• Journal of Digital Contents Society
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• v.4 no.1
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• pp.91-99
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• 2003

With the improvement of the web-technology, web-based cyber education is progressing from the text-based to the hyper-based including multimedia, and from one way of simply giving the contents to the learner to another way of providing mutual interaction between instructors and learners. There are several fields using the dynamic application and multimedia contents. RIA(Rich Internet Application), which. is the new paradigm of the web, provides clients with more effective and rich contents, combining the dynamic application and multimedia contents. With the existing web script language, a lot of time and efforts will be very needed to provide learners with various and rich contents. In this paper, we compare the efforts in developing the RIA based education system with the Non-RIA based education system, then experiment the characteristics of the RIA based education system

• Journal of Biomedical Engineering Research
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• v.17 no.1
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• pp.33-42
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• 1996

A multimedia remote ultrasound image transfer system for tole-medical services was implemented. The image data of the ultrasound scanner system of the slave is compressed using image compression system. It is transferred to the master PC via ISDN UNI(User-Network Interface) and decompressd by image decompression system. The total system is composed of three parts; first, the image capture card which transfers bidirection- al data between ultrasound scanner system and PC, second, image compression and decompression card, finally, ISDN TA(Terminal Adaptor) card for transferring the image. This system has a easy user interface because it is executed on the basis of MS-WINDOWS. So it is capable of serving medical services at a remote place.

• 한국HCI학회:학술대회논문집
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• 2006.02b
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• pp.69-75
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• 2006

디지털 테크놀로지의 비약적인 발전으로 우리는 연령과 계층을 막론하고 실생활 측면에서 사용자 환경의 변화, 디자인 시각의 변화 등 많은 변화의 사례들을 인지할 수 있다. 그 중에서도 최근 유아들의 전유물이었던 완구 시장이 학생, 성인들 대상으로 마케팅이 확장되면서 기존에 없었던 보다 지능적인 시스템과 다양한 콘텐츠를 보유하고 혁신적인 인터페이스를 갖춘 디지털 인텔리전트 브릭(Digital Intelligent Brick)완구가 시장을 빠르게 확대해 나가고 있다. 이처럼 아날로그 브릭에서 디지털 브릭으로의 새로운 변화를 주도한 대표적인 예로는 MIT와 공동연구로 개발된 로보틱스 인벤션 시스템(Robotics Invention System)인 레고(Lego)의 '마인드스톰'을 들 수 있다. 인텔리전트 브릭 시스템 완구는 Stud와 Tube의 Elements로 이루어진 기본적이고 반복적인 재료의 속성에서 시스템의 무한한 가변성과 사용자의 다양한 조건에 맞춘 인터페이스를 적용함으로써 창의적 결과물로의 확장성을 나타내고 있다. 본 연구에서는 디지털 테크놀로지를 기반으로 한 사용자중심 콘텐츠 속성을 지닌 인텔리전트 브릭 시스템에서의 시스템 구조 가변성 및 인터페이스 디자인의 확장성, 그리고 사용자 인터랙션 측면에 관하여 분석해 보고자 한다. 이를 토대로 인텔리전트 브릭 시스템이 향후 디지털 디자인 산업의 다양한 측면에서 보다 적극적으로 활용될 수 있는 기초를 제시하는 데 본 연구의 목적이 있다고 할 것이다.

• Journal of the Korean Institute of Educational Facilities
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• v.3 no.1
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• pp.19-30
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• 1996

Integrated Services Digital Networks (ISDNs) and Broadband ISDN provide high speed data transmission capabilities and therefore, it is now possible to communicate with multimedia information including graphic, motion image, data and audio. Among several new services utilizing multimedia communication networks, distance education service which aims to overcome time and space restrictions between teachers and learners is now heavily focused in many countries. In this paper, several factors which affect to the effectiveness of distance education are surveyed and facilities for organizing distance education classrooms which utilize high speed multimedia communication network are studied in detail. Also, some points are suggested for organizing successful distance equation system based on the multimedia communication technology.

