本文關(guān)鍵詞： 互聯(lián)網(wǎng) 網(wǎng)絡電視 嵌入式系統(tǒng) IPTV機頂盒 流媒體播放器　出處：《安徽理工大學》2012年碩士論文　論文類型：學位論文

【摘要】：近幾年來,隨著電視技術(shù)和多媒體技術(shù)的飛速發(fā)展,傳統(tǒng)電視的單向式頻道傳輸技術(shù)難以滿足用戶個性化的需求。隨著互聯(lián)網(wǎng)技術(shù)的不斷成熟以及應用的不斷普及,領(lǐng)域?qū)＜姨岢隽司W(wǎng)絡電視這一全新的電視技術(shù),即Internet Protocol Television,簡稱為IPTV。網(wǎng)絡電視是一種集交互式與個性化服務為一體、利用互聯(lián)網(wǎng)這一新興載體傳播電視媒體信息的技術(shù),其主要功能是向廣大觀眾提供音頻或音視頻同步的點播、在線或離線觀看家庭娛樂節(jié)目、游戲、通信、互動廣告等服務內(nèi)容。 本文分析了IPTV產(chǎn)生及其發(fā)展的背景、國內(nèi)外目前研究的現(xiàn)狀和系統(tǒng)組成等內(nèi)容。IPTV主要由節(jié)目制作、內(nèi)容管理、中心媒體服務、運營支撐、接入和用戶終端等六大子系統(tǒng)組成；分析了IPTV中涉及到的主要技術(shù),主要包括流媒體技術(shù)、數(shù)字版權(quán)管理技術(shù)、EPG技術(shù)、P2P技術(shù)、機頂盒技術(shù)、IPTV音視頻編碼技術(shù)和流媒體傳輸技術(shù)；詳細分析了IPTV機頂盒的核心部件---嵌入式流媒體播放器的設計過程及實現(xiàn)方法。本文研究了基于Linux的嵌入式流媒體播放器的總體架構(gòu)、功能模塊的劃分以及各子模塊的設計與實現(xiàn)方法。最后,針對網(wǎng)絡電視音視頻不同步這一較常見的疑難問題,提出了音視頻同步反饋系統(tǒng),即二次同步的思想解決這一疑難問題。 本文設計的IPTV機頂盒從同等網(wǎng)絡帶寬下的視頻質(zhì)量問題、P2P網(wǎng)絡傳輸分享技術(shù)以及支持體感游戲等方面對傳統(tǒng)機頂盒加以改進。經(jīng)測試該播放器對于不同音視頻編碼方式,不同的分辨率以及不同的幀率均能正常播放,且能夠播放高清分辨率的媒體文件。
[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.

【學位授予單位】：安徽理工大學
【學位級別】：碩士
【學位授予年份】：2012
【分類號】：TN948.55

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本文編號：1471014