Information technology - generic coding of moving pictures and associated audio information - part 1 : systems amendment 1 : registration procedure for " copyright identifier " amendment 2 : registration procedure for " format identifier 信息技术.移动画面和有关音频信息通用编码.第1部分:系统.修改件1 :版权识别注册过程.修改件2 :格式识别注册过程