• 한국멀티미디어학회논문지
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• 제24권11호
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• pp.1526-1537
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• 2021

Due to the difference between the underwater communication environment and the terrestrial communication environment, the radio communication mainly used on the ground cannot be used in underwater. For this reason, in the underwater communication environment, various communication media such as acoustic waves, infrared rays, light and so on has been studied, but there exist several difficulties in operating them individually due to their physical limitations. The concept for overcoming these difficulties is the very underwater multi-media communication, a method to select a communication medium best suitable for the current underwater environment among underwater communication multimedia whenever there occurs underwater communication failure. In this paper, we present an underwater multi-media communication network based on star topology and a fragmentation and reassembly technique to solve the problems caused by the different MTU (Maximum Transmission Unit) sizes among different underwater communication media. We also present the estimations and analysis on processing times in each of fragmentation and reassembly and the total data amount for transmitting fragments in our proposed underwater multi-media communication network.

• 한국정보전자통신기술학회논문지
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• 제9권1호
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• pp.109-113
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• 2016

사물 통신과 멀티미디어 협동 작업 환경의 필요성을 기술하고, 그 기반 하에 사물 통신 기반 화이트보드에서의 오류 처리에 대해서 제안하였다. 본 정보의 수집 및 활용 관계가 사람 대 사람에서 사람 대 사물의 관계, 사물 대 사물의 관계로 변화되어 사물 간 상호 정보 교환 및 제어 시스템을 통해 사물이 자율적으로 관리하는 형태로 진화되고 있다. 본 논문은 사물형 지능 통신 기반의 멀티미디어 공동 작업 환경을 위한 화이트보드와 오류 제어에 대해서 기술한다.

• 수산해양교육연구
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• 제16권2호
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• pp.163-170
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• 2004

The rapid exchanges of mobile computing environment and development of wireless communication are providing many effects for learning activity of students. Recently, PDA system developers which are studying memory capacity, communication speed and size of screen support techniques to be capable of learning from students in the wireless or moving environment. In this viewpoints, this paper has a purpose to design multimedia learning system to be able to do with sound lecture contents. The implemented system largely consists of two parts which have the teacher module and students module. The one manages learning progress of students, class management, bulletin board and etc. The other is capable of using studying and bulletin functions. The main idea of this research is focus to upgrade the effect of learning without almost treating the existing studies, which can be listening sound lecture and also seeing text and image at the same time.

• 한국컴퓨터정보학회논문지
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• 제4권1호
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• pp.15-20
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• 1999

본 논문에서는 CBM(Computer Based Multimedia) 기반의 원격교육을 위해 요구되는 몇 가지 필요사항을 제시한다. CBM 기반의 원격교육은 초고속 통신망을 이용한 가상 공간상에서 실시간 상호작용 응용인 원격 가정학습 시스템을 멀티미디어 기술과 접목한 멀티미디어 원격교육의 한 형태이다. 본 논문에서 제시되는 요구사항들은 멀티미디어 통신을 위한 국제 표준인 ITU (International Telecommunication Union)의 표준화 규격을 따르고 있으며, 제시하는 통합 홈 정보서비스의 구조는 IEEE 1394시리얼 통신과 POF(Plastic Optical Fiber) 가정용 백본을 기반으로 하고 있다.

• 한국멀티미디어학회논문지
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• 제19권5호
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• pp.901-909
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• 2016

Unprecedented attention is being given to Smart Grid, Micro Grid and Internet of Things (IoT) in the Republic of Korea recently but such systems' effect is not well experienced by the market since they require additional and costly reforms for the existing household electrical system where adaptive communication platforms are needed. As such platforms, both wireless and wire communication technologies are being considered at the moment. Usually, they include WiFi, Zigbee technologies and the latter, LAN technology. However, communication speed decline due to signal attenuation and interference during wireless communications are considered to be the major problem and the extra works involving time and costs for the LAN system construction can be another demerit. Therefore, in this paper, we have introduced a Power Line Communication-based Smart Outlet System Expandable at Home to complement these disadvantages. Proposed IoT system involves Power Line Communication (PLC) technology which is essential to constructing a Smart Grid.

