ITU-R BT.1366-3 PDF

Part 1 of this Recommendation defines a time and control code for use in television, film and accompanying audio systems operating at 60, 59.94, 50, 30, 29.97, 25, 24 and 23.98 frames/s (fps). Section 5 describes the structure of the time address and control bits of the code and sets guidelines for storage of user data in the code. Defined in this Recommendation is the modulation method for LTC, and the modulation method for inserting the time code into the vertical interval of a television signal

Part 2 of this Recommendation defines a transmission format for conveyance of linear (LTC) or vertical interval (VITC) time code data formatted according to Part 1 in 8- or 10-bit serial digital interfaces according to Recommendations ITU-R BT.656, ITU-R BT.799, ITU-R BT.1120 and ITU-R BT.2077.

Part 3 of this Recommendation specifies time code formats with the frame counts 72, 96, 100 and 120 and the frame count 120 with drop-frame compensation, commonly known as High Frame Rates (HFR). This also specifies a transmission format for conveyance of the time code and frame count in the ancillary data space of serial digital interfaces.