RFC 2029 (rfc2029) - Page 1 of 6

RTP Payload Format of Sun's CellB Video Encoding

Network Working Group                                      M. Speer
Request for Comment: 2029                                D. Hoffman
Category: Standards Track                    Sun Microsystems, Inc.
                                                       October 1996


            RTP Payload Format of Sun's CellB Video Encoding

Status of this Memo

   This document specifies an Internet standards track protocol for the
   Internet community, and requests discussion and suggestions for
   improvements.  Please refer to the current edition of the "Internet
   Official Protocol Standards" (STD 1) for the standardization state
   and status of this protocol.  Distribution of this memo is unlimited.

Abstract

   This memo describes a packetization scheme for the CellB video
   encoding. The scheme proposed allows applications to transport CellB
   video flows over protocols used by RTP.  This document is meant for
   implementors of video applications that want to use RTP and CellB.

1. Introduction

   The Cell image compression algorithm is a variable bit-rate video
   coding scheme.  It provides "high" quality, low bit-rate image
   compression at low computational cost.   The bytestream that is
   produced by the Cell encoder consists of instructional codes and
   information about the compressed image.

   For futher information on Cell compression technology, refer to [1].
   Currently, there are two versions of the Cell compression technology:
   CellA and CellB.  CellA is primarily designed for the encoding of
   stored video intended for local display, and will not be discussed in
   this memo.

   CellB, derived from CellA, has been optimized for network-based video
   applications.  It is computationally symmetric in both encode and
   decode.  CellB utilizes a fixed colormap and vector quantization
   techniques in the YUV color space to achieve compression.










Speer & Hoffman             Standards Track