CCIR考虑到:(a)在数字演播室标准中,如有尽量多的主要参数值对525行和625行制式是共同的,将对电视广播工作者和节目制作者有明显的益处;(b)在世界范围内兼容的数字方法将使设备的开发具有许多通用的特点,使运行经济并方便国际间的节日交换;(c)希望兼容的数字编码标准是一个可扩展的系列。此系列的各档次能适应不同的质量 The CCIR takes into account: (a) that in the case of digital studio standards, the largest number of major parameter values ​​common to the 525 and 625 lines would have significant benefits for television broadcasters and program producers; (b) ) The worldwide compatibility of digital methods will enable the development of equipment with many common features that make it economical to run and facilitate international exchange of festivals; (c) It is expected that a compatible digital coding standard will be an extensible series. The grades of this series can adapt to different qualities