• Proceedings of the Korean Information Science Society Conference
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• 2005.07b
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• pp.343-345
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• 2005

유비쿼터스 환경에서의 원격화상회의 시스템은 그 시스템을 이용하는 사용자에 따라서 시스템의 실행환경이나 사용자의 디바이스 환경 등 많은 변화 요소를 가지고 있다. 본 논문에서는, 사용자가 가질 수 있는 서로 다른 환경 등에 스스로 적응하여 효과적이고 최적화된 원격화상회의를 진행 할 수 있는 시스템 구조를 제안하며, 이를 이종의 플랫폼에서 구동할 수 있도록 각각의 플랫폼 환경에 최적화된 적응 구조를 동적으로 재구성할 수 있는 방법과 응용프로그램을 제안한다. 또한, 제안시스템의 프로토타입을 실제 구현하여 그 유효성을 확인하였다.

• Proceedings of the Korea Information Processing Society Conference
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• 2019.10a
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• pp.11-12
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• 2019

대규모 트래픽을 처리할 수 있는 원격 화상회의 시스템 아키텍처 설계로서 다량의 메시지 송수신을 감당 할 수 있으며 사용자에게는 원활한 응답성을 보장 할 수 있는 시스템을 설계한다.

• Proceedings of the Korea Information Processing Society Conference
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• 2001.04a
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• pp.107-110
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• 2001

화상회의시스템이란 영상 및 멀티미디어를 활용하여 원격 회의를 가능하게 하는 정보전달 매체로 가격이 저렴해지면서 학교 현장에 보급되기 시작하였다. 이 시스템의 활용 범위가 확장되어 교육청과 학교간의 회의뿐만 아니라 실시간 원격연수에도 활용이 가능하게 되었다. 그러나 현장의 교사들은 화상회의 시스템에 대한 지식과 응용 프로그램의 사용 경험 부족으로 적극적인 활용에 어려움을 겪고 있다. 본 연구에서는 현재 학교에 널리 보급되어 있는 MCU방식과 최근 새롭게 개발된 IP 멀티캐스팅 방식의 원격교육 시스템에 대한 장단점을 비교하고 분석하여 교육 현장에 적합한 화상회의시스템에 대한 평가를 할 것이다. 그리고, 실시간 원격교육 프로그램을 위한 화면의 설계 결과와 화상회의 시스템과의 인터페이스 방법에 대한 설계 결과를 제시할 것이다.

• Proceedings of the Korea Information Processing Society Conference
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• 2015.10a
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• pp.1607-1609
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• 2015

정보통신 기술의 발달과 스마트폰의 보급으로 일반 사용자들은 언제, 어디서나 가족 및 주변 사용자들의 모습을 바라보며 통화할 수 있게 되었고, 원하는 영상이나 사진을 감상할 수 있다. 하지만 시각장애인들은 이들을 위한 연구 및 사회적 인프라의 부족으로 인하여 이와 같은 서비스들의 제공 대상에서 늘 제외되어 왔다. 이러한 사항을 개선하기 위하여 본 연구는 시각장애인들을 위한 새로운 방식의 촉각 TV 시스템을 제안한다. 제안하는 시스템은 크게 3D 캡쳐(Capture) 기술, 실시간 전송/스트리밍 기술, 햅틱(Haptic) 장치 및 액츄에이터(Actuator)제어 기술로 구성된다.

• International journal of advanced smart convergence
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• v.9 no.4
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• pp.124-131
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• 2020

As users of internet-based software applications increase, functional and non-functional problems for software applications are quickly exposed to user reviews. These user reviews are an important source of information for software improvement. User review mining has become an important topic of intelligent software engineering. This study proposes a user review mining method for software improvement. User review data collected by crawling on the app review page is analyzed to check user satisfaction. It analyzes the sentiment of positive and negative that users feel with a machine learning method. And it analyzes user requirement issues through topic analysis based on structural topic modeling. The user review mining process proposed in this study conducted a case study with the a non-face-to-face video conferencing app. Software improvement through user review mining contributes to the user lock-in effect and extending the life cycle of the software. The results of this study will contribute to providing insight on improvement not only for developers, but also for service operators and marketing.

