本文選題：HFC　切入點：STB　出處：《電子科技大學(xué)》2010年碩士論文

【摘要】： 在電視節(jié)目中植入字幕廣告信息一直是廣電部門向終端用戶發(fā)布通知信息和廣告的有效形式和途徑。字幕的生成有兩種方式來實現(xiàn)。第一種,將字幕同節(jié)目源合成形成帶字幕的節(jié)目。這種模式的優(yōu)點在于在用戶終端能夠直接播放出來。缺點在于在合成字幕的同時對節(jié)目源進(jìn)行了修改,用戶只有綁定節(jié)目源的同時實現(xiàn)字幕合成。第二種,將字幕和節(jié)目源分離,在用戶終端合成顯示出來。通過該模式將字幕根據(jù)協(xié)議生成一個單獨的TS流傳送到用戶終端(機頂盒),用戶終端(機頂盒)將接受到的TS流進(jìn)行解析后將字幕信息顯示在電視終端。該模式的優(yōu)點在于不會對節(jié)目源數(shù)據(jù)進(jìn)行修改,字幕的生成同節(jié)目源關(guān)聯(lián)不大,用戶可以通過訪問互聯(lián)網(wǎng)來實現(xiàn)對字幕內(nèi)容的修改和生成。缺點在于用戶必須要有終端合成硬件(機頂盒)。 本課題采用了第二種方式來實現(xiàn)字幕。由于機頂盒終端的數(shù)據(jù)解析和顯示是由機頂盒提供商來完成的,故本課題任務(wù)是實現(xiàn)字幕TS流信息的編輯和TS的生成和傳輸。課題主要分為四個部分:1、根據(jù)實際字幕播出需求制定和設(shè)計基于MPEG2標(biāo)準(zhǔn)的字幕協(xié)議,通過該協(xié)議便于字幕流的生成和機頂盒的解析。2、字幕編輯系統(tǒng)。該系統(tǒng)采用BS模式實現(xiàn)多區(qū)域用戶對字幕進(jìn)行在線編輯和管理,對播出狀態(tài)進(jìn)行在線監(jiān)控和管理。3、XML生成系統(tǒng)。該系統(tǒng)通過WebService接口來實現(xiàn)字幕編輯系統(tǒng)同字幕TS流生成播出系統(tǒng)的數(shù)據(jù)傳輸,WEB程序調(diào)用WebService將當(dāng)前某區(qū)域的字幕信息生成為XML文件形式,播出服務(wù)器程序直接訪問和解析XML文件。4、播出服務(wù)器字幕TS流生成和播出系統(tǒng)。該系統(tǒng)讀取和解析字幕XML文件,然后根據(jù)協(xié)議將字幕信息寫入到TS流,然后調(diào)用ASI卡推送驅(qū)動將TS流通過ASI卡播出。通過本課題的研究主要實現(xiàn)的目標(biāo)包括:1、實現(xiàn)多區(qū)域用戶在線控制字幕編輯和生成。2、實現(xiàn)字幕流同節(jié)目源的復(fù)用和字幕推送。3、實現(xiàn)不同區(qū)域用戶顯示不同字幕信息。4、實現(xiàn)多頻道字幕播出。本文還對主要涉及的MPEG2標(biāo)準(zhǔn)、DVB-SI協(xié)議、SQLSERVER數(shù)據(jù)庫、ADO.NET數(shù)據(jù)庫連接、WebService等相關(guān)方面的內(nèi)容都作了詳細(xì)的闡述。由于本課題是運用于實際的工程類別課題,因此我們還通過搭建模擬網(wǎng)絡(luò)對本課題的研究成果進(jìn)行了測試。本文也對測試的相關(guān)內(nèi)容進(jìn)行了闡述。測試結(jié)果符合要求。
[Abstract]:The placement of subtitle advertising information in TV programs has always been an effective form and approach for radio and television departments to issue notification information and advertisements to end users. There are two ways to generate subtitles. Subtitles are combined with program sources to form subtitled programs. The advantage of this mode is that it can be broadcast directly at the user terminal. The user only binds the program source and realizes the subtitle synthesis at the same time. Second, the subtitle is separated from the program source. This mode generates a separate TS stream according to the protocol to the user terminal (set-top box, the user terminal (set-top box) parses the received TS stream, and subtitles are sent to the user terminal (STB) after parsing the received TS stream. " The advantage of this mode is that the program source data will not be modified. The generation of subtitles is not related to the program source. Users can modify and generate subtitle content by accessing the Internet. The disadvantage is that users must have terminal composition hardware (set-top box). This thesis adopts the second way to realize subtitle. Because the data parse and display of STB terminal is accomplished by STB provider. Therefore, the task of this project is to realize the editing of subtitle TS stream information and the generation and transmission of TS. The subject is divided into four parts: 1. According to the actual demand of subtitle broadcast, the subtitle protocol based on MPEG2 standard is developed and designed. This protocol is convenient to generate subtitle stream and parse. 2 of set-top box. The system adopts BS mode to realize online editing and management of subtitles by multi-area users. The system realizes the data transmission between the subtitle editing system and the subtitle TS stream generation broadcast system through the WebService interface. The Web program calls WebService to transfer the subtitle information of the current area. Is generated as a XML file, The broadcast server program directly visits and parses the XML file. 4, the TS stream generation and broadcast system of the broadcasting server. The system reads and parses the subtitle XML file, and then writes the subtitle information to the TS stream according to the protocol. Then the TS stream is broadcast through the ASI card by calling the ASI card push driver. The main objectives of this research include: 1, realizing the multi-area users' online control of subtitle editing and generating. 2, realizing the multiplexing of the subtitle stream and the program source and the realization of the reuse of the subtitle stream and the program source. Subtitles push. 3, users in different regions display different subtitles. 4, and multi-channel subtitles broadcast. This paper also gives details on the main MPEG2 standard, DVB-SI protocol, SQL server database and ADO. Net database connection and Web Service, etc. Since this subject is applied to the actual project category, Therefore, we also test the research results of this subject by building a simulation network. The relevant contents of the test are also described in this paper. The test results meet the requirements.
【學(xué)位授予單位】：電子科技大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2010
【分類號】：TN948.6

【引證文獻(xiàn)】

相關(guān)碩士學(xué)位論文 前2條

1 周展程;基于GIS的自動氣象站數(shù)據(jù)業(yè)務(wù)平臺[D];電子科技大學(xué);2012年

2 毛海軍;電視字幕播出系統(tǒng)的設(shè)計與實現(xiàn)[D];電子科技大學(xué);2012年

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本文編號：1670312