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Proceedings Paper

Real-time aware rendering of scalable arbitrary-shaped MPEG-4 decoder for multiprocessor systems
Author(s): Milan Pastrnak; Peter H. N. de With; Jef van Meerbergen
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Paper Abstract

The MPEG-4 video standard extends the traditional frame-based processing with the option to compose several video objects (VO) superimposed on a background sprite image. In our previous work, we presented a distributed, multiprocessor based, scalable implementation of an MPEG-4 arbitrary-shaped decoder, which forms together with the background sprite decoder an essential part for further scene rendering. For control of the multiprocessor architecture, we have constructed a Quality-of-Service (QoS) management that monitors the availability of required data and distributes the processing of individual tasks with guaranteed or best-effort services of the platform. However, the proposed architecture with the combined guaranteed and best-effort services poses problems for real-time scene rendering. In this paper, we present a technique for proper run-time rendering of the final scene after decoding one VO Layer. The individual video-object monitors check the data availability and select the highest quality for the final scene rendering. The algorithm operates hierarchically both at the scene level and at the task level of the video object processing. Whereas the earlier work on scalable implementation concentrated only on guaranteed services, we now introduce a new element in the system architecture for the real-time control and fall back mechanism of the best-effort services. This element is based on first, controlling data availability at task level, and second, introducing the propagation service to QoS management. We present our simulation results in the comparison with the standard "frame-skipping" technique that is the only currently available solution to this type of rendering a scalable processing.

Paper Details

Date Published: 26 February 2007
PDF: 9 pages
Proc. SPIE 6496, Real-Time Image Processing 2007, 64960D (26 February 2007); doi: 10.1117/12.704013
Show Author Affiliations
Milan Pastrnak, Philips Research Europe, Eindhoven (Netherlands)
Eindhoven Univ. of Technology (Netherlands)
Peter H. N. de With, Eindhoven Univ. of Technology (Netherlands)
LogicaCMG Nederland B.V. (Netherlands)
Jef van Meerbergen, Philips Research Europe, Eindhoven (Netherlands)
Eindhoven Univ. of Technology (Netherlands)

Published in SPIE Proceedings Vol. 6496:
Real-Time Image Processing 2007
Nasser Kehtarnavaz; Matthias F. Carlsohn, Editor(s)

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