Abstract 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 handheld 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.
RFC 6236-2011 history
2011RFC 6236-2011 Negotiation of Generic Image Attributes in the Session Description Protocol (SDP)