The IESG has received a request from the Audio/Video Transport Extensions WG (avtext) to consider the following document: - 'Support for Multiple Clock Rates in an RTP Session' <draft-ietf-avtext-multiple-clock-rates-10.txt> as Proposed Standard The IESG plans to make a decision in the next few weeks, and solicits final comments on this action. Please send substantive comments to the ietf@ietf.org mailing lists by 2013-10-22. Exceptionally, comments may be sent to iesg@ietf.org instead. In either case, please retain the beginning of the Subject line to allow automated sorting. Abstract This document clarifies the RTP specification when different clock rates are used in an RTP session. It also provides guidance on how to interoperate with legacy RTP implementations that use multiple clock rates. It updates RFC 3550. The file can be obtained via http://datatracker.ietf.org/doc/draft-ietf-avtext-multiple-clock-rates/ IESG discussion can be tracked via http://datatracker.ietf.org/doc/draft-ietf-avtext-multiple-clock-rates/ballot/ No IPR declarations have been submitted directly on this I-D.