Name: draft-ietf-avt-variable-rate-audio-00
Title: RTP Timestamp Frequency for Variable Rate Audio Codecs
State: Active
Authors: Stephan Wenger, Colin Perkins
Group: Audio/Video Transport (avt)
Date: 2004-10-19
This memo discusses the problems of audio codecs with variable external
sampling rates. Historically, for audio codecs, the RTP timestamp frequency
was chosen to match the sampling rate of the audio codec. However, this
choice is nowadays more difficult to justify, because of the advent of
audio codecs (and, even more important, practical use cases) that support
multiple sample rates and the switch between the sample rates during the
lifetime of an RTP session. This Internet draft addresses the problem by
suggesting that RTP Payload RFCs for such codecs to utilize a single, high,
unified RTP timestamp frequency.
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