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Proceedings Paper

A high-level simulator for the H.264/AVC decoding process in multi-core systems
Author(s): Florian H. Seitner; Ralf M. Schreier; Michael Bleyer; Margrit Gelautz
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Paper Abstract

ABSTRACT H.264 as a new-generation video coding algorithm is becoming increasingly important for international broadcasting standards such as DVB-H and DMB. In comparison to its predecessors MPEG-2 and MEPG-4 SP/ASP, H.264 achieves improved compression effciency at the cost of increased computational complexity. Real-time execution of the H.264 decoding process poses a large challenge on mobile devices due to low processing capabilities. Multi-core systems provide an elegant and power-effcient solution to overcome this performance limitation. However, effciently distributing the video algorithm among multiple processing units is a non-trivial task. It requires detailed knowledge about the algorithmic complexity, dynamic variations and inter-dependencies between functional blocks. The objective of this paper is an investigation on the dynamic behavior of the H.264 decoding process and on the interaction between the main decoding tasks in the context of multi-core environments. We use an H.264 decoder model to investigate the effciency of a decoding system under various conditions (e.g. different FIFO buffer sizes, bitstreams, coding features and bitrates). The gained insights are finally used to optimize the runtime behavior of a multi-core decoding system and to find a good trade-off between core usage and buffer sizes.

Paper Details

Date Published: 27 February 2008
PDF: 12 pages
Proc. SPIE 6821, Multimedia on Mobile Devices 2008, 682105 (27 February 2008); doi: 10.1117/12.766423
Show Author Affiliations
Florian H. Seitner, Vienna Univ. of Technology (Austria)
Ralf M. Schreier, Vienna Univ. of Technology (Austria)
Michael Bleyer, Vienna Univ. of Technology (Austria)
Margrit Gelautz, Vienna Univ. of Technology (Austria)

Published in SPIE Proceedings Vol. 6821:
Multimedia on Mobile Devices 2008
Reiner Creutzburg; Jarmo H. Takala, Editor(s)

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