• 한국산학기술학회논문지
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• 제4권2호
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• pp.71-75
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• 2003

멀티미디어 콘텐츠의 내용이 다양해지고 유통 구조가 복잡해짐으로 인하여 발생학 수 있는 문제들을 해결하기 위한 방안으로 멀티미디어 콘텐츠 유통 모델을 제안하였다. 무선 환경에서의 온라인 유통 과정은 기존의 오프라인이나 유선 네트워크와는 다근 요소들이 많이 포함되어 있다. 더구나 디지털 저작물인 멀티미디어 콘텐츠는 쉽고 빠르게 불법 복제되고 전파될 수 있다. 이러한 환경 하에서 멀티미디어 콘텐츠의 저작권과 관련된 당사자들의 권리와 이익을 보호할 수 있는 체계가 필요하다. 본 논문에서는 멀티미디어 유통 프레임워크인 MPEG-21에 기반하여 무선 환경에서의 콘텐츠 유통 프레임워크를 제안하였다. 이 모델은 디지털 저작권 관리 시스템에 적용되어 온라인 유통에 있어서 거래 당사자들 사이의 상호 권리 침해 방지를 위한 방법으로 활용될 수 있다.

• 한국통신학회논문지
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• 제30권6B호
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• pp.355-368
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• 2005

가정 내 디지털 정보 가전들 간에 데이터를 주고받을 수 있는 통로를 제공하고 동시에 외부 인터넷 망과의 접속을 통해 방송 콘텐츠를 서비스하는 방송통신 융합형 홈 네트워크에 관한 연구가 활발히 진행되고 있다. 본 논문에서는 방송통신 융합을 지원하는 홈 네트워크에서 다수의 이기종 단말로 멀티미디어 서비스를 효과적으로 분배할 수 있는 홈 게이트웨이의 구조를 제시한다. 제안한 홈 게이트웨이는 다양한 프로토콜을 지원하여 상호 통신 가능하게 하는 게이트웨이 기능과, 콘텐츠를 중개하는 미디어 서버기능, 그리고 콘텐츠를 변환해주는 미디어 변환기로서의 역할을 수행 한다. 홈 네트워크 내의 다양한 멀티미디어 전송 시나리오에서 제안한 홈 게이트웨이의 역할을 살펴보고 실효성을 판단한다.

• Journal of Multimedia Information System
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• 제1권2호
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• pp.127-132
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• 2014

The transverse electromagnetic (TEM) cells are widely used for electromagnetic compatibility (EMC) testing and field probe calibrations. We propose the verification of TEM mode with statistical method using a four-port TEM cell. The verification results are compared with Normal, Rayleigh, and Gamma distribution. As a result, the 75 % quantile of the Rayleigh distribution is excellent agreement with the true quantiles for a number of calibration points.

• Communications for Statistical Applications and Methods
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• 제10권1호
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• pp.145-151
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• 2003

We shall propose several estimators for the scale parameter in the uniform distribution when the parameter is functions of a known exposure level, and obtain expectations and variances for their proposed estimators. And we shall compare numerically relative efficiencies for proposed estimators of the scale parameter in the small sample sizes.

• 한국멀티미디어학회논문지
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• 제10권12호
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• pp.1714-1725
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• 2007

This paper describes a top-down behavior planning framework in a simulation game from personality to real life action selection. The combined behavior creating system is formed by five levels of specification, which are personality definition, motivation extraction, emotion generation, decision making and action execution. Along with the data flowing process in our designed framework, NPC selects actions autonomously to adapt to the dynamic environment information resulting from active agents and human players. Furthermore, we illuminate applying Gaussian probabilistic distribution to realize character's behavior changeability like human performance. To elucidate the mechanism of the framework, we situated it in a restaurant simulation game.

• 한국멀티미디어학회:학술대회논문집
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• 한국멀티미디어학회 2012년도 춘계학술발표대회논문집
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• pp.419-421
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• 2012

멀티미디어 통신을 희망하는 수많은 노드들이 비 균등하게 분포되어 있는 환경에서 PTAS 기법을 사용하여 효과적으로 통신가능하게 하는 통신 네트워크 시스템의 구축이 가능하게 하는 방법을 제안한다.

