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Timing constraints of MPEG-2 decoding for high quality video: misconceptions and realistic assumptions

Fulltext:


Authors:

Damir Isovic, Gerhard Fohler, Liesbeth Steffens

Publication Type:

Conference/Workshop Paper

Venue:

Proceedings of the 15th International Euromicro Conference on Real-Time Systems (ECRTS 03)

Publisher:

IEEE

Abstract

Decoding MPEG-2 video streams imposes hard real-time constraints for consumer devices such as TV sets. The freedom of encoding choices provided by the MPEG-2 standard results in high variability inside streams, in particular with respect to frame structures and their sizes.In this paper, we identify realistic timing constraints demanded by MPEG-2 video decoding. We present results from a study of realistic MPEG-2 video streams to analyze the validity of common assumptions for software decoding and identifiy a number of misconceptions. Furthermore, we identify constraints imposed by frame buffer handling and discuss their implications on decoding architecture and timing constraints.We present actual demands based on quality considerations and derive timing constraints for their decoding. We show that standard, fixed timing constraints are restrictive and flexible ones are better suited for MPEG-2 software decoding. The constraints identified call for novel scheduling algorithms, as standard ones are only of limited suitability to the acutal constraints.

Bibtex

@inproceedings{Isovic431,
author = {Damir Isovic and Gerhard Fohler and Liesbeth Steffens},
title = {Timing constraints of MPEG-2 decoding for high quality video: misconceptions and realistic assumptions},
month = {July},
year = {2003},
booktitle = {Proceedings of the 15th International Euromicro Conference on Real-Time Systems (ECRTS 03)},
publisher = {IEEE},
url = {http://www.es.mdu.se/publications/431-}
}