本文件规定了用于计时、控制、编辑和同步的垫子数字代码和电影胶片调制方法。本文件还规定了代码与电影画面的关系。 本文档中描述了两种类型的代码。第一种类型C是连续代码，与IEC 60461中规定的连续代码非常相似。这种类型的代码可用于胶片在录制和复制时连续移动的情况。 第二种类型的代码，类型8，是一种非连续的块类型代码，由数据块组成，每个数据块本身是完整的，块之间有间隙。它的设计使代码可以在间歇胶片运动的设备上记录和播放，但仍然可以使用用于读取C型或连续时间代码的相同类型的电子设备进行解码。

This document specifies digital code for mats and modulation methods for motion-picture film to be used for timing, control, editing and synchronization purposes. This document also specifies the relationship of the codes to the motion picture frame. Two types of code are described in this document. The first type, Type C, is a continuous code which is very similar to the continuous code specified in IEC 60461. This type of code can be used in situations where the film is moving continuously at the time of both recording and reproduction. The second type of code, Type 8, is a non-continuous, block-type code, composed of blocks of data, each complete in itself, with gaps between the blocks. It is designed so that the code can be recorded and played back on equipment with intermittent film motion but still be decoded with the same type of electronic equipment used to read the Type C or continuous time code.