RTP/I Payload Type Definition for Feedback Tools

This document specifies an application-level protocol (i.e., payload type) for feedback tools using the Real Time Protocol for Distributed Interactive Media (RTP/I). RTP/I defines a standardized framing for the transmis-sion of application data and provides protocol mechanisms that are universally needed for the class of distributed interactive media. A feedback tool is used in synchronous collaborative environments for permanent feedback about certain criteria (e.g., audio quality). This document specifies how to employ a feedback tool with RTP/I and defines application data units (ADUs) for feedback tool operations. This protocol definition allows standardized communication between different feedback tool implementations.