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国际电联无线电通信部门(ITU-R)等10A、10B工作组(WP10A、WP10B)1999年度会议于4月12日～16日在美国拉斯维加斯召开。会议通过了修改后的广播的定义:广播业务是指用于向公众提供的图像、声音、多媒体和数据业务、包括有条件接收和交互
The 1999 Annual Meetings of Working Groups 10A and 10B (WP10A, WP10B) of the ITU Radiocommunication Sector (ITU-R) were held in Las Vegas, USA from April 12 to April 16. The meeting adopted the definition of a modified broadcast: Broadcasting refers to the provision of images, sound, multimedia and data services to the general public, including conditional access and interaction