基于嵌入式Linux的IPTV2.0机顶盒的设计与实现

发布时间：2018-01-28 14:19

本文关键词： 互联网网络电视嵌入式系统 IPTV机顶盒流媒体播放器　出处：《安徽理工大学》2012年硕士论文　论文类型：学位论文

【摘要】：近几年来,随着电视技术和多媒体技术的飞速发展,传统电视的单向式频道传输技术难以满足用户个性化的需求。随着互联网技术的不断成熟以及应用的不断普及,领域专家提出了网络电视这一全新的电视技术,即Internet Protocol Television,简称为IPTV。网络电视是一种集交互式与个性化服务为一体、利用互联网这一新兴载体传播电视媒体信息的技术,其主要功能是向广大观众提供音频或音视频同步的点播、在线或离线观看家庭娱乐节目、游戏、通信、互动广告等服务内容。本文分析了IPTV产生及其发展的背景、国内外目前研究的现状和系统组成等内容。IPTV主要由节目制作、内容管理、中心媒体服务、运营支撑、接入和用户终端等六大子系统组成；分析了IPTV中涉及到的主要技术,主要包括流媒体技术、数字版权管理技术、EPG技术、P2P技术、机顶盒技术、IPTV音视频编码技术和流媒体传输技术；详细分析了IPTV机顶盒的核心部件---嵌入式流媒体播放器的设计过程及实现方法。本文研究了基于Linux的嵌入式流媒体播放器的总体架构、功能模块的划分以及各子模块的设计与实现方法。最后,针对网络电视音视频不同步这一较常见的疑难问题,提出了音视频同步反馈系统,即二次同步的思想解决这一疑难问题。本文设计的IPTV机顶盒从同等网络带宽下的视频质量问题、P2P网络传输分享技术以及支持体感游戏等方面对传统机顶盒加以改进。经测试该播放器对于不同音视频编码方式,不同的分辨率以及不同的帧率均能正常播放,且能够播放高清分辨率的媒体文件。
[Abstract]:In recent years, with the rapid development of television technology and multimedia technology, the traditional TV channel one-way transmission technology is difficult to meet the needs of individual users. With the Internet technology continues to mature and the widespread application, experts in the field of network television presents a completely new television technology, namely Internet Protocol Television, referred to as IPTV. network TV is a set of interactive and personalized service as a whole, the use of Internet which is a new carrier of information communication of television media technology, its main function is to provide on-demand audio or audio and video synchronization to a broad audience, online or offline watching family entertainment, games, interactive communication, advertising and other services.
This paper analyzes the origin and background of the development of IPTV at home and abroad, the current research status and system composition of.IPTV content is mainly composed of program production, content management, media service center, operation support, access and user terminal consists of six subsystems; analyzes the main technologies involved in the IPTV, including streaming media technology, digital the copyright management technology, EPG technology, P2P technology, set-top box technology, IPTV audio and video encoding technology and streaming media transmission technology; the design process is analyzed in detail, the core component of IPTV set-top box embedded streaming media player and method. This paper studies the architecture of streaming media player based on Linux embedded function module and the design of each sub module and implementation method. Finally, in view of the network television audio and video synchronization which is a common problem, put forward the audio and video synchronization feedback The system, that is, the thought of the two synchronization, solves this difficult problem.
The design of IPTV set-top box from the video quality under the same network bandwidth, P2P network transmission technology to share and support body sense game and other aspects of the improvement of the traditional set-top box. The player for different audio and video encoding, different resolution and different frame rate to normal play, and can play HD resolution the media file.

【学位授予单位】：安徽理工大学
【学位级别】：硕士
【学位授予年份】：2012
【分类号】：TN948.55

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