next up previous contents
Next: RTCP Scaling Properties and Up: RTP Previous: RTCP Packet Format


There are quite a few payloads defined for RTP now, ranging from oens designed to carry video and audio formerly available on hardware CODECs only, such as MPEG, H.261, and the various CCITT/ITU voice coding schemes, through to some more generic payloads designed to carry redundantly coded audio such as that used by INRIA's Freephone, and UCL's RAT tools.

There has been some discussion in the IETF of a payload for multiplexed media within a single stream (such as the way the MOPEG systems stream of H221 framed stream emerge in a single bitstream from a hardware CODEC). To date, the disadvantages of this have outweighed any perceived advantage.