【摘要】 传统电视工艺以AV技术为主,但随着IT技术尤其是网络化制播技术的发展,越来越多的AV系统架设在IT平台上,出现了AV和IT交互的部分,成为AV-IT系统,由此产生了一系列与测试相关且需要深入研究的问题。在电视系统中,AV-IT系统负责完成节目在信号、流和文件三大信息表达域间的转换,转换中需定量分析AV-IT过程的质量、性能、合规性和功能符合性。本文在分析AV-IT系统的基本特征的基础上,对AV-IT系统中的音视频信息交换过程,以及可能引起信息损伤的内在原因进行了全面分析,系统地阐述了AV-IT系统测试理论,制定出了AV-IT系统的基本测试项目。更多还原

【Abstract】 AV technology is a principal one for traditional TV systems. With development of IT technology and networked production and broadcasting technologiy, more AV systems have been set up on IT platforms. AV-IT systems appear for this reason. It results in a number of questions, associated with testing for AV-IT system, needed to be studied. AV-IT system is responsible for completing conversions among signal domain, stream domain and i le domain in the TV system. When an AV-IT conversion happens, related quality, performance, standard compliance and function compliance should be analysed quantitatively. By analyzing characteristics of AV-IT system, processes of AV-IT conversions and causes of information loss, the paper discussed a test theory of AV-IT system and made a basic testing project of AV-IT system.更多还原