• Journal of Korea Society of Digital Industry and Information Management
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• v.16 no.4
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• pp.67-74
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• 2020

As the information age develops, Online education and Non-face-to-face work are becoming common. Telecommuting such as tele-education and video conferencing through the application of information technology is also becoming common due to the COVID-19. Unexpected information leakage can occur online when the company conducts work remotely or holds meetings. A system to authenticate users is needed to reduce information leakage. In this study, there are various ways to authenticate remote access users. By applying burn authentication using a biometric system, a method to identify users is proposed. The method used in the study was studied the main component analysis method, which recognizes several characteristics in facial recognition and processes interrelationships. It proposed a method that can be easily utilized without additional devices by utilizing a camera connected to a computer by authenticating the user using the shape and characteristics of the face by using the PCA method.

• Proceedings of the Korea Information Processing Society Conference
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• 2022.11a
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• pp.761-763
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• 2022

코로나19 이후 화상회의 빈도가 높아지면서 줌 피로라는 신조어가 등장할 만큼 상대방을 가까이 마주하며 회의를 진행하는 것이 사람들의 피로도를 상승시키고 있다. 본 논문에서는 얼굴 합성과 이미지 애니메이션을 이용한 아바타를 통해 사용자가 화상회의에 참가할 수 있는 시스템을 제안한다. 사용자와 닮은 개성 있는 캐릭터는 실시간으로 사용자의 표정 및 움직임을 반영하여 화상회의에 적용될 수 있고 채팅과 커뮤니티에서 캐릭터의 이모티콘으로 감정을 표현할 수 있다.

• Journal of the Institute of Electronics and Information Engineers
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• v.49 no.12
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• pp.81-88
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• 2012

As the performance of the next-generation broadband wireless networks is dramatically enhanced, various services (i.e., education, Live video streaming, Live video conferencing, online games, etc.) have been provided to users through a smart mobile platform. Those services are usually provided by using the centralized communication server. However, since all multimedia traffic is exchanged through a communication server, it often has the scalability problem with regard to traffic management. Our main purpose is for group smart users to provide scalable live multimedia streaming service based on P2P network. To do this, we have designed an architecture of P2P-based service management for mobile group communication management and service management protocol. In order to verify the performance of the proposed scheme, we have mathematically analyzed the performance in terms of the average transmission delay and bandwid th utilization.

• The Journal of Korean Institute of Communications and Information Sciences
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• v.31 no.5B
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• pp.430-441
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• 2006

As the various A/V devices and home networks are delivered to users, home networks are changing to an entertainment network. It is expected that the required network bandwidth and the amount of usage of media content in home entertainment networks will be increased. Although the access networks and home networks becoming a high speed network, there remains the problems for QoS-guaranteed media content transfer in home networks. Also, in the home network, there can be network traffic caused by applications like video conferencing, video telephone, and VoIP(voice over IP) as well as inner network traffic of home network. Since media content transfer requires the real-time delivery, it is very important and basic requirement that is to transfer media content to A/V device user wants while keeping the media quality. Even though there are many middleware protocol for home networking, they provide basic device discovery and control or simple functions for QoS-guaranteed media content transfer that are not enough to provide QoS-guaranteed media transfer service that user wants. Thus, in this paper, we propose the technique based on UPnP(universal plug and play) protocol for QoS-guaranteed media content transfer in the home network. The proposed technique is compatible with UPnP and can be used with UPnP as additional functions. In this paper, we utilize VideoLAN application to verify the proposed technique. We add the additional modules that support the proposed technique's function to VideoLAN and we verify the its functions through various test scenarios.

• The Journal of Korean Institute of Communications and Information Sciences
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• v.33 no.11B
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• pp.968-980
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• 2008

Providing handover with guaranteed QoS for real-time multimedia service such as VoIP, video/audio streaming, and video conferencing in wireless LAN is a challenging task. In this paper, we present efficient layer 2 handover mechanism in wireless LAN, which can provide fast handover with guaranteed QoS for real-time multimedia service. To this end, the scanning period and the number of channels per scanning for handover are dynamically adapted to the type of applications and wireless networking environment, so that both the degradation of application service quality and signaling overhead are minimized simultaneously. The performance of the proposed mechanism is verified by the simulation. The simulation results show that the proposed mechanism guarantess QoS of each multimedia application with minimal power consumption.