本文關鍵詞： 5.1環(huán)繞聲 杜比編解碼 音頻車 環(huán)繞聲制作　出處：《上海交通大學》2014年碩士論文　論文類型：學位論文

【摘要】：5.1環(huán)繞聲電視播出在西方發(fā)達國家已經(jīng)開始普及,而國內(nèi)電視臺因長期以來對聲音缺乏重視,資源投入少,導致環(huán)繞聲制作平臺缺乏,播出和傳輸環(huán)節(jié)存在一定的技術難點,面對不同聲音格式需求的用戶缺乏有效的多聲道兼容播出的方案,尤其是大型外場綜藝節(jié)目的環(huán)繞聲制作要求高,因此至今國內(nèi)仍沒有綜藝節(jié)目環(huán)繞聲制播的先例。本論文以《中國好聲音》作為節(jié)目制作對象,設計完成了基于杜比技術的5.1環(huán)繞聲電視音頻車直播系統(tǒng),成功實現(xiàn)了國內(nèi)第一次綜藝節(jié)目的5.1環(huán)繞聲電視播出。5.1環(huán)繞聲技術和杜比編解碼技術是本論文的關鍵技術。環(huán)繞聲技術為環(huán)繞聲制作系統(tǒng)的設計提供了主要標準,杜比編解碼技術使得在環(huán)繞聲制作階段即可對聲音播出和終端效果進行有效控制,并且簡化了環(huán)繞聲播出的系統(tǒng)鏈路適應國內(nèi)數(shù)字電視傳輸模式,為多聲道兼容播出提供了解決方案。《中國好聲音》是一檔典型的大型外場綜藝節(jié)目,本論文以此進行需求分析,以安全、開放、靈活、高效、優(yōu)質(zhì)作為設計理念設計實現(xiàn)了一套5.1環(huán)繞聲電視音頻車直播系統(tǒng),并引入杜比編解碼技術,通過對播出鏈路的改造,提出了多聲道兼容播出的解決方案。本論文首先對音頻車系統(tǒng)的架構、基于杜比技術的制播鏈路和系統(tǒng)的工作流程做了闡述,系統(tǒng)設計主要包括調(diào)音臺系統(tǒng)、無線系統(tǒng)、冗余光纖系統(tǒng)、杜比編解碼系統(tǒng)、同步系統(tǒng)、延時系統(tǒng)、監(jiān)聽監(jiān)看系統(tǒng)、聲學設計。系統(tǒng)根據(jù)需求分析進行設備選型和集成安裝,施工完畢之后,根據(jù)廣電總局的技術要求對系統(tǒng)進行了性能測試,杜比元數(shù)據(jù)是影響環(huán)繞聲播出質(zhì)量的重要參數(shù),本論文以《中國好聲音》作為實驗對象,對杜比元數(shù)據(jù)做了深入的測試分析,并列出元數(shù)據(jù)的設置比較,并詳述了節(jié)目的環(huán)繞聲制作過程,此外,本論文還對用戶終端進行了環(huán)繞聲杜比數(shù)字解碼測試。本論文還對環(huán)繞聲技術的發(fā)展趨勢做了分析,從視音頻傳播和技術發(fā)展的角度展望了未來環(huán)繞聲的發(fā)展方向。
[Abstract]:5.1 surround sound television broadcasting in the western developed countries has begun to popularize, and domestic television stations because of the lack of attention to sound for a long time, less investment in resources, resulting in a lack of surround sound production platform. There are some technical difficulties in broadcasting and transmission links. In the face of different sound format users lack of effective multi-channel compatible broadcast program especially the large-scale outdoor variety show surround sound production requirements are high. So far, there is no precedent for the production and broadcasting of variety show surround sound in China. This paper takes "good Voice of China" as the program production object, and designs a 5.1 surround sound audio vehicle live broadcasting system based on Dolby technology. The successful realization of the 5.1 surround sound television broadcast of the first variety show in China and the Dolby coding and decoding technology are the key technologies in this paper. The surround sound technology provides the design of the surround sound production system. The main criteria. Dolby coding and decoding technology can effectively control the sound broadcasting and terminal effects in the surround sound production stage, and simplify the system link of surround sound broadcasting to adapt to the domestic digital television transmission mode. It provides a solution for multi-channel compatible broadcasting. "good Voice of China" is a typical large-scale outfield variety show, this paper carries on demand analysis in order to be safe, open, flexible and efficient. High quality as a design concept designed and implemented a 5.1 surround sound audio vehicle live broadcast system, and the introduction of Dolby codec technology, through the broadcast link transformation. This paper first describes the architecture of audio vehicle system, the production and broadcast link based on Dolby technology and the workflow of the system. The system design mainly includes the mixer system. Wireless system, redundant optical fiber system, Dolby codec system, synchronization system, delay system, monitor and watch system, acoustic design. According to the technical requirements of the SARFT, the performance of the system is tested. Dolby metadata is an important parameter affecting the broadcast quality of surround sound. This paper makes a deep test and analysis of the Dolby metadata, lists the metadata settings and compares, and details the program surround sound production process, in addition. This paper also carries on the surround sound Dolby digital decoding test to the user terminal. The development trend of the surround sound technology is also analyzed in this paper. The development direction of surround sound in the future is prospected from the point of view of video and audio transmission and technology development.
【學位授予單位】：上海交通大學
【學位級別】：碩士
【學位授予年份】：2014
【分類號】：TN948.2
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本文編號：1466536