• Proceedings of the IEEK Conference
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• 2001.06d
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• pp.199-202
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• 2001

A current TV-OUT format is quite different from that of HDTY or PC monitor in encoding techniques. In other words, a conventional analog TV uses interlaced display while HDTV or PC monitor uses Non-interlaced / Progressive-scanned display. In order to encode image signals coming from devices that takes interlaced display format for progressive scanned display, a hardware logic in which scanning and interpolation algorithms are implemented is necessary. The ELA (Edge-Based Line Average) algorithm have been widely used because it provided good characteristics. In this study, the ADI(Adaptive De-interlacing Interpolation) algorithm using to improve the algorithm which shows low quality in vertical edge detections and low efficiency of horizontal edge lines. With the De-interlacing ASIC chip that converts the interlaced Digital YUV to De-interlaced Digital RGB is designed. The VHDL is used for chip design.

• Journal of the Institute of Electronics Engineers of Korea SP
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• v.40 no.5
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• pp.322-331
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• 2003

Advances of high-definition television(HDTV) and personal computers call for the mutual conversion between interlaced signal and progressive signal. Especially, deinterlacing which is known as an interlaced to progressive conversion has been recently required and investigated. In this paper, we propose new deinterlacing algorithm considering sub-pixel motion information. In order to reduce the error of motion estimation, we analyze the effect of inaccurate sub-pixel motion information and model it as zero-mean Gaussian noises added respectively to each low resolution image(field). The error caused by inaccurate motion information is reduced by determining regularization parameter according to the error of motion estimation in each channel. The validity of the proposed algorithm is demonstrated both theoretically and experimentally in this paper.

• Journal of IKEEE
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• v.7 no.2 s.13
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• pp.197-209
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• 2003

A current TV out format is quite different from that of HDTV or PC monitor in encoding techniques. In other words, a conventional analog TV uses interlaced display while HDTV or PC monitor uses Non-interlaced / Progressive-scanned display. In order to encode image signals coming from devices that takes interlaced display format for progressive scanned display, a hardware logic in which scanning and interpolation algorithms are implemented is necessary. The ELA(Edge-Based Line Average) algorithm have been widely used because it provided good characteristics. In this study, the ADI(Adaptive De-interlacing Interpolation) algorithm using to improve the ELA algorithm which shows low quality in vertical edge detections and low efficiency of horizontal edge lines. With the De-interlacing ASIC chip that converts the interlaced Digital YUV to De-interlaced Digital RGB is designed. The VHDL is used for chip design.

• Journal of IKEEE
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• v.2 no.2 s.3
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• pp.225-232
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• 1998

Currently NTSC, PAL, and SECOM are widely used for TV broadcasting systems. In Korea, NTSC has been used to reduce transmission bandwidth and broadband flickers using the Interlaced scanning method. Image data in the Interlaced scanning method require De-interlacing compensation for PC-based multimedia applications. The existing compensation algorithms such as ZOI, FOI, and ELA provieds simple computations and effective image compensation while the PSNR is low and horizontal and vertical edges are hardly detected. In this paper, the ADI(Adaptive De-Interlacing) algorithm that can increase PSNR and detect horizontal and vertical edges is proposed and a hardware system is implemented using three ACTEL 1020B FPGA chips. The system consists of the algorithm part implemented using two FPGAs and the memory control part implemented using rest one. Also the system operation is investigated for real time processing.

• 한국정보디스플레이학회:학술대회논문집
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• 2008.10a
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• pp.765-768
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• 2008

To make 3D camera system, we check the possibility of advanced range camera module based on measuring the time delay of modulated infrared light, using a single detector chip fabricated on standard CMOS process. To depth information, electronic shutter and interlaced scanning method of 2D sensor is needed. Especially, we design "lens system, illumination unit" and review simulation result.

• 한국정보디스플레이학회:학술대회논문집
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• 2009.10a
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• pp.478-480
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• 2009

This experiment implemented a laser projection system that used the 2D MEMS scanner as the driving method for the display device. The 2D MEMS scanner, which can scan the images horizontally and vertically, was applied to drive the projection system using the interlaced scanning method. The laser was directly modulated to implement the grayscale and the images were WVGA resolution quality.

