• Proceedings of the KIEE Conference
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• 2015.07a
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• pp.39-40
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• 2015

가정용 가전제품의 전력사용량을 절감하기 위한 방법은 인력과 ICT 융합형 관리시스템으로 가능하다. 인력에 의한 방안은 사용하지 않는 가전제품의 코드를 매번 콘센트와 분리하여야 하는 번거로움이있어 효과가 있음에도 활용도가 낮았다. 반면에 통합관리스템은 전체 가전제품을 원격으로 관리할 수 있도록 하나의 네트워크로 묶어 모니터링하고 관리하는 기술을 구현해야 하는 어려움이 있다. 본 논문에서는 스마트 플러그와 IPTV를 이용하여 대기전력의 차단과 사용량을 절감하기 위한 방안을 제시하고자 한다. 이를 통해 소요되는 비용을 최소화하고 이용은 편리하게 하여 성과를 높이고자 한다.

• The Journal of Society for e-Business Studies
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• v.16 no.4
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• pp.283-299
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• 2011

In this paper, we draw upon Task-Technology Fit theory to investigate the fit attributes which impacted on customer preference over three virtual shopping channels which included TV home shopping, Internet shopping, and broadband applications, i.e. IPTV. The fit attributes also reflected the product category contingency, which is classified based on the degree of quality assessing difficulty on the web, such as quasi-commodity, look and feel goods, and look and feel with variable quality goods. Using the collected survey data, we employed stepwise regression analysis to validate the fit attributes in the context of performing virtual shopping task via those three distinctive media technologies. Furthermore, through ANOVA test with Duncan statistics, we reported comparative intensity of the valid fit attributes across the product categories and distinct media technologies. The results validated four critical fit attributes and significant distinctions among product categories and three virtual shopping channels. The findings provide practical insights in distribution channel design exploiting digital convergence technologies.

• Information and Communications Magazine
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• v.28 no.1
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• pp.4-8
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• 2010

디지털 기술이 발전하고 네트워크가 고도화되면서 방송과 통신, 그리고 미디어의 경계가 허물어지는 '디지털 융합'이 빠르게 진행되고 있다. IPTV 서비스가 출시 2년 만에 가입자가 3백만 명을 넘어설 것으로 예상되고, 디지털방송이 도입된 지 10년도 지나지 않았는데 벌써 디지털 3D 방송으로 진화하고 있다. 통신과 인터넷 분야 또한 급격한 변화의 바람이 불고 있다. 혜성처럼 나타난 스마트폰은 기존 휴대폰을 새로운 흐름에 뒤처지는 유물로 전락시키고 있으며, 앱스토어, 태블릿PC, 스마트TV 등 하루가 다르게 새로운 방송통신 서비스와 콘텐츠들이 등장하고 있다. 본 고에서는 이러한 방송통신 시장의 최근 변화의 흐름을 살펴보고, 이러한 상황에서 우리나라가 새로운 방송통신 기술과 서비스를 선도해 나가기 위해 집중해야 할 주요 과제와 정책방향, 그리고 이를 대비하는 우리 모두의 바람직한 대응방안을 살펴본다.

• Proceedings of the IEEK Conference
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• 2007.07a
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• pp.173-174
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• 2007

최근 디지털 정보기술의 급격한 발전으로 네트워크, 서비스, 단말이 융합되는 BcN 사회로 진화하고 있다. 이에 따라 새로운 융합 서비스 개발을 용이하게 하는 open API 기술에 대한 필요성이 대두되어 왔다. 통신망 사업자의 자원을 서비스 제공자에게 open API를 통하여 개방하면, 서비스 개발자들은 네트워크 프로토콜에 대한 지식이 없어도 open API를 호출하여 복잡하고 다양한 서비스를 쉽게 개발할 수 있다. 본 논문에서는 이동 가입자의 위치주소를 제공하는 Geocoding 기능을 open API로 정의하고, 이를 응용한 Family Finder on TV 서비스에 대해 살펴본다.

• The Journal of the Korea Contents Association
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• v.10 no.3
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• pp.32-43
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• 2010

IPTV is an emerging technology that combines both broadcasting and tele-communication technologies, and provides various multi-media contents to the service subscribers. In general, IPTV broadcasters transmit scrambled signals (multi-media contents) to the paying subscribers, and the users within the acknowledged network descramble the signals using the smart-card. That is, users are verified through communication between STB (Set-Top Box) and smart-card. In 2004, Jiang et al. proposed a secure protocol regarding the verification process. The method has been modified and enhanced by several following research works. However, all the methods that have been proposed so far required modular exponentiation operations which may raise the smart-card costs. In this paper, we propose a new efficient mutual authentication and session-key establishment protocol using only hash functions and exclusive-or operations, and show that the proposed protocol is still secure under various security attacks.

