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I-D ACTION:draft-lnt-avt-uxp-01.txt



A New Internet-Draft is available from the on-line Internet-Drafts directories.


	Title		: An RTP Payload Format for Erasure-Resilient 
                          Transmission of Progressive Multimedia Streams
	Author(s)	: M. Nguyen, G. Liebl, B. Wimmer, F. Burkert, J. Pandel
	Filename	: draft-lnt-avt-uxp-01.txt
	Pages		: 15
	Date		: 16-Aug-00
	
This document specifies an efficient way to ensure erasure-resilient
transmission of progressively encoded multimedia sources via RTP
using Reed-Solomon codes. The level of erasure protection can be
explicitly adapted to the importance of the respective parts in the
source stream, thus allowing a graceful degradation of application
quality with increasing packet loss rate on the network. Hence, this
type of unequal erasure protection (UXP) schemes is intended to cope
with the rapidly varying channel conditions on wireless access links
to the Internet backbone. Nevertheless, backward compatibility to
currently standardized non-progressive multimedia codecs is ensured,
since equal erasure protection (EXP) represents a subset of generic
UXP. By defining a comparably simple payload format, the proposed
scheme can be easily integrated into the existing framework for RTP.

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