Paul M. Chau

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A new realt ime IIR filter s t ruc tu re is p resented tha t possesses exact phase l inear i ty with 10 1000 t imes fewer general multiplies t han conventional FIR filters of s imilar performance a n d bet ter magni tude character is t ics t han equir ipple o r maximally flat g r o u p delay IIR filters. This s t ruc tu re is based on a novel technique(More)
This paper is concerned with multiprocessor implementations of embedded applications specified as iterative dataflow programs, in which synchronization overhead tends to be significant. We develop techniques to alleviate this overhead by determining a minimal set of processor synchronizations that are essential for correct execution. Our study is based in(More)
An approach toward path-oriented timing-driven placement is proposed. We first transform the placement with timing constraints to a Lagrange problem. A primal-dual approach is used to find the optimal relative module locations. In each primal dual iteration, the primal problem is solved by a piecewise linear resistive network method, while the dual process(More)
An area and computational-time efficient turbo decoder implementation on a reconfigurable processor is presented. The turbo decoder takes advantage of the latest sliding window algorithms to produce a design with minimal storage requirements as well as offering the ability to configure key system parameters via software. The parameter programmability allows(More)
In this article, we present the BinDCT algorithm, a fast approximation of the Discrete Cosine Transform, and its efficient VLSI architectures for hardware implementations. The design objective is to meet the real-time constrain in embedded systems. Two VLSI architectures are proposed. The first architecture is targeted for low complexity applications such(More)
Quality assessment is crucial to developments of video communication systems. While subjective test yields most accurate results, its expensive cost and human biasness make it an unsatisfactory figure of merit. The peak-signal to noise ratio (PSNR), the most acceptable objective video quality assessment metric, is based on error sensitivity; its failure to(More)