5.1环绕声电视音频车直播系统的设计与实现

发布时间：2018-01-26 20:40

  本文关键词： 5.1环绕声 杜比编解码 音频车 环绕声制作　出处：《上海交通大学》2014年硕士论文　论文类型：学位论文

【摘要】：5.1环绕声电视播出在西方发达国家已经开始普及,而国内电视台因长期以来对声音缺乏重视,资源投入少,导致环绕声制作平台缺乏,播出和传输环节存在一定的技术难点,面对不同声音格式需求的用户缺乏有效的多声道兼容播出的方案,尤其是大型外场综艺节目的环绕声制作要求高,因此至今国内仍没有综艺节目环绕声制播的先例。本论文以《中国好声音》作为节目制作对象,设计完成了基于杜比技术的5.1环绕声电视音频车直播系统,成功实现了国内第一次综艺节目的5.1环绕声电视播出。5.1环绕声技术和杜比编解码技术是本论文的关键技术。环绕声技术为环绕声制作系统的设计提供了主要标准,杜比编解码技术使得在环绕声制作阶段即可对声音播出和终端效果进行有效控制,并且简化了环绕声播出的系统链路适应国内数字电视传输模式,为多声道兼容播出提供了解决方案。《中国好声音》是一档典型的大型外场综艺节目,本论文以此进行需求分析,以安全、开放、灵活、高效、优质作为设计理念设计实现了一套5.1环绕声电视音频车直播系统,并引入杜比编解码技术,通过对播出链路的改造,提出了多声道兼容播出的解决方案。本论文首先对音频车系统的架构、基于杜比技术的制播链路和系统的工作流程做了阐述,系统设计主要包括调音台系统、无线系统、冗余光纤系统、杜比编解码系统、同步系统、延时系统、监听监看系统、声学设计。系统根据需求分析进行设备选型和集成安装,施工完毕之后,根据广电总局的技术要求对系统进行了性能测试,杜比元数据是影响环绕声播出质量的重要参数,本论文以《中国好声音》作为实验对象,对杜比元数据做了深入的测试分析,并列出元数据的设置比较,并详述了节目的环绕声制作过程,此外,本论文还对用户终端进行了环绕声杜比数字解码测试。本论文还对环绕声技术的发展趋势做了分析,从视音频传播和技术发展的角度展望了未来环绕声的发展方向。
[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.
【学位授予单位】：上海交通大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TN948.2
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本文编号：1466536