• Journal of KIISE:Computing Practices and Letters
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• v.9 no.6
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• pp.602-609
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• 2003

Emerging high-speed next-generation Internet is enabling immersive media communication systems and applications to realize geographically distributed team collaborations while overcoming the limit of distance and time. Focusing on the reliable real-time delivery of 3D (i.e., stereo) video among corresponding parties, in this paper, key schemes for stereo video processing/display and reliable transport of stereo video packets over high-speed Internet are designed and implemented. The performance of proposed stereo video delivery system is evaluated both by emulating various network situations for quantitative comparison and by transmitting over real-world Internet up to the speed of around 100 Mbps. The results demonstrate the feasibility of the proposed system in supporting the desired immersive communication.

• Journal of the Institute of Electronics Engineers of Korea SP
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• v.41 no.6
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• pp.231-237
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• 2004

Current paper introduces the multimedia functional module and related interface development for digital TV. The module is developed for displaying the image captured by digital still camera, camcorder, or PC in the digital TV. For these purposes, the module has the interface circuit for accessing five media type of memory cards. It decodes JPEG, BMP, or TIFF image date saved in the memory card and converts the image data to analog RGB signal. It also supports three types of output image size from HD(High Definition) to WXGA(Wide Extended Graphics Array) resolution. So the introduced module could be adopted in all kinds of digital TV set.

• Journal of KIISE:Computing Practices and Letters
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• v.7 no.4
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• pp.309-316
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• 2001

MPEG-4 describes audiovisual scenes that are composed of several media objects, organized in a hierarchical fashion. And for end users, it brings higher levels of interaction with content, within the limits set by the author. These spatio-temporal arrangements of the objects in the scene are specified using a parametric methodology, BIFS(BInary Format for Scenes). This paper proposes MPEG-4 Contents Authoring System that provides visual configuration of an MPEG-4 scene and its event information. The developed MPEG-4 Contents Authoring System generates streaming MPEG-4 Contents, such as BIFS stream, OD(Object Descriptor) stream automatically.

• 전자공학회논문지 IE
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• v.45 no.1
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• pp.50-57
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• 2008

It is applying the various teaming contents to improve learner's studying desire and effect in E-Learning system. In this learning contents, there are text animation, sound and picture etc. But, multimedia teaming contents which has big file size need much transmission service times. In this paper, I proposed a scheduling technique of LMS to be faster and service efficiently the multimedia learning contents which was managed and processed it in LMS. for this purpose, I used message and scheduler at LMS. While loaming was processed, it saved the result information of learning contents request to LMS. In this case, if the learner request loaming contents request, it could be possible to support the learning contents efficiently to use learning contents information in LMS without connecting to LCMS. As application result of this techniques, at the first learning course, existent techniques displayed faster learning contents service than proposal techniques. But the more learning process, proposal technique is faster service than existent.

• Journal of KIISE:Information Networking
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• v.30 no.4
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• pp.494-503
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• 2003

The IEEE 1394 High Speed Serial Bus is a versatile, high-performance, and low-cost method of promoting interoperability between all types of A/V and computing devices. IEEE 1394 provides two transfer modes: asynchronous mode for best effort service and isochronous mode for best effort service with bandwidth reservation. This paper shows the bus performance and compared the transfer odes first at the link level and then at the application level. For the application level performance, we analyze the bus systems with fixed and adaptive interfaces, applied between the upper layer and the 1394 layer, using polling systems. Also we verifies the analysis models with simulation studies. Based on our analysis, we conclude that the adaptive interface reduces the bus access time and so increases the bus utilization.

• Journal of Korea Multimedia Society
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• v.12 no.3
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• pp.397-408
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• 2009

Image training is a very important yet difficult state for automated visual inspection using computers. Because the size of parts for the recently produced PCB (Printed Circuit Board) becomes smaller and circuit patterns gradually become more complex, a difficult and complex training process is becoming a big problem within an industry where development cycle for new products is short and various products must be inspected. This research produced a reference image by using CAD (Gerber) file which becomes a standard for PCB automatic visual inspection. Reference image from a Gerber file guarantees PCB patterns with no defects. Through system implementation and experimentation, Gerber file is used in order to propose a plan which allows an easy training process for PCB automatic visual inspection system.

• Proceedings of the Korean Society of Broadcast Engineers Conference
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• 2022.11a
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• pp.228-231
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• 2022

'코로나19'의 여파로 인해 많은 분야에서 비대면 회의 및 상거래가 활성화되면서 기존 홈쇼핑에서의 방송 시스템 방식이 아닌 간단하게 구성할 수 있는 라이브 커머스의 중요성이 대두되었다. 시스템적으로 간편함을 갖춘 동시에 누구나 쉽게 접근을 할 수 있는 시스템을 구성하여 제안하고자 한다.

• The KIPS Transactions:PartD
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• v.9D no.3
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• pp.501-510
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• 2002

A various multimedia application services should be developed with techniques of high speed networks and computer. Among these, video-conference system over Internet is useful and important, and the standardization for it should be showed in ITU-T H.323. H.323 standardization consists of four components such as Terminal, MCU(Multipoint Control Unit), Gatekeeper, and Gateway. Among these, the functions of Gatekeeper are as follows, firstly the address translation service to translate the alias address into the IP address, secondary conference admission control service to control of conference start and termination, thirdly bandwidth management service for H.323 terminals. In this paper, we implemented the Gatekeeper for an efficient management of video-conference components in Internet environment, and will introduce our system. As the experimental results with CUSeeMe and Netmeeting which are well-known H.323 terminal, it is known that our gatekeeper should be satisfied with H.323 standardization.

• Proceedings of the Korean Society for Emotion and Sensibility Conference
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• 1998.04a
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• pp.298-303
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• 1998

공동연구에 대한 필요성이 증대됨에 따라 이의 문제점으로 지적되는 시공간의 제약을 극복하기 위한 원격 공동연구 시스템 개발의 필요성은 더욱 증대되고 있다. 이 논문은 다자간 통신, 실시간 처리, 미디어 동기화 등의 기능들의 제공을 목표로 하는 MAESTRO라 불리는 객체 지향 분산 멀티미디어 시스템 플랫폼인 원격 화상회의, 전자공책, 화이트 보드, 채팅 도구, 응용 공유, 세션 관리도구 등 원격 공동연구 플랫폼의 설계와 구현을 설명한다.

• Proceedings of the Korea Information Processing Society Conference
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• 2013.11a
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• pp.535-537
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• 2013

최근 현대사회의 가족체제 변화로 인해 유아 보육의 수요와 보육 시설이 급증함으로써 양질의 보육 환경에 대한 요구가 점차 증가하고 있다. 유아기는 성인과 비교할 때 정서가 불안정하고 급변하는 시기이며 특히 시각 및 청각을 통한 자극에 더욱 민감하므로 유아 시기의 보육 환경은 성장 이후 지적 사회적 발달에 큰 영향을 미치는 중요한 요소이다. 또한 유아의 보육 활동 유형에 따라 이러한 두 가지 이상의 감각을 동시에 자극하게 되면 감각의 통합과 상호작용으로 편안함과 집중력을 향상하는 효과를 가져온다. 본 논문에서는 만 3~5 세의 유아를 대상으로 양질의 보육 환경 제공을 위해 '수면', '학습', '놀이', '식사 및 휴식'을 포함한 네 가지 보육 활동 유형을 상황 정보로 정의하고 각 상황에 적합한 시각 및 청각 환경을 복합적으로 서비스하기 위한 다감각 시스템을 제안한다.