PDC
noun [ U ] uk/ˌpiː.diːˈsiː/ us/ˌpiː.diːˈsiː/
节目传送控制（一种自动开始和停止录制视频的系统，使用电视节目开始和结束时发出的特殊信号，programme delivery control的缩写）
abbreviation for programme delivery control: a system for starting and stopping a video recording automatically, using special signals broadcast at the beginning and end of a television programme