RFC 8331: RTP Payload for Society of Motion Picture and Television Engineers (SMPTE) ST 291-1 Ancillary Data

This memo describes a Real-time Transport Protocol (RTP) payload format for the Society of Motion Picture and Television Engineers (SMPTE) ancillary space (ANC) data, as defined by SMPTE ST 291-1. SMPTE ANC data is generally used along with professional video formats to carry a range of ancillary data types, including time code, Closed Captioning, and the Active Format Description (AFD).