[AVTCORE] [Technical Errata Reported] RFC3550 (4192)

RFC Errata System <rfc-editor@rfc-editor.org> Thu, 04 December 2014 01:48 UTC

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Subject: [AVTCORE] [Technical Errata Reported] RFC3550 (4192)
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The following errata report has been submitted for RFC3550,
"RTP: A Transport Protocol for Real-Time Applications".

--------------------------------------
You may review the report below and at:
http://www.rfc-editor.org/errata_search.php?rfc=3550&eid=4192

--------------------------------------
Type: Technical
Reported by: Julius Friedman <juliusfriedman@gmail.com>

Section: 6.4.1

Original Text
-------------
sender's octet count: 32 bits
      The total number of payload octets (i.e., not including header or
      padding) transmitted in RTP data packets by the sender since
      starting transmission up until the time this SR packet was
      generated.  The count SHOULD be reset if the sender changes its
      SSRC identifier.  This field can be used to estimate the average
      payload data rate.

Corrected Text
--------------
sender's octet count: 32 bits
      The total number of payload octets 
      transmitted in RTP data packets by the sender since
      starting transmission up until the time this SR packet was
      generated.  The count SHOULD be reset if the sender changes its
      SSRC identifier.  This field can be used to estimate the average
      payload data rate.

Notes
-----
Where as payload octets is defined as the total number of data octets contained in a Rtp Packet minus the 12 Header octets for Rtp Packets.

Padding octets as well as octets which occur in the contributing source list should also be included as they may differ on a per packet basis and would make the total calculation invalid.

During TCP communication any application layer header should NOT be included in the total bytes count when including the header length.

Any Rtcp packet counters should include the total length of the packet (header, padding and any other data).

Instructions:
-------------
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--------------------------------------
RFC3550 (draft-ietf-avt-rtp-new-12)
--------------------------------------
Title               : RTP: A Transport Protocol for Real-Time Applications
Publication Date    : July 2003
Author(s)           : H. Schulzrinne, S. Casner, R. Frederick, V. Jacobson
Category            : DRAFT STANDARD
Source              : Audio/Video Transport
Area                : Real-time Applications and Infrastructure
Stream              : IETF
Verifying Party     : IESG