Robust H.263 Video Coding for Transmission Over the Internet

        The widely popular World Wide Web along with advances in desktop computers has brought the world into a new age of computing and communications. Low bit-rate video applications across the Internet are quickly emerging. The ITU-T H.263 standard was designed for low bit-rate video conferencing across phone lines and is an ideal candidate to be extended for Internet video applications. A primary issue in transmitting compressed video streams over the Internet is to achieve fast recovery from packet losses while maintaining a smooth bandwidth profile. This paper focuses on the error robustness issue of compressed H.263 video streams. The traditional approach of inserting intra-coded frames increases the error resilience at the expense of bursty output traffic, lower picture quality, and uneven frame dropping. By extending the macroblock force update feature of the H.263 standard, we developed a scheme that complies with the standard and increases the robustness of the video stream. This macroblock updating scheme analyzes the temporal dependencies of macroblocks in successive frames and selectively updates the macroblocks which have the most impact on later frames. The performance evaluation of the proposed technique demonstrates that it achieves a good balance between error recovery speeds and video quality.

        IEEE Infocom '98 - The Conference On Computer Communications, v. 1-3: Gateway to the 21st Century, IEEE, NewYork, NY, p. 225-232

By: Marc Willebeek-LeMair, Zon-Yin Shae and Yuan-Chi Chang

Published in: RC20532 in 1996


This Research Report is available. This report has been submitted for publication outside of IBM and will probably be copyrighted if accepted for publication. It has been issued as a Research Report for early dissemination of its contents. In view of the transfer of copyright to the outside publisher, its distribution outside of IBM prior to publication should be limited to peer communications and specific requests. After outside publication, requests should be filled only by reprints or legally obtained copies of the article (e.g., payment of royalties). I have read and understand this notice and am a member of the scientific community outside or inside of IBM seeking a single copy only.

Questions about this service can be mailed to .