• 한국IT서비스학회지
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• 제2권2호
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• pp.53-62
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• 2003

Current P2P (Peer-to-Peer) applications have the limited functions such as file search and transfer between peers and have the limitations such as trust problem on search results, copyright problem, and profitable business model problem. For a P2P application to be used as a business platform for the distribution of various multimedia contents, this paper proposes an extended P2P application architecture and its prototype system including distributed collaborative filtering, automated price negotiation system, and payment mechanism.

• 한국환경독성학회:학술대회논문집
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• 한국환경독성학회 2003년도 춘계학술대회
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• pp.149-149
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• 2003

To understand environmental paths of the transport and accumulation of endocrine disrupting chemicals (EDCs), a single cell multimedia fate model has been constructed and evaluated. The EDCs of concern were PAHs, Organochlorine Pesticides (OCPs), PCBs, Alkyl phenols, and phthalates. An evaluation model was designed for the multimedia distribution, including air, water, soil, sediment and vegetation. This model was verified using reported values and via monitoring data. Based on collected data, the distribution trends of EDCs with respect to environmental media were analyzed. Those results have applied to the model for the prediction of the spatial and temporal distribution of EDCs in Seoul. Especially, phenol compound, phthalates, PAHs, PCBs and organochlorine pesticides were estimated and the model was verified. This model was successfully conducted to environmental media, such as air (vapor and suspended particles), soils (forest soil, bare soil, and cement-concrete covered soil), water (dissolved and suspended solids), sediment, trees (deciduous and coniferous). The discrepancies between the model prediction and the measured data are approximately within or near a factor of 10 for the PAHs of three rings through that of six rings, implying that multimedia distribution of the PAHs could be predicted with a factor of 10. Concerning about the air equilibrium may be assumed, a fugacity at steady state is similar in all environmental media. Considering the uncertainties of this model, the use of equilibrium models may be sufficient for assessing chemical fates. In this study, a suggestion was made that modeling and estimation of chemicals in environmental multimedia be rigorously evaluated using the measured flux data. In addition, these data should be obtained, for example, from the precise and standardized inventory of the target chemicals. The model (EDC Seoul) will be refined in an on-going research effort and will be used to support decision-making concerning the management of EDCs.

• ETRI Journal
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• 제32권5호
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• pp.665-675
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• 2010

Recent research on mobile Internet protocol television and digital right management (DRM) interconnections has focused on multimedia technologies designed to enhance content scalability and adaptive content distribution. However, due to the architectural and scalable limitations, recent systems are not flexible and securable with respect to their adaptive content distribution and protective policy management. Therefore, we propose a content protective multi-agent platform that provides secure multimedia services, correlation management, pattern-based management, and multi-source multi-use (MsMu)-based services. Our architecture, supported by DRM, lets us create a rich set of MsMu-based content protection and seamless multimedia services through the extension of one source multi-use (OsMu)-based content services. We have verified our platform, which provides scalable and securable services with a 17% lower service response time by using a testbed.

• 대한전기학회:학술대회논문집
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• 대한전기학회 2005년도 심포지엄 논문집 정보 및 제어부문
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• pp.230-232
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• 2005

This paper proposes a Distributed Transaction models based on the multimedia framework (MPEG-21) in digital convergence environment. Digital media market is growing up rapidly according to the extension of internet and universality of multimedia contents. So, importance of the effective management with the production and distribution of produced multimedia contents is becoming larger. For effective management of multimedia contents, the multimedia contents which are represented with different standard each other can be processed adaptively in the variable network environment. A free compatibility among the different terminals and standards are the essential particular should be offered for the digital convergence environment. A multimedia framework supports this compatibility and various multimedia services. In this paper, the Distributed Transaction models that multimedia contents can be circulated among the individual users safely and freely are proposed and the relation technologies are described.