A New Internet-Draft is available from the on-line Internet-Drafts directories.
Title : The Generalized Object Encoding (GOE) Approach for the Forward Erasure Correction (FEC) Protection of Objects and its Application to Reed- Solomon Codes over GF(2^^8)
Author(s) : Vincent Roca
Aline Roumy
Bessem Sayadi
Filename : draft-roca-rmt-goe-fec-00.txt
Pages : 18
Date : 2011-07-04
This document describes a Generalized Object Encoding (GOE) approach
for the protection of one or multiple objects, using one or several
FEC schemes, in the context of a Content Delivery Protocol (CDP) like
FLUTE/ALC, FCAST/ALC or FCAST/NORM. In RFC5052, the encoding process
is determined by the object (e.g., file) boundaries, i.e., the same
code is applied to the whole object that has been submitted to the
CDP by the user. The GOE approach instead decouples the definition
of source blocks that are FEC encoded from the natural object
boundaries. More precisely, either different portions of a given
object can be protected with different FEC codes (i.e., portions of
different nature and/or with different code rates), with a possible
overlapping, or at the opposite, different consecutive objects can be
protected globally through a single FEC encoding. If a GOE FEC
Scheme defines how to create and process repair packets using the GOE
approach, source objects must be encoded with a standard No-Code FEC
Scheme. Therefore the same flow of source packets can be shared by
different flows of repair packets, using different systematic GOE FEC
schemes. An additional benefit is that the GOE approach is backward
compliant since the source packets can be processed by receivers that
do not support any GOE FEC scheme by simply discarding the repair
packets. The present document first of all introduces the GOE
approach. It then defines the GOE Reed-Solomon FEC Scheme for the
particular case of Reed-Solomon codes over GF(2^^8) and no encoding
symbol group, the GOE equivalent to FEC Encoding ID 5 defined in
RFC5510.
A URL for this Internet-Draft is:
http://www.ietf.org/internet-drafts/draft-roca-rmt-goe-fec-00.txt
Internet-Drafts are also available by anonymous FTP at:
ftp://ftp.ietf.org/internet-drafts/
This Internet-Draft can be retrieved at:
ftp://ftp.ietf.org/internet-drafts/draft-roca-rmt-goe-fec-00.txt
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