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1. A New Edge-based Intra-field Interpolation Method for Deinterlacing Using Locally Adaptive-thresholded Binary Image.

Author

Dong-Ho Lee

Subjects
*NUMERICAL analysis, *PAPER, *COMPUTER simulation, *SIMULATION methods & models, *ELECTROMECHANICAL analogies, *COMPUTERS, *MATHEMATICAL models, *DEFECT correction methods (Numerical analysis), *MATHEMATICAL analysis
Abstract

This paper proposes a new method to improve re performance of intra-field interpolation which is the mos~ important element of deinterlacing method. Traditional edge- based methods were poor at determining accurate edge iirection which decides interpolation performance. The 7roposed method decides the direction and slope of edge based on locally adaptive-thresholded binary image to mprove efficiency and accuracy, and it also increased the ~orizontal size of search window to 15 for better direction ietermination at gentle slope. Compared to traditional edge- based methods, interpolation based on binary image, which is ,`enerated using the proposed method, leads to great erformance improvement. With computer simulations for a ~`ariety of images, this paper shows the new approach is much ~etter than traditional methods.. [ABSTRACT FROM AUTHOR]

Published
2008
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2. A Hands-Free Unit with Noise Reduction by Using Adaptive Beamformer.

Author

Kobayashi, Kazunori, Haneda, Yoichi, Furuya, Ken'ichi, and Kataoka, Akitoshi

Subjects
*NOISE, *PAPER, *NUMERICAL analysis, *COMPUTER simulation, *SIMULATION methods & models, *ELECTROMECHANICAL analogies, *COMPUTERS, *MATHEMATICAL models, *SOUND
Abstract

This paper presents an implementation of an ~daptive beamformer in a hands-free unit. The proposec~ ~daptive beamformer suppresses stationary noise an~ nterference sound. The adaptive beamformer and acoustic `cho canceller were implemented in a compact hands-free mit with a low-cost DSP. Experimental results demonstrate he noise reduction performance of the hands-free unit'. [ABSTRACT FROM AUTHOR]

Published
2008
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3. Numerical analysis of integrated liquid ramjet engine

Author

V. Babu, G. Raja Singh Thangadurai, T. Sundararajan, and B.S. Subhash Chandran

Subjects
Engineering, (+ mod 2N) operation, air intakes, Cold flows, Convergent-divergent nozzle, Coupled simulations, Coupling phenomenon, Numerical simulations, Ramjet operation, Sub-systems, Combustion, Combustion chambers, Combustors, Computer simulation, Flow simulation, Fluids, Intake systems, Mathematical morphology, Multitasking, Nozzles, Numerical analysis, Paper, Smoke, Thermochemistry, Ventilation exhausts, Ramjet engines, business.industry, Internal flow, Mechanical Engineering, General Chemical Engineering, Nozzle, Biomedical Engineering, General Physics and Astronomy, Computer Science Applications, Combustor, Supersonic speed, Air–fuel ratio, Electrical and Electronic Engineering, Aerospace engineering, business, Ramjet
Abstract

The numerical simulation of an integrated, liquid-fuelled ramjet engine comprising supersonic air intake, subsonic combustor and a convergent-divergent nozzle has been carried out and the results are discussed in this paper. These results include cold flow studies, heat addition in the combustor and full engine analysis with coupled simulation of supersonic air-intake and combustion chamber along with the nozzle. Overall ramjet operation depends on the performance of the air intake and the combustion chamber. The coupling phenomena are very dominant and performance of air intake is affected vastly by the combustor operation and vice versa. In this paper, a numerical analysis of integrated liquid ramjet engine considering coupling phenomena between various sub-systems viz., air intake, combustor and nozzle has been reported. � 2008, DESIDOC.

Published
2008