• KSII Transactions on Internet and Information Systems (TIIS)
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• 제13권3호
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• pp.1213-1237
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• 2019

Vehicular Ad-hoc Network (VANET) facilities envision future Intelligent Transporting Systems (ITSs) by providing inter-vehicle communication for metrics such as road surveillance, traffic information, and road condition. In recent years, vehicle manufacturers, researchers and academicians have devoted significant attention to vehicular communication technology because of its highly dynamic connectivity and self-organized, decentralized networking characteristics. However, due to VANET's high mobility, dynamic network topology and low communication coverage, dissemination of large data packets (e.g. multimedia content) is challenging. Clustering enhances network performance by maintaining communication link stability, sharing network resources and efficiently using bandwidth among nodes. This paper proposes a mobility-based, multi-hop clustering algorithm, (MBCA) for multimedia content broadcasting over an IEEE 802.11p-LTE-enabled hybrid VANET architecture. The OMNeT++ network simulator and a SUMO traffic generator are used to simulate a network scenario. The simulation results indicate that the proposed clustering algorithm over a hybrid VANET architecture improves the overall network stability and performance, resulting in an overall 20% increased cluster head duration, 20% increased cluster member duration, lower cluster overhead, 15% improved data packet delivery ratio and lower network delay from the referenced schemes [46], [47] and [50] during multimedia content dissemination over VANET.

• 한국정보처리학회:학술대회논문집
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• 한국정보처리학회 2017년도 춘계학술발표대회
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• pp.1079-1080
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• 2017

Today multimedia technologies are playing an increasingly important role in games, movies, and live performances. In this paper, we design a flexible interactive system integrated with gesture recognition, skeleton tracking, internet communication, and content edition using multi-sensors to direct and control the performance on stage. In this system, the performer can control the elements showed on stage through corresponding gestures and body movements during the performance. The system provides an easier way for users to change the content of the performance if they intent to do.

• 한국멀티미디어학회논문지
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• 제11권6호
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• pp.883-890
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• 2008

It becomes enabled to provide variety of multimedia contents through mobile service with the development of high-speed 3rd generation mobile communication and handsets. MMS (Multimedia Messaging Service) can be displayed in the presentation format which is unified the various multimedia contents such as text, audio, image, video, etc. It is applicable as a new type of ubiquitous learning. In this study we propose to design a mobile learning system by providing profiles which meets the standard of CC/PP and by generating multimedia messages based on SMIL language through the adaptation steps according to the learning environment, the content type, and the device property of learners.

• 한국방송∙미디어공학회:학술대회논문집
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• 한국방송공학회 1997년도 Proceedings International Workshop on New Video Media Technology
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• pp.55-60
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• 1997

Innovation on digital compression technology, high speed networking technology, digital broadcasting technology and distributed processing technology provides new interactive multimedia service that integrates telecommunication, broadcasting, and computer application. To meet the new trends, we focus our research direction to integrate the telecommunication services and the broadcasting services. For this purpose, we designed and implemented an interactive multimedia service platform based on the DAVIC specification. Our research results in the development of integrated interactive services and its experience will be feedback to the field trial service that will be launched from next year. In this paper, we will describe the overall architecture and system implementation results of the interactive multimedia service platform.

• 한국전자통신학회논문지
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• 제8권1호
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• pp.199-206
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• 2013

최근 차량 내 인포테인먼트 시스템에 대한 다양한 요구가 급격하게 증가함에 따라 보다 편리하고 인간 친화적이고 첨단 기능들을 갖춘 차량용 인포테인먼트 시스템들이 속속 등장하고 있다. 본 논문에서는 차량 내 다양한 멀티미디어 응용에 적용할 수 있는 임베디드 기반 차량용 멀티미디어 인포테인먼트 시스템을 구현하였다. 구현된 시스템은 하나의 프로세서에서 두 개 채널 이상의 멀티미디어 소스들을 각각 독립적으로 디스플레이 할 수 있도록 하여 비용을 절감할 수 있다. 또한 저장장치에 저장된 비디오, 오디오, 영상 등의 콘텐츠뿐만아니라 CAM, T-DMB, DVB-T 등 실시간으로 제공되는 콘텐츠들도 멀티로 디스플레이 될 수 있다. Wi-Fi를 이용한 스마트폰과의 연결성을 지원하여 스마트폰에 저장되어 있는 멀티미디어 콘텐츠 또한 멀티로 디스플레이 할 수 있다. 본 논문에서 구현된 시스템은 AVN(Audio Video Navigation), RSE(Rear Seat Entertainment) 등의 차량용 인포테인먼트 시스템에 저비용으로 다양하게 응용될 수 있을 것으로 기대된다.