• Journal of the Korean Institute of Intelligent Systems
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• v.15 no.5
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• pp.605-614
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• 2005

In this paper, we present the design and implementation of an agent knowledge and QoS tuning methodology to improve the flexibility of agent-based flexible video-conference system. In order to improve the flexibility during video-conferencing, we propose a new T-INTER(Tuning-INTER) architecture of knowledge part in video-conference manager (VCM) agent in which an automatic QoS parameter tuning method is imbedded. The flexible video-conference system structured based on the proposed architecture can cope with the changes in service quality required by users. The VCM agent cooperates with other agents by protocols and executes the automatic QoS parameter tuning task whenever needed. By the tuned parameters, the system is able to flexibly cope with the internal or external changes and the burden of users can be decreased. In the experimental section, it is shown that our proposed system outperforms the existing system.

• Proceedings of the KSR Conference
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• 2011.10a
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• pp.3306-3311
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• 2011

Last Subway video surveillance system consists of a network device that is used. Through the network to transmit video data to digital conversion of analog video via a process server or a PC video to a split-screen in various forms is expressed. In recent years, multi-monitor video cameras from the same pop-up or more, such as history, structure expressed on a variety of video is required by express. The problem with these systems, video compression and transmission of many cameras, and this image data received from the server or PC to take out all the images you want to watch to occur when in order to express all of the images because of the need to decode most of the program per limit of number of channels is positioned. This limited number of channels to have a video that nothing forced, but it is likely to do so in the future performance of the hardware evolves gradually channeled images available number of channels will increase proportionately. However, as the development of hardware required for a single screen video channel will be more gradual capital. The hardware rather than relying solely on the performance of the decoded video data on the screen in order to express a more efficient utilization of shared memory for video surveillance software will provide the operating plan.

• Proceedings of the Korean Society of Broadcast Engineers Conference
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• 1998.06b
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• pp.85-91
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• 1998

Many of the newest network suers are gaining their fist network experience as users of the Internet. Because of the universal nature of this exciting new experience, millions of new users are driving the demand for increasingly multimedia oriented applications, especially in communication area. Since the communication via the Internet can use various media forms including audio, video and graphics, it can e very efficient communication system on the Internet, which allows Internet users to communicate, collaborate, and associate with others. Webber provides various communication services, like ACS(Audio Conference System), VCS(Video Conference System) and Virtual Space, in an integrated environment. Webber consists of Service-PUBs(Processing Unit Plug-in), which process each service, and Framework, which manages these PUPs. PUP is so highly independent of each other that it's easy to add, maintain, delete services and also optimally configure the system to user's terminal performance or network status.

• Proceedings of the Korea Multimedia Society Conference
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• 2000.04a
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• pp.250-253
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• 2000

컴퓨터신기술들을 이용한 가상대학이나 원격교육 시스템이 최근에 기존의 교육 환경이 안고 있는 문제점들을 해결 할 수 있는 유력한 대안으로써 대두되고 있는 실정이다. 이 논문은 원격교육 시스템 기반을 구축하기 위한 일련의 연구의 한 부분으로써, 우선 ' 같은 시간대 다른 장소' 형태의 원격교육강좌를 개설하기 위하여 Video Congferencing System을 이용한 강좌구조를 제시한다. 아울러 이 형태의 원격교육과정에 사용될 수 잇는 곤텐츠 개발을 위하여 멀티미디어 기술을 바탕으로 한 강의 포맷을 제시하고자한다.

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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• 2003.05a
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• pp.175-178
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• 2003

In this paper, proposed system use real-time MPEG-2 compression, and retrieve video from the storage using efficient indexed algorithm. System survey wide military range, diffuse situation to adjacent units, and transmit images long distance.

• Proceedings of the Korea Multimedia Society Conference
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• 2001.06a
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• pp.330-337
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• 2001

디지털 영상제작 환경의 변화가 제일 먼저 뿌리를 내린 곳은 바로 1인 제작방식(One Man Producing System)을 취하고 있는 VJ(Video Journalist) 분야다. 6mm 소형 디지털 카메라와 디지털 편집기술의 등장 이후 VJ를 중심으로 급속도로 확산되고 있는 1인 제작시스템은 영상물 제작의 새로운 패러다임을 형성하고 있으며, 특히 VJ시스템의 고효율성은 기존의 방송영상물 시장에 기여할 수 있는 높은 잠재력과 가능성을 내포하고 있다. 그러나 현재 VJ시스템은 단지 값싼 영상제작 시스템정도로 왜곡되어 관습화 되어가고 있는 실정이다. 이런 맥락에서 본 논문은 VJ시스템의 특성을 중심으로 그 경쟁력 강화를 위한 지향점을 논한다.

• Proceedings of the Korean Society of Broadcast Engineers Conference
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• 1998.06b
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• pp.45-50
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• 1998

Several 3 dimensional image display systems were recently developed in Korea. These are a holographic video system based on pulse laser illumination, ad 8-view 3 dimensional image system capable of displaying computer generated 3 dimensional images and multiview 3 dimensional imaging system based on moving aperture and holographic screens of both transmission and reflection types. All these systems require no special glasses to watch and works impressively.

• Proceedings of the KIEE Conference
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• 2004.11c
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• pp.203-205
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• 2004

We propose a video chatting algorithm using MPEG-4 over Mobile IPv6. This real-time system transmits video and character data based on UDP. To send data efficiently within limited bandwidth, we use a standard multimedia compression algorithm, MPEG-4, that encodes video data and mobile IPv6 guarantees effective mobility. This system presents the example of the mobile multimedia applications that will be the solution for the next internet services.

• Proceedings of the Korea Contents Association Conference
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• 2003.05a
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• pp.218-222
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• 2003

Internet has made it easer to get information, also distribute and exchange it among people. It brings about issues regarding intelligent property and copyright threats. h a multimedia commerce such as video-on-demand, Internet broadcasting services, only users who have rights for use of these services should be able to access and watch those video or movies In this paper, we propose DRM(Digital Right Management) system for P4 -based streaming and MP4 encryption algorithm for proposed DRM system.

• Proceedings of the IEEK Conference
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• 2003.11a
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• pp.267-270
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• 2003

The DMB recently standardized in Korea is a Eureka-147 DAB(Digital Audio Broadcasting)-based standard which is able to provide multimedia services including moving pictures, still images, text and etc. That has the structure to add the MPEG media codec and the MPEG system, namely, video-multiplexer to the DAB system. In this paper, we analysis the video-multiplexer of the DMB standard and propose a new multiplexer, namely. M4GM(MPEG-4 General Mux) included in the DMB vido-multiplexer for the performance improvement with respect to the transmission efficiency and the expansible functions. In addition, we simulate the two video-multiplexers and then compare and estimate their performance entirely.