Last Call: <draft-ietf-codec-opus-12.txt> (Definition of the Opus Audio Codec) to Proposed Standard

The IESG <> Thu, 26 April 2012 20:20 UTC

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Subject: Last Call: <draft-ietf-codec-opus-12.txt> (Definition of the Opus Audio Codec) to Proposed Standard
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The IESG has received a request from the Internet Wideband Audio Codec WG
(codec) to consider the following document:
- 'Definition of the Opus Audio Codec'
  <draft-ietf-codec-opus-12.txt> as a 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 mailing lists by 2012-05-10. Exceptionally, comments may be
sent to instead. In either case, please retain the
beginning of the Subject line to allow automated sorting.


   This document defines the Opus interactive speech and audio codec.
   Opus is designed to handle a wide range of interactive audio
   applications, including Voice over IP, videoconferencing, in-game
   chat, and even live, distributed music performances.  It scales from
   low bitrate narrowband speech at 6 kb/s to very high quality stereo
   music at 510 kb/s.  Opus uses both linear prediction (LP) and the
   Modified Discrete Cosine Transform (MDCT) to achieve good compression
   of both speech and music.

The file can be obtained via

IESG discussion can be tracked via

The following IPR Declarations may be related to this I-D: