Chang-Min Kim

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An field programmable gate array (FPGA) implementation of independent component analysis (ICA) algorithm is reported for blind signal separation (BSS) and adaptive noise canceling (ANC) in real time. In order to provide enormous computing power for ICA-based algorithms with multipath reverberation, a special digital processor is designed and implemented in(More)
This video introduces an elevating tangible block, G-raff which supports spatial interaction in a tabletop computing environment. The elevating head part of G-raff moves according to the given height and angle data. The two rollable metal tape structures creates large movements with a small volume block. Design details, key features and applications are(More)
We present an elevating tangible block, G-raffe, supporting 2.5-dimensional (2.5-D) interaction in a tabletop computing environment. There is a lack of specialized interface devices for tabletop computing environments. G-raffe overcomes the limitation of conventional 2-D interactions inherited from the vertical desktop computing setting. We adopted a(More)
This paper conceives a workcase classification method and implements it as a tool so as to be used in workflow mining systems. The method is for resolving the workcase classification problem issued for mining an activity firing or execution sequence of a workcase from monitoring and audit logs. That is, it finally generates a workcase classification(More)
A robust speech recognition system is reported based on mathematical models of auditory pathway and also their VLSI implementations. The developed auditory model consists of 3 components, i.e., nonlinear feature extraction at cochlea, binaural processing at superior olivery complex, and top-down attention through backward path. The feature extraction is(More)