Chapter 2 presents the advantages and indispensibility of the mhp platform firstly , then focuses on the principles and implementations of each modules . in chapter 3 , we proposed a dvb system applied to hfc networks , which satisfied the mhp platform 第三章首先针对家庭多媒体平台的需求构建出一套应用在hfc网络上的dvb系统，然后对系统中满足终端需求的前端部分的相关技术进行描述。
Through comparing existing standards in the world at present , this thesis chooses european dtv standard dvb - mhp and proposes an embedded middleware model based on it which according with current situation of our country 本文通过对当前国际上现有的中间件标准进行比较，选择了欧洲数字电视中间件标准dvb - mhp ，提出了基于mhp的符合我国现状的数字电视中间件模型，给出了该模型的设计方案以及模块划分。
Its advantages are as follows : standard and open platform ; satisfy the compatibility of media services ; support upstream interaction ; liable to extention ; this paper focuses on the principle of the mhp platform based on dvb technology 我们基于数据广播( dvb )的技术，选择家庭多媒体平台( mhp )作为终端平台解决方案。它主要有以下优点：标准、开放的平台；满足媒体业务的一致兼容性；支持上行交互；易于扩展。
The java platform is the core of the model . through analysing the composition of java platform and embedded java virtual machine - kaffe ' s principle and system structure , this thesis proposes a scheme that porting the kaffe awt to qt / e graphic library and realized on embedded linux Java平台是基于mhp中间件模型的核心，通过深入分析java平台的构成和嵌入式java虚拟机? ? kaffe的原理及体系结构，提出了将kaffe的awt类库移植到qt e图形库之上的方案，并在嵌入式linux上进行了实现。
In the following chapters , the paper introduces in detail and analyzes the layer structure of mhp ( multimedia home platform ) specification . along with the practice of the author , media presentation , the core part of mhp middleware , is interpreted with an emphasis . finally , the problems occurred during the practice with undergoing platform are raised and analyzed with a preliminary assessment 随后本文详细介绍和分析了mhp标准的层次化结构，剖析了mhp的核心dvb - j平台的各个功能模块和标准化接口，在此基础上结合作者的实际工作着重阐述了mhp中间件平台中媒体呈现部分的标准，又进一步结合底层软硬件平台分析了具体实现过程中遇到的问题，最后给出问题的解决途径并做了初步评估。
We also introduce the concerned headends techniques employed to achieve this terminal system . chapter 4 introduces the implementation of this mhp platform , including bottom resource , protocols , and its upper realization . based on dvb - j application model of dvb - mhp , a new creative application model , browser application model is suggested 第四章介绍家庭多媒体平台的具体实现，包括底层资源、协议以及上层应用的实现；并且在dvb - mhp的dvb - j的应用模式的基础上，富有创造性地提出了新的应用模式：浏览器应用模式，并给予实现。
The focus is about the char device driver design used in the dvb receiving card and the drive development process in user space ; analyzing the dvb receiving system working principle and process under linux and providing a method to load the linux dvb receive card device drive into the linux kernel ; analyzing and implementing the firmware design of saa7146 chipset working with linux kernel and working characteristic in vrious working mode ; analyzing and implementing the frontend drive programing of the digital tv receive system ; realized the qam demodulation and the mpeg stream filter , so that the output stream can be used to playing on pc better . and this article designs an event management mechanism based on the mhp , which improve the linux dvb software system 重点研究了数字电视接收卡的字符设备驱动问题,阐述了用户空间开发驱动程序的过程;分析了linux下数字电视接收系统的工作原理和驱动程序开发过程,给出了linuxdvbapi接收卡设备驱动程序加载到linux内核中的方法;研究实现了saa7146芯片配合linux内核共同工作的固件设计和不同工作模式下的工作特性;研究实现了dvb接收系统中前端驱动程序的编写;设计实现了qam解调和mpeg流解复用,使输出传输流较好地用于pc播放;同时,本文所设计的一种符合mhp规范的中间件事件管理机制,优化了linuxdvb软件系统。
