• Journal of the Korea Society of Computer and Information
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• v.20 no.1
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• pp.1-10
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• 2015

In this paper, we propose an efficient parallel implementation method of a widely used complex four-stage fire detection algorithm using a graphics processing unit (GPU) to improve the performance of the algorithm and analyze the performance of the parallel implementation method. In addition, we use seven different resolution videos (QVGA, VGA, SVGA, XGA, SXGA+, UXGA, QXGA) as inputs of the four-stage fire detection algorithm. Moreover, we compare the performance of the GPU-based approach with that of the CPU implementation for each different resolution video. Experimental results using five different fire videos with seven different resolutions indicate that the execution time of the proposed GPU implementation outperforms that of the CPU implementation in terms of execution time and takes a 25.11ms per frame for the UXGA resolution video, satisfying real-time processing (30 frames per second, 30fps) of the fire detection algorithm.

• Information and Communications Magazine
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• v.30 no.5
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• pp.51-58
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• 2013

본 논문에서는 차세대 지상파 DMB 방송 기술인 AT-DMB(Advanced Terrestrial Digital Multimedia Broadcasting) 기술의 내용과 AT-DMB 기반의 지역한정 데이터방송 서비스 기술에 대해 기술하고, 실제 필드에서 수행된 실험방송 내용에 대해서도 소개한다. AT-DMB 기술은 기존의 T-DMB 방송과 역호환성(backward compatibility)을 유지하면서 전송용량을 T-DMB 대비 최대 2배까지 증대시킨 기술이다. 추가확보된 전송용량에 새로운 채널을 할당하거나 MPEG-4 SVC(Scalable Video Coding) 기술을 이용하여 기존 T-DMB의 QVGA(320x240) 화질 대신 VGA(640x480)급의 고화질을 제공할 수 있다.

• 한국정보디스플레이학회:학술대회논문집
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• 2004.08a
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• pp.395-398
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• 2004

We developed an a-Si TFT-LCD panel with integrated gate driver circuit using a standard 5-MASK process. To minimize the effect of the a-Si TFT current and LC's capacitance variation with temperature, we developed a new a-Si TFT circuit structure and minimized coupling capacitance by changing vertical architecture above gate driver circuit. Integration of gate driver circuit on glass substrate enables single chip and 3-side free panel structure in a-Si TFT-LCD of QVGA(240$^{\ast}$320) resolution. And using double ASG structure the dead space of TFT-LCD panel could be further decreased.

• Journal of Korea Multimedia Society
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• v.19 no.5
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• pp.856-864
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• 2016

Recently, HD transmission was commonplace in the case of the terrestrial broadcasting, furthermore, 4k UHD broadcasts are also being pilot and such as HD contents are common even in smart-phones. Like this, through both the content and audience are in the situation to take advantage of the HD mobile TV, only QVGA video contents are being transmitted in the terrestrial DMB broadcasting. In this paper, introduction plan of HD DMB service for activation of DMB industry will be described in terms of technical, institutional, and policy to overcome the limitations of such as DMB broadcasting. Due to the introduction of HD DMB, high quality contents will be provided to audience and the advertising revenue DMB broadcasters increased so that the market share of DMB in mobile broadcasting be recovered.

• 한국정보디스플레이학회:학술대회논문집
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• 2007.08b
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• pp.1081-1084
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• 2007

System on Panel (SOP) can integrate many functions by Thin Film Transistor (TFT) circuits on an insulator substrate without using external driver LSIs. However, to make practical SOP has become more and more difficult because of rapid cost reduction of the driver LSIs. This paper will review the circuit design technology trend for SOP and introduce an example of a practical SOP, 2.0inch QVGA full color active matrix OLED with 8bit source driver.

• JSTS:Journal of Semiconductor Technology and Science
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• v.14 no.2
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• pp.246-251
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• 2014

In this paper, a high-speed CMOS Image Sensor (CIS) based on a 10-bit two step Single Slope A/D Converter (SS-ADC) is proposed. The A/D converter is composed of both 5-bit coarse ADC and a 6-bit fine ADC, and the conversion speed is 10 times faster than that of the single-slope A/D convertor. In order to reduce the pixel noise, further, a Hybrid Correlated Double Sampling (H-CDS) is also discussed. The proposed A/D converter has been fabricated with 0.13um 1-poly 4-metal CIS process, and it has a QVGA ($320{\times}240$) resolution. The fabricated chip size is $5mm{\times}3mm$, and the power consumption is about 35 mW at 3.3 V supply voltage. The measured conversion speed is 10 us, and the frame rate is 220 frames/s.

• 한국정보디스플레이학회:학술대회논문집
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• 2008.10a
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• pp.1631-1633
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• 2008

We demonstrate 4-in QVGA active-matrix electrophoretic display based on ink-jet printed organic transistors on glass substrates. Our TFT array had a bottom-gate, bottom-contact device architecture. The organic semiconductor and gate dielectric were solution processed. The field-effect mobility of the printed devices, calculated in the saturation region, was $0.1{\sim}0.3cm^2/Vs$ at Vg=-20 V.

• 한국정보디스플레이학회:학술대회논문집
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• 2008.10a
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• pp.127-130
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• 2008

A 2.2" QVGA($320{\times}240$) 262,114 color AMOLED module has been developed using digital driving methodology. In this paper, we discuss the development of diver IC which is applied to Digital AMOLED module. Technologies for low cost IC structure and image quality enhancement are presented.

• 한국정보디스플레이학회:학술대회논문집
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• 2006.08a
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• pp.1086-1089
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• 2006

We have developed 2.4" QVGA wide color gamut LCD module using RGB-LED backlight. The color gamut is achieved 100% of NTSC compared to 70% of NTSC when used with White-LED backlight. But RGB LED backlight is difficult to maintain its color balance since RGB LED is gradually degraded by the change of ambient temperature and a long term aging characteristic, etc. This paper describes a feasibility study of our optical feedback system developed for preventing such a color shift.

• Proceedings of the Korean Institute of Electrical and Electronic Material Engineers Conference
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• 2003.04a
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• pp.173-176
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• 2003

Microdisplay with transmissive to realize the virtual display con make the large screen with small devices, so virtual image realization technology have been developed by using 0.24" microdisplay panel. We developed microdisplay controller with using Kopin panel. microdisplay will be used in several telecommunication terminal which can transfor text message and still/moving images.