本标准定义了活动格式描述（AFD）和条形码数据，用于通过 标准清晰度或高清晰度电视信号的生产和分发过程。AFD和 因此，条形数据最终将与它们描述的视频信号一起广播 包括对发射和数字电视接收器的参考，以确保发射源和数字电视接收器之间的兼容性 AFD和Bar数据及其最终用途。相关标准定义了如何将这些信息放入辅助数据包，并将KLV编码为 SMPTE元数据。附录C显示了标准之间的关系。

This Standard defines Active Format Description (AFD) and Bar Data for origination and conveyance through the production and distribution processes for standard definition or high definition television signals. AFD and Bar Data are intended to be ultimately broadcast with the video signals that they describe, therefore references to emission and DTV receivers are included to ensure compatibility between the origination of the AFD and Bar Data and its ultimate use.Associated standards define how this information is placed into ancillary data packets and is KLV coded as SMPTE metadata. Annex C shows the relationship among the standards.