%% You should probably cite rfc8331 instead of this I-D.
@techreport{ietf-payload-rtp-ancillary-09,
    number =    {draft-ietf-payload-rtp-ancillary-09},
    type =      {Internet-Draft},
    institution =   {Internet Engineering Task Force},
    publisher = {Internet Engineering Task Force},
    note =      {Work in Progress},
    url =       {https://datatracker.ietf.org/doc/draft-ietf-payload-rtp-ancillary/09/},
    author =    {Thomas Edwards},
    title =     {{RTP Payload for SMPTE ST 291 Ancillary Data}},
    pagetotal = 18,
    year =      2017,
    month =     may,
    day =       12,
    abstract =  {This memo describes a real-time transport protocol (RTP) payload format for the Society of Motion Picture and Television Engineers (SMPTE) Ancillary data, as defined by SMPTE ST 291-1. SMPTE Ancillary 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).},
}