%% You should probably cite draft-ietf-codec-harmony instead of this I-D.
@techreport{valin-codec-prototype-01,
    number =    {draft-valin-codec-prototype-01},
    type =      {Internet-Draft},
    institution =   {Internet Engineering Task Force},
    publisher = {Internet Engineering Task Force},
    note =      {Work in Progress},
    url =       {https://datatracker.ietf.org/doc/draft-valin-codec-prototype/01/},
    author =    {Jean-Marc Valin and Koen Vos},
    title =     {{Prototype for IETF Interactive Audio Codec}},
    pagetotal = 12,
    year =      2010,
    month =     jul,
    day =       9,
    abstract =  {This document provides a quick overview of a prototype codec combining a linear prediction layer (SILK) with an MDCT-based layer (CELT). These codecs are used because of the authors' familiarity with the source code, but it does not prevent inclusion of code from other codecs as well. This is a work in progress.},
}