You are here:

An Evaluation of Video Compression Schemes for Teleteaching Applications
PROCEEDINGS

, Open Systems AG Zurich, Switzerland ; , , Swiss Federal Institute of Technology Zurich, Switzerland

EdMedia + Innovate Learning, in Montreal, Canada ISBN 978-1-880094-40-2 Publisher: Association for the Advancement of Computing in Education (AACE), Waynesville, NC

Abstract

Synchronous, interactive teleteaching is demanding with respect to required network bandwidth and short end-to-end delays. An uncompressed digital video, e.g., requires a data rate of 261 MBit/s. Video compression is a method to reduce required network bandwidth. Efficient video compression is almost lossless with respect to perceived video quality at the receiving site, but it is time intensive. In support of interactivity, however, response times must be short to allow participants to audio-visually communicate like being in the same room. This implies that the end-to- end communication delay should be less than 150 ms. This requirement puts a hard constraint on video compression since compression time is only one factor that adds to the overall end-to-end delay. We present a framework for the evaluation of video compression schemes. We define evaluation criteria such as compression delay and compression efficiency. The video compression schemes evaluated are Motion JPEG, MPEG, H.261 and H.263.

Citation

Stanovcic, O., Walter, T. & Plattner, B. (2000). An Evaluation of Video Compression Schemes for Teleteaching Applications. In J. Bourdeau & R. Heller (Eds.), Proceedings of ED-MEDIA 2000--World Conference on Educational Multimedia, Hypermedia & Telecommunications (p. 1831). Montreal, Canada: Association for the Advancement of Computing in Education (AACE). Retrieved July 4, 2022 from .

Keywords