时间码和控制码

[中文适用范围]： 本国际标准规定了用于以每秒 60、59,94、50、30、29,97、25、24 和 23,98 帧的标称速率运行的电视、电影和伴音系统的数字时间和控制代码。该国际标准规定了时间地址、二进制组和标志位结构。此外，该标准还规定了二进制组标志分配、线性时间码传输和垂直间隔时间码传输。该国际标准定义了线性时间码（LTC）和垂直间隔时间码（VITC）的主要数据传输结构。该标准规定了所有视频格式的 LTC 调制和时序。该标准还仅定义了 525/59,94 和 625/50 模拟复合和分量系统的 VITC 调制和位置。 [外文原描述]： IEC 60461:2012 specifies a digital time and control code for use in television, film, and accompanying audio systems operating at nominal rate of 60, 59, 94, 50, 30, 29, 97, 25, 24 and 23,98 frames per second. This International Standard specifies a time address, binary groups, and flag bit structure. In addition, the standard specifies a binary group flag assignment, a linear time code transport, and a vertical interval time code transport. It cancels and replaces the third edition published in 2001, of which it constitutes a technical revision. It includes the following significant change with regard to the previous edition: The time code for progressive television systems with a frame rate greater than 30 frames per second is added. This bilingual version (2012-01) corresponds to the monolingual English version, published in 2010-03.