ST 318:2015 - SMPTE Standard - Synchronization of 59.94- or 50-Hz Related Video and Audio Systems in Analog and Digital Areas — Reference Signals

This standard specifies the use of a derivative of a color black signal as a reference for the synchronization of all forms of composite or component, digital or analog equipment using a system standard related to 60/1.001 (nominal 59.94) or 50 Hz. It also provides the option for the reference signal to carry VITC. This will allow the reference to distribute local or UTC time data. — In the case of the reference for 60/1.001 Hz related signals, the signal may carry optionally a ten-field sequence identification signal. This facilitates interworking with equipment operating at related rates (e.g. 24/1.001 (nominal 23.98) Hz or 48 kHz). — Note: SMPTE ST 12-1 Annex B gives guidance on conversion of 24/1.001 (23.98) frames-per-second video to 30/1.001 (29.97) frames-per-second video using the ten-field sequence.