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This draft is a work item of the Audio/Video Transport Working Group of the IETF.
Title : RTP Timestamp Frequency for Variable Rate Audio Codecs
Author(s) : S. Wenger, C. Perkins
Filename : draft-ietf-avt-variable-rate-audio-00.txt
Pages : 6
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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