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本文从瑞士蒙特勒第12届国际电视讨论会和技术展览会(1981年5月31日至6月4日)会议期间讨论的情况和展出的展品,提出了视频切换中心的发展已进入“视频集中处理、组合效果”的新一代(第四代)的看法。文章分析比较了几种典型新产品的设计思想和优缺点;介绍了切换中心的组件化、积木式设计。文章还介绍了新一代产品的预置、预监功能的特点;计算机辅助制作、电子编辑接口和数字视频特技(DVE)的发展应用情况。文章最后强调了在切换中心设计中首先应加强软件设计,而软件设计应适应我国国情,在软件设计指导下来统一规划系统的硬件。
This article discusses the situation and exhibits on display during the 12th International Symposium and Technology Exhibition in Montreux, Switzerland (May 31-June 4, 1981), presenting the development of a video switching center that has entered the “ Video focus, combined effect ”of the new generation (fourth generation) view. The paper analyzes and compares the design ideas, advantages and disadvantages of several typical new products, and introduces the component-based and building-block design of switch center. The article also introduces the characteristics of the new generation of products pre-set, preview function; computer-aided production, electronic editing interface and the development of digital video effects (DVE) application. Finally, the article emphasizes the design of switching center should first strengthen the software design, and software design should be adapted to China’s national conditions, under the guidance of the software design unified planning system hardware.