Raptor Forward Error Correction Scheme for Object Delivery
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From: The IESG <email@example.com> To: IETF-Announce <firstname.lastname@example.org> Cc: Internet Architecture Board <email@example.com>, RFC Editor <firstname.lastname@example.org>, rmt mailing list <email@example.com>, rmt chair <firstname.lastname@example.org> Subject: Protocol Action: 'Raptor Forward Error Correction Scheme for Object Delivery' to Proposed Standard The IESG has approved the following document: - 'Raptor Forward Error Correction Scheme for Object Delivery ' <draft-ietf-rmt-bb-fec-raptor-object-10.txt> as a Proposed Standard This document is the product of the Reliable Multicast Transport Working Group. The IESG contact persons are Magnus Westerlund and Lars Eggert. A URL of this Internet-Draft is: http://www.ietf.org/internet-drafts/draft-ietf-rmt-bb-fec-raptor-object-10.txt
Technical Summary This document is an optional Building Block usable to fully define an RMT Transport Protocol. It fully-specifies a Forward Error Correction Code, called "Raptor", within the guidelines of draft-ietf-rmt-fec-bb-revised. It also specifies procedures and packet-header fields, as required by draft-ietf-rmt-fec-bb-revised. The combination of this document and draft-ietf-rmt-fec-bb-revised allows the implementation of an interoperable Forward Error Correction scheme usable in the context of an RMT transport protocol (e.g. LCT/ALC or NORM). Raptor is a fountain code, i.e., as many encoding symbols as needed can be generated by the encoder on-the-fly from the source symbols of a source block of data. The decoder is able to recover the source block from any set of encoding symbols only slightly more in number than the number of source symbols. The Raptor code described here is a systematic code, meaning that all the source symbols are among the encoding symbols that can be generated. Working Group Summary There is consensus in the WG to publish these documents. Document Quality The following independent standardization bodies have adopted the Raptor specification in a form functionally equal to draft-ietf-rmt-bb-fec-raptor-object-07: - 3GPP Multimedia Broadcast Multicast Service - Protocols and Codecs (TS26.346) - DVB IP Datacast over DVB-H: Content Delivery Protocols (CDP) - (DVB Blue Book A101, ETSI TS 102 472) Personell Lorenzo Vicisano is the Document Shepherd. Magnus Westerlund is the Responsible Area Director. Note to RFC Editor Abstract, first paragraph: OLD: This document describes a Fully-Specified FEC scheme, corresponding to FEC Encoding ID 1, for the Raptor forward error correction code and its application to reliable delivery of data objects. NEW: This document describes a Fully-Specified Forward Error Correction (FEC) scheme, corresponding to FEC Encoding ID 1, for the Raptor forward error correction code and its application to reliable delivery of data objects. Section 220.127.116.11, third paragraph: OLD: Note that the value of K is not necessarily the same for each source block of a object and the value of T' may not necessarily be the same for each sub-block of a source block. NEW: Note that the value of K is not necessarily the same for each source block of an object and the value of T' may not necessarily be the ^ same for each sub-block of a source block. Section 9.1: Move reference  from the normative list to informative reference list in section 9.2.