• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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• 2011.10a
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• pp.938-941
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• 2011

A docking station design using portable media player for receiving and storing in digital broadcasting is presented in this paper. The receiving and storing for digital broadcasting contents is equipped with setup box. That enables to be removable and portable with multimedia player, and the portable media player is driving by Android operating system. The results of the implementation, this system enables to receive digital broadcasting, DMB, satellite broadcasting and territory broadcasting, and to store video image in real time.

• Korea Multimedia Society
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• v.22 no.2
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• pp.19-24
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• 2018

• Journal of the Korean Society for Precision Engineering
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• v.20 no.4
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• pp.183-188
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• 2003

Particulate contamination is known to be a significant cause of failures of removable storage media. In this work, the effect of particles on the surface damage of removable hard disk media was investigated. The particles of different materials and size were introduced to the Head Disk Interface (HDI) using a particle injection system. It was round that the particles of particulate size and property serious damaged the media. This study showed that cleaning pad is effective for reducing particle contamination, except fer the particles of specific size and property. As a means to remove the particles of specific sire. the concept of using a stepped taper at the leading edge of the slider is proposed.

• Proceedings of the Korean Society of Precision Engineering Conference
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• 2002.10a
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• pp.946-949
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• 2002

Particulate contamination is known to be a significant cause of failures of removable storage media. In this work, The effect of particles on the surface damage of removable hard disk media was investigated. The particles of different materials and size were introduced to the head-disk interface using a particle injection system. It was found that the particles of particulate size and property serious damaged the media. This study showed that cleaning pad is effective for reducing particle contamination, except for the particles of specific size and property. As a means to removed the particles of specific size, the concept of using a stepped taper at the leading edge of the slider is proposed.

• Proceedings of the Korean Society of Broadcast Engineers Conference
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• 2011.07a
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• pp.31-34
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• 2011

본 논문에서는 2D-3D 변환 후, 입체감 수정에 관련한 피드백 시스템과 그에 맞게 적용되는 적응적 관계식을 제안한다. 2D-3D 변환을 통해 우선 깊이 영상을 생성하고 이를 이용하여 깊이 영상 기반 렌더링(DIBR)을 통해 수평방향의 이동을 계산하여 좌영상과 우영상을 생성한다. 그러나 깊이 정보 기반 렌더링 후 사용자 선호에 따라 입체감을 수정할 필요가 있을 때 깊이 영상을 재생성 해야 하는 문제점이 발생하며 이를 극복하고자 피드백 시스템을 통한 두 개의 조절 파라메터를 소개 한다. 즉, 'Pull-in'혹은 'Push-away'의 입체감을 조절 할 수 있는 시차 이동식을 제안한다.

• Journal of Korea Multimedia Society
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• v.15 no.5
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• pp.677-691
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• 2012

Location Based Services using GPS receiver with network enabled smart phone provides various services and many business models. Currently, many context awareness models on smart phone applications are under developing. But most of the services are based on current user position and Point of Interest(POI)s, which are very static. In this paper, we proposed and implemented multimedia tourist guide system using smart phone, which are very dynamic and provides tour guide's voice and audio service on the spot. Also we provides tour experience sharing method which can easily share the videos and pictures for each users.

• Journal of Korea Multimedia Society
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• v.15 no.1
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• pp.108-114
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• 2012

Government-related organizations and institutions are stepping up their efforts to establish information system and service for disaster prevention because of the increasing occurrence of disaster. Therefore, they are collecting numerous disaster data using various way such as using mobile device or disaster history document. However, these method requires large amount of time and effort. Moreover, it is difficult to connects with another system because previous ways fall short of standard and connectivity. Therefore, this paper focused on collecting various disaster information using smartphone application and then complement the drawbacks of previous system.

• Proceedings of the Korean Society of Broadcast Engineers Conference
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• 2016.06a
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• pp.332-334
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• 2016

본 논문에서는 중계 차량 내 콘트롤러 사용빈도 분석을 위한 방법에 대해 논한다. 중계 차량 내 장비는 대부분 외산에 의존하고 고가의 장비를 사용하고 있다. 따라서 투자비용이 높고 국산화 기술에 대한 연구가 미미하다. 또한 사용하는 장비의 기능은 한정적인 것에 반해 불필요한 확장 기능이 너무 많이 탑재되어 있어 사용자의 활용 빈도가 낮고, 사용하기가 어렵다. 이에 본 논문에서는 인간공학적 콘트롤러 개발을 위해 이동식 중계 차량 내 콘트롤러 사용빈도를 영상 기반으로 자동 분석하기 위한 방법에 대해 제안한다. 사용빈도 분석을 위해 사용자의 손을 추적하고, 손으로 추정되는 좌표 값을 파악하여 계속 누적한다. 일정시간 동안 누적한 좌표값을 분석하여 콘트롤러 사용 빈도에 대해 파악하고자 한다. 이는 국내 중계방송 환경에 적합한 콘트롤러 장비를 개발하는 데 도움을 줄 수 있으며 국산 기술을 확보할 수 있는데 의의를 가진다.

• Journal of Korea Multimedia Society
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• v.13 no.10
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• pp.1487-1493
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• 2010

H.264 processes more detailed and more motion information for the compression efficiency. However, motion vector of H.264 takes more portion than previous standards such as MPEG-1/2/4 do, so that it is needed to consider motion vectors. This paper proposes the new algorithm with leaf mode in order to compress the motion vector efficiently. The proposed algorithm concentrates modes' distribution with leaf mode and carries out the compression of motion vector with less modes. The proposed algorithm adopted in current $4{\times}4$ motion vector matrix also can be extend to $8{\times}8$. The experiments shows that the proposed algorithm reduces up to 12.68% at header and 9.7% at resultant bitstream.

• Information and Communications Magazine
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• v.24 no.8
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• pp.40-52
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• 2007

본고에서는 비/저활용(57-66GHz) 대역에 대한 새로운 주파수 자원을 개척하여 HDTV급 신호를 케이블 및 위성방송 셋톱박스, 게임콘솔, DVD플레이어, 캠코더 및 이동식 멀티미디어 장비와 무선으로 연결시키는 전송 기술 개발을 위하여 Intel, Philips, Motorola, IBM, SiBeam, Panasonic, Sony등 세계적인 기업들이 국제 표준화(IEEE802.15, ETSI/BRAN, ECMA International) 공동 협력 및 기술 개발 경쟁을 벌이고 있는 상황이다. 본 표준기술은 국내 기업이 세계 시장을 장악하고 있는 LCD, PDP 및 차세대 DVD플레이어 등에 적용될 Wireless HD-SDI(High Definition Serial Data Interface)/ DVI(Digital Visual Interface)와, 외장 하드 디스크, 메모리 등 외부 기억 장치와의 자원 공유에 사용될 Muti-Gbps급 Wireless LAN, Wireless PAN, Wireless SAN(System Area Network) 등에 적용될 무선 전송 기술이다. 비/저활용 $59{\sim}66GHz$ 대역에 대한 국제 표준화로 IEEE802.15.3c를 중심으로 활발히 일어나고 있는 표준기술과 표준화 동향을 살펴본다.