Tuyển tập báo cáo các nghiên cứu khoa học quốc tế ngành hóa học dành cho các bạn yêu hóa học tham khảo đề tài: Research Article Exploiting the Expressiveness of Cyclo-Static Dataflow to Model Multimedia Implementations | Hindawi Publishing Corporation EURASIP Journal on Advances in Signal Processing Volume 2007 Article ID 84078 14 pages doi 2007 84078 Research Article Exploiting the Expressiveness of Cyclo-Static Dataflow to Model Multimedia Implementations Kristof Denolf 1 Marco Bekooij 2 Johan Cockx 1 Diederik Verkest 1 3 4 and Henk Corporaal5 1 Nomadic Embedded Systems NES Interuniversity Micro Electronics Centre IMEC Kapeldreef75 3001 Leuven Belgium 2 NXP Research Systems and Circuits Prof. Holstlaan 4 5656 AE Eindhoven The Netherlands 3 Department of Electrical Engineering Katholieke Universiteit Leuven KU-Leuven 3001 Leuven Belgium 4 Department of Electrical Engineering Vrije Universiteit Brussel VUB 1050 Brussels Belgium 5 Faculty of Electrical Engineering Technical University Eindhoven Den Dolech 2 5612 AZ Eindhoven The Netherlands Received 14 September 2006 Revised 11 February 2007 Accepted 23 April 2007 Recommended by Roger Woods The design of increasingly complex and concurrent multimedia systems requires a description at a higher abstraction level. Using an appropriate model of computation helps to reason about the system and enables design time analysis methods. The nature of multimedia processing matches in many cases well with cyclo-static dataflow CSDF making it a suitable model. However channels in an implementation often use for cost reasons a kind of shared buffer that cannot be directly described in CSDF. This paper shows how such implementation specific aspects can be expressed in CSDF without the need for extensions. Consequently the CSDF graph remains completely analyzable and allows reasoning about its temporal behavior. The obtained relation between model and implementation enables a buffer capacity analysis on the model while assuring the throughput of the final implementation. The capabilities of the approach are demonstrated by analyzing the temporal behavior of an MPEG-4 video encoder with a CSDF graph. Copyright 2007 Kristof Denolf et al. This
