本文件适用于正在使用的625线PAL和SECAM系统，以防出现宽屏信号 是广播公司要求的。它规定了宽屏信号信息、编码以及将编码信息合并到网络中的方式 625线制。宽屏幕信令信息包含关于传输信号的纵横比范围及其特性的信息 位置、字幕位置和相机/胶片模式。此外，EDTV和 包括环绕声。有些位留作将来使用。本文件规定了传输的信号。附录A给出了最低限度的操作规则 接收机显示格式和字幕的要求。附件B给出了建议。附件C给出了一个例子 版权信息指南。附录D描述了如何使用剩余的一个未使用位来传输 多位信息。

The present document is applicable to 625-line PAL and SECAM systems in use, in case, where wide screen signalling is required by the broadcasters.It specifies the wide screen signalling information, the coding and the way of incorporating the coded information into a 625-line system.The wide screen signalling information contains information on the aspect ratio range of the transmitted signal and its position, on the position of the subtitles and on the camera/film mode. Furthermore signalling for EDTV and for surround sound is included. Some bits are reserved for future use.The present document specifies the transmitted signal. Annex A gives the rules of operation for the minimum requirements for receiver display formats as well as for subtitling. Annex B gives recommendations. Annex C gives a guideline for copyright information. Annex D describes how the one remaining unused bit can be used to convey multi-bit information.