• The Transactions of the Korea Information Processing Society
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• v.7 no.1
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• pp.266-272
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• 2000

The square-based multiplication using look-up table simplifies the process and speeds-up the operating speed. However, the look-up table size increases exponentially as bit size increases. Recently, Wey and Shieh introduced a noble design of square generator circuit using a folding approach for high-speed performance applications. The design uses the ones complement values of ROM addresses to fold the huge look-up ROM table repeatedly such that a much smaller table can be sufficient to store the squares. We present new folding techniques that do not require a ones complement part, one of three major parts in the Wey and Shiehs method. Also the proposed techniques reduce the bit size of partial sums such that the hardware implementation be simplified and the performance be enhanced.

• Journal of the Korean Graphic Arts Communication Society
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• v.20 no.1
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• pp.79-90
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• 2002

Recently, the research about color matching for the input/output devices of printing process is progressing rapidly by the digitization. The calibration method of flatbed scanner widely used as an input device for prepress process is especially important for color proofing of high quality color prints. In this paper, scanner calibration method using 3-dimensional look-up table and tetrahedral interpolation was examined and analysed comparatively on the three kinds of original copies, such as photograph, dye sublimation proof and ink jet print for IT8.T/2 target.

• Journal of information and communication convergence engineering
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• v.7 no.2
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• pp.219-222
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• 2009

An efficient interpolation FIR filter structure for high-density and low-power electronic devices is proposed. The proposed structure is based on polyphase decomposition property and look-up table method. By computer-aided design simulations, it is shown that the use of the proposed method can result in reduction in the number of gates by 54% and can reduce power consumption by 9%.

• The Journal of Korean Institute of Communications and Information Sciences
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• v.21 no.10
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• pp.2653-2659
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• 1996

In this paper, DC-free and minimum bandwidth binary line codes with look-up table are proposed and their performances are analyzed. As results of performance analysis, the proposed codes are shown to have spectral nulls at DC and Nyquist frequency. Among the proposed codes, binary line codes of which both codeword digital sum and alternating digital sum are zero have lower code rate but better spectral characteristics. Furthermore, binary line codes which consist of all codewords including those with nonzero digital sum and alternating digital sum have worese spectral characteristics but higher code rate.

• 제어로봇시스템학회:학술대회논문집
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• 1995.10a
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• pp.127-130
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• 1995

Fuzzy controllers have proven to be powerful in controlling dynamic processes where mathematical models are unknown or intractable and ill-defined. The way of improving the performance of a fuzzy controller is based on making up rules, constructing membership functions, selecting a defuzzification method and adjusting input-output scaling factors. But there are many difficulties in tuning those to optimize a fuzzy controller. So, in this paper, we propose the look-up table based self-orgenizing fuzzy controller (LSOFC) which optimizes look-up values resulting from the above fuzzy processes. We use the plus-minus tuning method(PMTM), scanning the value through the processes of addition and subtraction. Simulation results demonstrate that the performance of LSOFC is far better than that of a non-tuning fuzzy controller.

• JSTS:Journal of Semiconductor Technology and Science
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• v.13 no.5
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• pp.415-422
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• 2013

In this paper, we present Self-Checking look-up-table (LUT) based on Scalable Error Detection Coding (SEDC) scheme for use in fault-tolerant reconfigurable architectures. SEDC scheme has shorter latency than any other existing coding schemes for all unidirectional error detection and the LUT execution time remains unaffected with self-checking capabilities. SEDC scheme partitions the contents of LUT into combinations of 1-, 2-, 3- and 4-bit segments and generates corresponding check codes in parallel. We show that the proposed LUT with SEDC performs better than LUT with traditional Berger as well as Partitioned Berger Coding schemes. For 32-bit data, LUT with SEDC takes 39% less area and 6.6 times faster for self-checking than LUT with traditional Berger Coding scheme.

• Journal of the Institute of Electronics Engineers of Korea SP
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• v.41 no.6
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• pp.33-41
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• 2004

This paper proposes a color matching 3D look-up table simplifying the complex color matching procedure between a monitor and a mobile display device. In other to perform color matching, it is necessary to process color of image in the device independent color space like CIEXYZ or CIELAB. To obtain the data of the device independent color space from that of the device dependent RGB color space, we must perform display characterizations. LCD characterization error using S-curve model is larger than tolerance error since LCD is more nonlinear than CRT. This paper improves the S-curve model to have smaller characterization error than tolerance error using the electro-optical transfer functions of X, Y, and Z value. We obtained images having higher color fidelity on mobile display devices through color matching experiments between monitor and mobile display devices. As a result of this experiments, we concluded that the color matching look-up table with 64(4${\times}$4${\times}$4) is the smallest size allowing characterization error to be acceptable.

• The Journal of Korean Institute of Communications and Information Sciences
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• v.30 no.4C
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• pp.239-246
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• 2005

In this paper. we generate a virtual right image corresponding to the input left image by using given RGB texture data and 8 bit gray scale depth data. We first transform the depth data to disparity data and then produce the virtual right image with this disparity. We also proposed a stereo image synthesis algorithm which is adaptable to a viewer's position and an real-time processing algorithm with a fast LUT(look up table) method. Finally, we could synthesize a total of eleven stereo images with different view points for SD quality of a texture image with 8 bit depth information in a real time.

• Proceedings of the Acoustical Society of Korea Conference
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• spring
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• pp.255-258
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• 1999

본 논문에서는 파동 방정식으로부터 클래식 기타의 Physical 모델을 유도해 낸 후 이를 구현하였다. 이러한 모델을 이용해 별도의 음원 데이터를 사용하지 않고 현재 전자 음악에서 일반적으로 사용되는 table look-Up 방식보다 효율적으로 악기 음을 함성 할 수 있도록 하였다. 파동 방정식은 현의 장력, 길이 및 질량 데이터를 이용해 현의 움직임을 표현한 것이며 이 식으로부터 Fourier Series를 유도하고 다시 Z 변환을 거쳐 현의 운동을 모델링하였다. 이 과정에서 현의 양끝에서 반사되는 신호의 크기를 모델링에 포함 시켰다. 이러한 현의 모델은 모든 종류의 현악기에 공통으로 적용될 수 있으며 현의 장력 길이, 질량 데이터를 변화해 다양한 현의 특성들을 모델링 할 수 있다. 또 음 합성을 위해 현의 초기 상태 및 연속되는 입력 데이터를 바꿔 클래식 기타의 다양한 음들을 합성 할 수 있다. 클래식 기타의 Physical 모델을 평가하기 위해, 실제 악기 음 및 table look-up 방식으로 합성된 음들을 녹음해 서로 비교하였다. 시간 및 주파수 도메인 상에서 비교가 이뤄 졌으며 table look-up 합성 방식에서 모든 주파수대가 동일하게 감소하고 비슷한 음역에서 음 높이에 적합한 배음 주파수 비율을 조절할 수 없는 등, 각 을의 특성들을 정확히 묘사할 수 없는 문제점을 극복할 수 있었다.

• Journal of IKEEE
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• v.3 no.2 s.5
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• pp.276-284
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• 1999

In this paper, we propose a new technique which allows to store the pre-scaling constants directly in a table thus eliminating the cycle for computing pre-scaling constants. Especially we analyzed the range of pre-scalingconstants and rearranged them in a carry-save form using two look-up tables so that the size of the tables can be reduced significantly. The resulting scheme is compared with the previously developed method and shown to be effective with respect to area and time to implement the high-radix divider.