Negotiation of Generic Image Attributes in the Session Description Protocol (SDP) (RFC6236)
Original Publication Date: 2011-May-01
Included in the Prior Art Database: 2011-Jun-01
Internet Society Requests For Comment (RFCs)
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.
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 http://www.rfc-editor.org/info/rfc6236.
Jung Standards Track [Page 1]
RFC 6236 Image Attributes in SDP May 2011
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Table of Contents
1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . . 3
1.1. Requirements . . . . . . . . . . . . . . . . . . . . . . . 4
2. Conventions Used in This Doc...