IEC 60461:2010

FOREWORD
INTRODUCTION
1 Scope
2 Normative references
3 Terms, definitions and reserved
4 Time representation in 30 frames per second and 60
   frames per second systems
5 Time representation in 25 frames per second and 50
   frames per second systems
6 Time representation in 24-frame systems
7 Structure of the time address and control bits
8 Linear time code application
9 Vertical interval application - Analogue television
   systems
10 Relationship between LTC and VITC
11 Progressive systems with frame rates greater than 30
   frames per second
Annex A (informative) - Explanatory notes
Annex B (informative) - Converting time codes when converting
                        video from 24 fps television systems
Bibliography

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.