文档介绍：太原理工大学
硕士学位论文
基于EMMA2SE平台的PVR机顶盒文件存储系统设计与实现
姓名:司尤涛
申请学位级别:硕士
专业:控制理论与控制工程
指导教师:牛昱光
20090401
太原理工大学工程硕士研究生学位论文
基于 EMMA2SE 平台的 PVR 机顶盒文件存储系统设计与实现
摘要
近几年来,随着数字电视在我国的大力普及,用户对数字电视的要求
越来越高。从目前用户的需求来看,数字电视主要有两个发展方向,一是
能为用户提供高质量、高清晰度画面的数字高清电视(High Definition
Television,HDTV);再就是为用户提供多种创新的服务,个人视频录像
机(Personal Video Record,PVR)就是其中之一。
与普通机顶盒相比,PVR 机顶盒最大的特点是加入了大容量的硬盘,
并且围绕着大容量的硬盘衍生出许多新的技术,如节目录制、节目预定、
定时录制、TimeShift 等。而这些新技术的实现都依赖于一个稳定、优化、
高效率的文件系统来对硬盘进行有效的管理,所以文件系统是否稳定与可
靠就成了 PVR 稳定和可靠的关键。
本文作者的研究课题是以 NEC 的 EMMA2SE 多媒体处理器为硬件平
台和 Nucleus PLUS 为软件平台,研究和开发 PVR 机顶盒的文件系统。该项
目是在国家广电总局直播星“村村通”计划的基础上的开发,日前样板机
已经通过广电总局的认可。本文是作者对“PVR 机顶盒开发设计”项目的
总结,文中简要介绍了 PVR 机顶盒的结构、基本功能和原理,详细介绍
磁盘管理以及 PVR 机顶盒文件系统的设计。
关键词:PVR,EMMA2SE,FAT32,TIMESHIFT,NUCLEUS FILE
ii
太原理工大学工程硕士研究生学位论文
The Design and Implementation of File System for PVR Set-top Box Based on EMMA2SE
Platform
ABSTRACT
In recent years, wth the strong popularity of digital television in our
country, the user requirements for digital television had e more
sophisticated. From the current needs of the users, there were two major
direction of development for digital TV. The first one was to provide the users
with high-quality, high-definition digital high definition television screen (High
Definition Television, HDTV), the other with a variety of innovative services,
and PVR Set-Top was one of them.
Compared with the ordinary set-top boxes, the biggest feature to PVR set-
top box was that it had a large-capacity hard disk, and around the large-capacity
hard drive PVR leads to many new technologies, such as program recording,
program reservation, time recording, and time shift and so on. The realization of
these new technologies relied on a stable, optimized, highly efficient file system
to effectively manage the hard disk, so the table and reliable file system
determined the stability and reliability of PVR Set-Top.
The topics of this paper was the research and development of PVR set