Internet Low Bit Rate Codec

Document Type Replaced Internet-Draft (individual)
Authors Alan Duric  , Steven Andersen 
Last updated 2002-07-05
Replaced by RFC 3951
Stream (None)
Intended RFC status (None)
Expired & archived
pdf htmlized (tools) htmlized bibtex
Stream Stream state (No stream defined)
Consensus Boilerplate Unknown
RFC Editor Note (None)
IESG IESG state Replaced by draft-ietf-avt-ilbc-codec
Telechat date
Responsible AD (None)
Send notices to (None)

This Internet-Draft is no longer active. A copy of the expired Internet-Draft can be found at


This document specifies a speech codec suitable for robust voice communication over IP. The codec is developed by Global IP Sound (GIPS) and is designed for narrow band speech and results in a payload bit rate of 13.867 kbit/s with an encoding frame length of 30 ms. The codec enables graceful speech quality degradation in the case of lost frames, which occurs in connection with lost or delayed IP packets.


Alan Duric (
Steven Andersen (

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