【作者】 廖诗彬；

【导师】 王华军； 苗放；

【作者基本信息】 成都理工大学 ， 计算机应用技术， 2009， 硕士

【摘要】 随着计算机技术的普及,信息化、智能化、网络化的发展,传统的电视技术得到了广泛的发展和应用;随着高性能集成芯片技术的发展以及嵌入式技术的成熟,各种各样的嵌入式产品已经悄然走进我们的生活。作为最新的计算机技术和电视技术的集合体:数字电视逐渐引起了人们广泛的关注,世界各国都希望在这一新兴领域取得控制权,以美国、欧盟和日本为代表的发达国家和地区纷纷制定了各自的数字电视技术标准,试图占领这一技术领域。随着这一新兴产业的快速发展和市场的逐渐成熟,越来越多的数字电视产品将不断走进我们的生活。论文以数字电视机顶盒作为讨论的对象,重点讨论数字电视机顶盒基于C/S模式软件系统的实时更新及升级优化技术的设计,建立软件设计结构模型,并编码实现。论文首先研究了电视技术的发展历程,国内外数字电视的发展状况,数字有线电视机顶盒的概念,基本功能和关键技术,以及我国数字电视的发展趋势;随后结合我国目前使用的数字有线电视网络标准,深入研究了数字有线电视标准的核心:DVB-C和MPEG-2两大技术标准,重点研究了DVB-C标准的系统流程和MPEG-2标准中与实时快速升级相关的各个子表功能及应用技术。结合实际开发经验,本文系统研究了数字电视机顶盒硬件结构设计模型及各硬件模块的功能,详细研究了基于ST5105芯片的数字电视机顶盒软件系统实时更新系统的模型设计。本文采用C/S模式的结构模型,从提高升级速度、优化系统性能、提高代码的可重用性出发,重点研究了前端软件和机顶盒端软件的功能设计、各模块函数设计及最终实现。并通过模拟真实有线电视网络运行环境,对整个软硬件系统进行测试,并对整个系统优化方案作出评价和提出修改意见。更多还原

【Abstract】 Along with the popularization of computer technology, and with the development of information technology, intelligent technology, network technology, the embedded system obtain large develop space. The traditional TV technology has been widely application and development; Along with the development of high performance integrated chips technology and embedded technology maturity, various embedded products has been quietly walked into our life. As an aggregation of latest computer technology and TV technology: high-definition digital television has attracted large attentions. All countries of the world hope to get controller field in this new field. The developed countries and regions just as United States, European Union and Japan have established their high-definition digital television technology standard, and trying to capture this technology field. Along with the high development of this new technology and the market of mature gradually, more and more HD digital TV product will come into our life.HD digital TV set-top box has been discussed as the object for this thesis; we focus on design and optimization the set-to box software real-time update system which base on C/S mode.At the beginning, this article introduces the development history and situation of TV technology all of the world; the concept, basic function and key technology of digital cable TV set-top boxes, and the development trend of digital TV in our country.Combined with practical experience, this article summarize the hardware architecture and module function of set-top box, and focus on the Modules design of STB software real-time update system which base on ST5105.The architecture of this design is based on C/S mode, we put our thinking on increasing update speed, optimization the performance of system and improving the code reusability, Mainly introduces the server and STB software system function design each module function design and implementation. Then simulate the real TV network environment for testing the whole hardware and software system and propose optimization solution comments and amendment opinions.更多还原