• The Journal of the Acoustical Society of Korea
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• v.24 no.4
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• pp.186-193
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• 2005

The Terrestrial Digital Multimedia Broadcasting (T-DMB) system supplies high quality audio comparable with VCD in 7 inch display and high quality audio comparable CD at the mobile reception environment T-DMB will launch commercial service at the middle of 2005. However the bandwidth for audio data and the number of channels are restricted to 128 kbps and 2 respectively in the current T-DMB standard because of the limitation of available bandwidth for multimedia data. This Paper Proposes a novel media processor structure for providing multi-channel audio contents oyer T-DMB system allowing backward compatibility with the legacy T-DMB receiver. Furthermore. we also Propose an adaptive receiver structure to supply optimal audio contents on various speaker configuration in T-DMB receiver. To provide multi-channel audio contents allowing backward comaptilbity with the legacy T-DMB receiver, the additional data for multi-channel audio are defined as a dependent stream of main audio stream. The OD strucure for control an additional multi-channel audio elementary stream is proposed without changing the BIFS of the legacy T-DMB system.

• Journal of Korea Multimedia Society
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• v.6 no.4
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• pp.650-657
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• 2003

We describe a scheme for developing character-based interface within the context of an agent-based tutoring system in the Web environment. The ideas in this paper stem from original work representing aspects of human emotion in tutoring computer models, where may provide mote natural ways for students to communicate with digital learning materials. The proposed system model is a set of software services that enable developers to incorporate interactive animated characters into their Web pages designed for on-line lectures. The prototypical application is developed and shown for validating the applicability and the effectiveness of this model in real tutoring settings.

• Journal of Korea Multimedia Society
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• v.9 no.12
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• pp.1617-1627
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• 2006

The concept of middleware for digital TV receivers is not new one. Using middleware for digital TV development has a number of advantages. It makes it easier for manufacturers to hide differences in the underlying hardware. It also offers a standard platform for application developers. Digital TV middleware enables set-top boxes(STBs) to run video, audio, and applications. The main concern of digital TV middleware is now to reduce its memory usage because most STBs in the market are small footprint. In this paper, we propose several ideas about how to reduce the required memory size on the runtime area of DTV middleware using a new native process technology. Our proposed system has two components; the Efficient Native Process Module, and Enhanced Native Interface APIs for concurrent native modules. With our approach, the required memory reduced from 50% up to 75% compared with the traditional approach. It can be suitable for low end STBs of very low hardware limitation.

• Journal of Korea Multimedia Society
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• v.21 no.1
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• pp.51-60
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• 2018

We present a real-time interactive particle-art with human motion based on computer vision techniques. We used computer vision techniques to reduce the number of equipments that required for media art appreciations. We analyze pros and cons of various computer vision methods that can adapted to interactive digital media art. In our system, background subtraction is applied to search an audience. The audience image is changed into particles with grid cells. Optical flow is used to detect the motion of the audience and create particle effects. Also we define a virtual button for interaction. This paper introduces a series of computer vision modules to build the interactive digital media art contents which can be easily configurated with a camera sensor.

• Journal of the Korea Institute of Information and Communication Engineering
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• v.8 no.7
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• pp.1488-1492
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• 2004

The digital signal has been replaced the analog signal in most of every field of multimedia including still image, animation, and audio due to the enormous extension of computer supply and the fast development of computer network. The consumers of information are able to enjoy the abundance of information because of one of the digital signal traits that very easy to regenerate the original data. Because of the trait, however, it is very hard for the producers of information to keep the copyright with the merit of original copy in quality excellency. In this paper, the watermarking technology which inserts a RGB color watermark in color image using the visual characteristics of wavelet coefficient was proposed. As a result, the PSNR value of image was varied depending on perceptual parameter, but we can obtain 32dB as a whole.

• Journal of Korea Multimedia Society
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• v.25 no.8
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• pp.1007-1021
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• 2022

Autonomous driving of unmanned aerial vehicles may have to pay expensive cost to create and switch new routes if unexpected obstacles exist or local map updates occured by the control system due to incorrect route information. Integrating digital twins into the path-following process requires more computing resources to quickly switch the wrong path to an alternative path, but it can quickly update the path during flight. In this study, we design a DEVS-based simulation environment which can modify optimized paths through short-term simulation of multi-virtual UAVs for applying digital twin concepts to path follow. Through simulation, we confirmed the possibility of increasing the mission stability of UAV.