本文選題：衛(wèi)星影院　切入點：中星6A　出處：《電子科技大學》2017年碩士論文

【摘要】：隨著高清大屏越來越多的走進千家萬戶,配套的高清節(jié)目的接入方式也是百家爭鳴。消費者為了收看更多的高清多媒體內容,既能用已經(jīng)在網(wǎng)上下載好的內容進行本地播放;也可以通過有線高清機頂盒來實時收看;或者用高清網(wǎng)絡播放器進行自助點播;甚至部分音視頻發(fā)燒用戶選擇價格較高的藍光播放器來播放畫質更好的藍光碟片。但是對于部分不愿再家里堆積大量藍光碟片、所在地互聯(lián)網(wǎng)不夠發(fā)達且當?shù)赜芯�電視高清內容較為匱乏的消費者,有沒有一種新的高清多媒體內容接入方式呢?基于DVB-S2標準的高清衛(wèi)星電視正好填補了這一空缺。某傳媒有限公司依托國內先進的通信衛(wèi)星服務技術及優(yōu)質的資源,提出了“衛(wèi)星影院”解決方案。即租用中國上空的中星6A衛(wèi)星轉發(fā)器,將經(jīng)過發(fā)行商授權的數(shù)字出版物,如音像、電子報刊雜志、游戲、軟件、實用信息等豐富的多媒體內容,以PUSH-VOD(Push Video On Demand推送式視頻點播)方式推送到用戶的終端機頂盒,并且保存在機頂盒自帶的硬盤。終端機頂盒收到這些內容后,經(jīng)過認證解密即可在電腦、電視等設備觀看這些精彩內容(如好萊塢新片、經(jīng)典影片、經(jīng)典美劇、英劇、紀錄片等)。本文基于該傳媒公司對終端機頂盒的要求規(guī)范,研究并設計了一款既能收看衛(wèi)星推送的“衛(wèi)星影院”節(jié)目、又能收看地方有線電視節(jié)目的機頂盒。前者工作于DVB-S2模式,后者工作于DVB-C模式,均支持收看高清節(jié)目,故命名為雙解調高清機頂盒。文章分別介紹了兩種模式下前端系統(tǒng)及終端系統(tǒng)組成,分析了該傳媒公司終端規(guī)范要求后畫出了機頂盒原理框圖。隨后根據(jù)框圖進行了主要芯片選型、外圍電路設計、接口擴展等硬件電路設計;并介紹了機頂盒軟件框架,描述了調諧器、解調器軟件驅動移植過程,分享了驅動移植過程的中解決問題的思路;討論了機頂盒PUSH過程中數(shù)據(jù)保存的流程、機頂盒幾種工作狀態(tài)之前的切換,以及如何利用程序簽名認證保證PUSH內容的信息傳輸安全;完成設計最后經(jīng)過一系列測試最終達到了預計的設計要求。
[Abstract]:With the high-definition screen more and more into thousands of households, the matching access mode of HD programs is also a hundred schools of thought contention.In order to watch more high-definition multimedia content, consumers can not only use the content that has been downloaded on the Internet for local play, but also can watch it in real time through the cable high-definition set-top box, or use the high-definition network player to self-order;Even some audio and video fever users choose a higher-priced Blu-ray player to play better Blu-ray discs.But for some consumers who do not want to pile up a large number of Blu-ray discs at home, the location of the Internet is not developed and the local cable TV HD content is relatively scarce, is there a new high-definition multimedia content access?The DVB-S2 standard-based high-definition satellite television just fills the gap.Relying on the advanced communication satellite service technology and high quality resources, a media company put forward the solution of Satellite Cinema.That is to say, the satellite transponder of China Star 6A over China will have rich multimedia content such as audio and video, electronic newspapers and magazines, games, software, practical information, and other digital publications authorized by the distributor.It is pushed to the user's terminal set-top box with PUSH-VOD(Push Video on Demand push video on demand (VOD) mode, and stored in the STB's own hard disk.After receiving this content, the terminal set-top box can be authenticated and decrypted to watch the wonderful content on computer, television and other devices (such as Hollywood new films, classic movies, classic American TV, British drama, documentary and so on).Based on the specification of the terminal set-top box, this paper studies and designs a set top box which can not only watch the satellite cinema program, but also watch the local cable TV program.The former works in DVB-S2 mode, while the latter works in DVB-C mode, which supports watching HD programs, so it is named double Demodulation HD STB.This paper introduces the front-end system and the terminal system in two modes, analyzes the requirements of the terminal specification of the media company, and draws out the schematic block diagram of the set-top box.Then according to the block diagram, the main chip selection, peripheral circuit design, interface expansion and other hardware circuits are designed, and the software framework of set-top box is introduced, and the process of the tuner and demodulator software drive and transplantation is described.This paper shares the idea of how to solve the problem in the process of driving transplantation, discusses the flow of data saving in STB PUSH process, the switching before several working states of STB, and how to use program signature authentication to ensure the information transmission security of PUSH content.After a series of tests, the design finally reached the expected design requirements.
【學位授予單位】：電子科技大學
【學位級別】：碩士
【學位授予年份】：2017
【分類號】：TN948.55

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相關期刊論文 前10條

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本文編號：1729973