
文中介绍的机顶盒已有产品进入市场,功能领先市场,运行稳定,得到用户
好评。
关键词:数字电视 MPEG-2 DVB-C接收机实时操作系统
GUI PTI 模块升级 EPG

I
Abstract
With the high speed of development of Digital Video Broadcasting, Digital Video
Set-Top-Boxes(STB) have entered more and more home. Whilst STBs are providing
stronger and stronger founctions, and more and more various service, they have played a
more and more important role in the home entertainment system.
The thesis mainly discusses the design and the implementation of DVB-C Receiver.
Mainstream Digital TV system standards and the development history of STB, and
popularize of STB inland are introduced firstly, then it introduces the MPEG-2 standard
and the European DVB standard briefly.
Based on prehension to those standards, a specific solution of the DVB-C
receiver are analyzed, including hardware platform, system frame, embedded Real-time
operation system and software work flow. And then some ponents are
analyzed in detail: GUI used in this system and points of development of GUI in
embedded system; design of PTI and problems solved during development of PTI,
which captures the information other applications need from TS stream; the methord of
module upgrading; implementation of EPG module based on DVB-SI.
With the future of DTV, the trend that the STBs are ing the information
centers of digital home is presented, and the technique Middle-ware an