EG 35:1999 - SMPTE Engineering Guideline - Time and Control Code Time Address Clock Precision for Television, Audio and Film

There is a desire for some applications to relate the time code time address to clock system time and to use this time code as a clock time reference. This guideline is specifically applicable to video systems operating at a frame rate of 29.97 Hz although its principles may be applicable to other systems. It outlines methods and procedures to achieve and maintain specified degrees of precision between a time code and clock time/date. — This guideline applies to systems where the time code is synchronized to video; however, it may also be relevant to time code synchronized to other references.