Browsing by Author "Lin, HD"

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High-speed memory-saving architecture for the embedded block coding in JPEG2000
(2002)
Hsiao, YT
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Lin, HD
;
Lee, KB
;
Jen, CW
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電子工程學系及電子研究所
This paper presents a high-speed, memory-saving architecture for the embedded block coding algorithm in JPEG2000. The architecture is based on the proposed memory-saving algorithm that can achieve 4K bits reduction in the memory requirement (20% less than conventional approaches) without degrading the delay of the critical path. By exploiting the characteristic that the input symbols of the arithmetic coder in JPEG200 have highly skewed distribution, a simple renormalization strategy is adopted for the code-string register in our pipelined MQ Coder design to enhance the clock rate. The overall design is fully implemented in a chip using TSMC 0.35mum CMOS technology. The chip can operate up to 142 MHz at post-layout simulation and is capable of many applications.
Special issue on multimedia technology, systems, and applications - Guest editorial
(1997-08-01)
Sheu, BJ
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Ghanbari, M
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Lin, HD
;
Wu, CY
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交大名義發表
The influence of metal ions on the photocatalytic oxidation of 2-chlorophenol in aqueous titanium dioxide suspensions
(1999)
Lu, MC
;
Chen, JN
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Lin, HD
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環境工程研究所
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Institute of Environmental Engineering
This study investigated the effect of metal ions,such as Fe3+, Cu2+, Ni2+, Cr3+ and Zn2+, on the photocatalytic oxidation of 2-chlorophenol with illumination of 254 nm and 365 nm UV lights. Different metal ions have individual reduction potentials, and hence, their abilities to capture electrons also differ; the rates of 2-chlorophenol decomposition vary as well. This study was made to explore the relationships between the reduction potentials of different metal ions and their photocatalytic rates of 2-chlorophenol. Results show that when the reduction potential is greater than zero, regardless of illumination wavelength, the reaction rate increases with increasing reduction potentials of the metal ions. When the reduction potential is less than zero, the reaction rates are about the same for illumination of 365 nm or 254 nm UV lights.