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김성철,오일균,장종환,Kim, Seong-Cheol,O, Il-Gyun,Jang, Jong-Hwan 한국정보처리학회 2000 정보처리논문지 Vol.7 No.4
In detection of a scene change of the moving pictures which has massive information capacity, the temporal sampling method has faster searching speed than the sequential searching method for the whole moving pictures, yet employed searching algorithm and detection interval greatly affect searching time and searching precision. In this study, the whole moving pictures were primarily retrieved by the temporal sampling method. When there exist a scene change within the sampling interval, we suggested a fast searching algorithm using binary searching and derived an equation formula to determine optimal primary retrieval which can minimize computation, and showed the result of the experiment on MPEG moving pictures. The result of the experiment shows that the searching speed of the suggested algorithm is maximum 13 times faster than the one of he sequential searching method.
노채균,김동희,남승식,김성철 嶺南大學校 工業技術硏究所 1995 工業技術硏究所論文集 Vol.23 No.2
As electionic application system such as data processing communication system and control measurement system get larger, high accuracy, high efficiency, small size and light weight for DC power supply are required. This paper processes a type of circuit that can be controlled by PWM and PFM-TRC method using Thyristor as switching element. And some data essential to system design are obtained by evaluating characteristic of the proposed circuit in terms of chopper frequency, energy storage period and load resistor using normalized parameter. The characteristic analysis of the proposed circuit is illustrated by experiment.