Browse Prior Art Database

Negotiation of Generic Image Attributes in the Session Description Protocol (SDP) (RFC6236) Disclosure Number: IPCOM000207562D
Original Publication Date: 2011-May-01
Included in the Prior Art Database: 2011-Jun-01
Document File: 46 page(s) / 49K

Publishing Venue

Internet Society Requests For Comment (RFCs)

Related People

I. Johansson: AUTHOR [+1]


This document proposes a new SDP attribute to make it possible to negotiate different image attributes, such as image size. The term image size is defined here, as it may differ from the physical screen size of, for instance, a hand-held terminal. As an example, it may be beneficial to display a video image on a part of the physical screen and leave space on the screen for other features such as menus and other info.

This text was extracted from an ASCII text file.
This is the abbreviated version, containing approximately 6% of the total text.

Internet Engineering Task Force (IETF)                      I. Johansson Request for Comments: 6236                                   Ericsson AB Category: Standards Track                                        K. Jung ISSN: 2070-1721                            Samsung Electronics Co., Ltd.                                                                 May 2011

                Negotiation of Generic Image Attributes in                  the Session Description Protocol (SDP)


   This document proposes a new generic session setup attribute to make    it possible to negotiate different image attributes such as image    size.  A possible use case is to make it possible for a low-end hand-    held terminal to display video without the need to rescale the image,    something that may consume large amounts of memory and processing    power.  The document also helps to maintain an optimal bitrate for    video as only the image size that is desired by the receiver is    transmitted.

Status of This Memo

   This is an Internet Standards Track document.

   This document is a product of the Internet Engineering Task Force    (IETF).  It represents the consensus of the IETF community.  It has    received public review and has been approved for publication by the    Internet Engineering Steering Group (IESG).  Further information on    Internet Standards is available in Section 2 of RFC 5741.

   Information about the current status of this document, any errata,    and how to provide feedback on it may be obtained at

Johansson & Jung             Standards Track                    [Page 1]
 RFC 6236                 Image Attributes in SDP                May 2011

 Copyright Notice

   Copyright (c) 2011 IETF Trust and the persons identified as the    document authors.  All rights reserved.

   This document is subject to BCP 78 and the IETF Trust's Legal    Provisions Relating to IETF Documents    ( in effect on the date of    publication of this document.  Please review these documents    carefully, as they describe your rights and restrictions with respect    to this document.  Code Components extracted from this document must    include Simplified BSD License text as described in Section 4.e of    the Trust Legal Provisions and are provided without warranty as    described in the Simplified BSD License.

Table of Contents

   1.  Introduction . . . . . . . . . . . . . . . . . . . . . . . . .  3

     1.1.  Requirements . . . . . . . . . . . . . . . . . . . . . . .  4

   2.  Conventions Used in This Doc...