E. P. J. TozerZetrox Broadcast Communications
2.5 Timecode
2.5.1 Introduction
Timecode is an essential component of the professional broadcast system, providing a reference and synchronising signal for audio and video programme material.
2.5.2 EBU and SMPTE, DF and NDF Timecodes
Timecode indicates time to video frame accuracy with a 24-hour range as HH:MM:SS:FF, typically displayed as either +/− 12 hours or 0-24 hours, i.e. 00:00:00:00 to 23:59:59:24(29) or − 12:00:00:00 to +11:59:58:24(29).
Timecode which counts 0 to 24 frames is variously referred to as EBU (European Broadcast Union), 25 frame or PAL timecode, and is used with 25 FPS (frames per second) video. Timecode which counts 0 to 29 FPS comes in two varieties, ‘Drop Frame’ (DF) ...
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