RTP Timestamp Frequency for Variable Rate Audio Codecs
draft-ietf-avt-variable-rate-audio-00

Document Type Expired Internet-Draft (avt WG)
Last updated 2004-10-19
Stream IETF
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This Internet-Draft is no longer active. A copy of the expired Internet-Draft can be found at
https://www.ietf.org/archive/id/draft-ietf-avt-variable-rate-audio-00.txt

Abstract

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.

Authors

Stephan Wenger (stewe@stewe.org)
Colin Perkins (csp@csperkins.org)

(Note: The e-mail addresses provided for the authors of this Internet-Draft may no longer be valid.)