• Journal of Korea Game Society
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• v.9 no.4
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• pp.89-96
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• 2009

In general, the size of volume data is large since it has logical 3D structure so it takes long time to manipulate. Much work has been done to improve processing speed of volume data. In this paper, we propose a interlaced scanning volume rendering that reduce computation time by using temporal coherence with minimum loss of image quality. It renders a current frame by reusing information of previous frame. Conventional volume raycasting renders each frame by casting rays on every pixels. On the other hand, our methods divided an image into n-pixel blocks, then it casts a ray on a pixel of a block per each frames. Consequently, it generates an image by accumulating pixel values of previous n frames. The quality of rendered image of our method is better than that of simple screen space subsampling method since it uses afterimage effect of human cognitive system, and it is n-times faster that the previous one.

• Proceedings of the Korean Society of Broadcast Engineers Conference
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• 2001.11b
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• pp.143-146
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• 2001

HDTV(high-definition television)와 개인용 컴퓨터의 발전에 따라 비월주사(interlaced scanning) 방식의 신호와 순차주사(progressive scanning) 방식의 신호 상호간의 변환에 대한 요구가 점점 늘어나고 있다. 이에 따라 비월주사 방식을 순차주사 방식으로 바꾸어주는 순차주사화(deinterlacing)가 활발히 연구되고 있다. 본 논문에서는 부화소(sub-pixel) 단위의 움직임 정보를 고려한 영상재결합 방법을 기반으로 한 순차주사화 알고리즘을 제안한다. 그러나 국부 움직임이 있는 영역에서는 영상재결합이 효과적이지 않으므로 적절한 문턱값을 이용하여 이러한 영역을 결정하고 에지를 이용한 보간 방법으로 순차주사화 한다. 또한 잘못된 움직임 추정으로 야기되는 문제들을 해결하기 위해, 각 영역과 입력 영상에 따라 다른 움직임 에러를 고려해서 정규화 값(regularization parameter)을 결정함으로 움직임 에러를 효율적으로 제거하였다 제안된 방법은 주관적 측면과 객관적인 측면에서 모두 우수한 결과를 실험적으로 보였다.

• Proceedings of the KIEE Conference
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• 2007.10a
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• pp.275-276
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• 2007

본 논문에서는 AC-PDP내에서 고화질의 영상을 표현하고자한다. PDP구동방법중의 하나인 ADS방식을 보면 Reset, Address, Sustain의 세부분으로 나뉜다. 이 같은 ADS구동에 있어서 각 구간마다 제안된 시간을 이용한다. Reset구간에서는 각각의 Call을 균일하게 하고, Address구간에서는 Call의 On/off를 결정한다. Sustain구간 선택된 셀을 나타낸다. 이 같은 ADS방식에서 Addressing방법에서 Line-by-Line Scanning을 방법을 이용한다. 라인을 순차적으로 스캔함으로써 시간이 일정해진다. 라인의 순서를 홀수라인과 짝수라인으로 구분하여 각각의 라인에서 생기는 준비기간 동안 시간을 중복으로 사용함으로서 어드레싱시간을 감소시킬 수 있다 이를 구현하기 위해서 interlaced Line-by-Line Scanning을 이용한다.

• The Journal of Korean Institute of Communications and Information Sciences
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• v.19 no.10
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• pp.1900-1909
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• 1994

Although the existing NTSC TV standard is highly sophisticated, it has some inherent problems. One of these problems is interlaced scanning, which yields a poor result in terms of the vertical picture resolution. In this paper, we have proposed the interlace to progressive conversion method using the pseudomedian filters. Since the proposed method is processed in the intra field is different from the conventional method using the median filter, it is implemented without using field memory and its performance is same or nearly the same as the corresponding performance of the median filtering method. The performance of the proposed method has been compared with that of conventional methods through computer simulation.