基于COS系统的最小化有线电视播放系统的设计与实现

发布时间：2018-03-31 14:46

本文选题：有线数字电视　切入点：智能操作系统　出处：《东南大学》2016年硕士论文

【摘要】：网络电视机顶盒的出现对传统数字电视业务造成了巨大的冲击,在移动互联网的大背景下,传统数字电视机顶盒需要向智能化发展,在现有智能操作系统的基础上增加有线电视播放功能实现了兼顾有线电视播放与系统智能化的目标。本文的主要工作是结合DVB-C有线电视播放技术的特点,研究如何在COS (China OS)智能操作系统上添加DVB-C有线电视播放功能,并最终形成一个基于精简版COS系统的有线电视播放系统。本论文首先分析了数字电视行业的现状,针对传统数字电视机顶盒向智能化发展提出了一个可行的方向。然后介绍并结合了DVB有线数字电视相关技术,对基于COS系统的最小化有线电视播放系统进行需求分析和功能目标的定义。本文设计并实现了基于智能操作系统的有线电视播放系统通用架构,达到了提高代码复用性的目的。本文通过分层架构及合理组织的各功能模块,降低了代码冗余度,使该系统满足了系统镜像“最小化”的设计目标。系统镜像“最小化”是为了将该系统刷入大小为128MB的flash分区。当机顶盒从COS系统分区启动系统失败时,就会重新从本系统镜像分区启动系统,从而达到了在COS系统出现问题启动失败的情况下用户仍然能够使用有线电视播放功能的目的。本文结合DVB-C有线电视播放技术的特点,设计并实现了具有有线电视播放功能、能使系统镜像最小化的有线电视播放系统,包括有线电视适配层、有线电视业务层、有线电视接口层和有线电视应用层的设计与实现。本文所设计的有线电视播放系统具有传统有线电视播放系统的基本功能,包括电视节目播放、电子节目指南、频道搜索、系统更新、基本设置等,通过这些功能基本可以达到用户对有线电视播放系统的使用需求。本文成功实现了基于COS系统的最小化有线电视播放系统。通过测试验证,该系统功能完整可用,满足系统设计目标中的各项性能需求,为进一步的扩展功能奠定了基础。
[Abstract]:The appearance of network TV set-top box has caused a huge impact to the traditional digital TV service. Under the background of mobile Internet, the traditional digital TV set-top box needs to develop intelligently.On the basis of the existing intelligent operating system, adding the cable TV playback function to realize the goal of giving attention to both the cable TV play and the intelligent system.The main work of this paper is to study how to add the DVB-C cable TV playback function to the COS / China intelligent operating system, and finally form a CATV playback system based on the refined COS system, which is based on the characteristics of the DVB-C cable TV playback technology.This paper first analyzes the current situation of digital TV industry, and puts forward a feasible direction for the development of traditional digital TV set-top box to intelligent.Then the paper introduces and combines the related technology of DVB cable digital TV to analyze the requirement and define the function target of the minimized CATV playback system based on COS system.This paper designs and implements the general architecture of CATV playback system based on intelligent operating system, and achieves the purpose of improving code reusability.In this paper, the redundancy of code is reduced by hierarchical structure and every function module of reasonable organization, which makes the system meet the design goal of "minimization" of system mirror image.System mirroring minimization is to brush the system into an flash partition of 128MB size.When the set-top box fails to start the system from the COS system partition, the system will be started again from the system mirror partition, thus the user can still use the CATV playback function when the COS system has a problem startup failure.According to the characteristics of DVB-C CATV playing technology, this paper designs and implements a CATV playback system with CATV playing function, which can minimize the image of the system, including CATV adaptation layer, CATV business layer, CATV service layer.The design and implementation of CATV interface layer and CATV application layer.The CATV playback system designed in this paper has the basic functions of the traditional CATV broadcast system, including TV program broadcast, electronic program guide, channel search, system update, basic setup, etc.Through these functions, we can basically meet the user's demand for CATV playback system.In this paper, we successfully implement a minimized CATV playback system based on COS system.The test results show that the system is fully functional and can meet the performance requirements of the system design goal, which lays a foundation for the further expansion of the function.
【学位授予单位】：东南大学
【学位级别】：硕士
【学位授予年份】：2016
【分类号】：TN949.194;TP311.52

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