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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• 2010.10a
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• pp.643-645
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• 2010

The Internet-based multimedia services such as IPTV is being expanded with the development of technology to support the convergence of broadcasting and telecommunications technology for the control seems to be growing larger. Especially for the real-time TV broadcast multicast control technology to support the authentication and resource control, in addition to the technology services that enhance the value of technology for a variety of services in both directions seems to be developed. And, Internet-based transmission system transmit the video content for the video content delivery using RTP(Real Time Transport Protocol). Standardization body, IETF(Internet Engineering Task Force) within the RTP, according to a variety of audio and video formats only transmission format(RTP Payload Format) Establish a separate standard and scalable video content "RTP Payload Format for SVC(Switched Virtual Connection) Video" the standardization is currently processing. In this paper we are improving the quality of broadcasting and telecommunication systems, so that the upper layer by the application can react adaptively to the existing MPEG2-TS and RTP who are provided by a variety of content applied to a variety of devices consumers ETE(End- to-End) QoS(Quality of Service) for enhance the system who was designed and implemented.

• The Journal of Korean Institute of Communications and Information Sciences
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• v.35 no.3B
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• pp.503-516
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• 2010

In this paper, we propose the converged profile and authentication scheme for supporting converged media services of broadcasting & communications convergence in fixed mobile convergence networks. The proposed scheme supports the management of access, service, mobility and IPTV profiles on subscriber and a function of open API(Application Program Interface) for providing the subscriber profile for the third party service provider with the PUSH/PULL method. The open API is based on a web service and a REST(Representational State Transfer) and provides various services for the third party service provider with ease. In addition, the proposed scheme supports a function of SSO(Single Sign-on). After user succeeded in establishing an access connection, user can sustain the same authentication state with this function although connected access network is changed or IMS(IP Multimedia Subsystem) service network is attached. We evaluate and analyze the performance of the proposed scheme through the implementation of CUPS(Converged User Profile Server) system test-bed.

• The KIPS Transactions:PartB
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• v.18B no.6
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• pp.365-374
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• 2011

Recently, malicious video classification and filtering techniques are of practical interest as ones can easily access to malicious multimedia contents through the Internet, IPTV, online social network, and etc. Considerable research efforts have been made to developing malicious video classification and filtering systems. However, the malicious video classification and filtering is not still being from mature in terms of reliable classification/filtering performance. In particular, the most of conventional approaches have been limited to using only the spatial features (such as a ratio of skin regions and bag of visual words) for the purpose of malicious image classification. Hence, previous approaches have been restricted to achieving acceptable classification and filtering performance. In order to overcome the aforementioned limitation, we propose new malicious video classification framework that takes advantage of using both the spatial and temporal features that are readily extracted from a sequence of video frames. In particular, we develop the effective temporal features based on the motion periodicity feature and temporal correlation. In addition, to exploit the best data fusion approach aiming to combine the spatial and temporal features, the representative data fusion approaches are applied to the proposed framework. To demonstrate the effectiveness of our method, we collect 200 sexual intercourse videos and 200 non-sexual intercourse videos. Experimental results show that the proposed method increases 3.75% (from 92.25% to 96%) for classification of sexual intercourse video in terms of accuracy. Further, based on our experimental results, feature-level fusion approach (for fusing spatial and temporal features) is found to achieve the best classification accuracy.

• Journal of Broadcast Engineering
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• v.12 no.2
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• pp.80-92
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• 2007

IPTV Services that is representative union service of broadcasting and telecommunication need guarantee of QoS, efficiency of multicasting, and hish bandwidth on the network. Because typical TDM based metro transport network was designed by transporting fixed voice traffic with stable and recovering method, it has a defect of bottleneck and a waste of bandwidth for acceptance of data traffic with burst feature and then all of data are treated equally at the transport network because it cannot classify between advanced high end service and best effort low end service. for completely resolving this kind of problem about increasing burst traffic and QoS issues, firstly we need to new design for transport network. This paper presents transformation method from TDM based metro transport network to packet based transport network and advantage and effectiveness of packet based transport network and also indicates technical factor and characters about method of packet transport system. As a result of research, the Packet Transport System, which is a transmission network for packet delivery, take in not only a specific character of legacy TDM but QoS, Multicast and high bandwidth, then, it is able to keep an effective bandwidth and a stabilized performance of packet transmissions. Additionally, if a fault be occurred on an optical link, the system is able to guarantee a differential QoS by an each service class using an algorithm to make certain of a traffic existence and contain a protective mechanism.

• Electronics and Telecommunications Trends
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• v.26 no.4
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• pp.31-42
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• 2011

지상파 DMB 서비스가 시작된지 5주년을 맞은 지난해 12월, 누적단말판매량이 4천만 대를 넘는 것으로 추산되는 등 지속적인 성장을 보이고 있지만 정작 서비스를 제공하는 지상파 DMB 방송 사업자는 광고 및 채널 임대 외에 특별한 수익모델을 찾지 못해 고전하고 있다. 지상파 DMB 전체 광고매출이 2006년 약 17억 원에서 2010년 약 210억 원 정도로 꾸준히 늘고 있지만 사업 규모에 비해 턱없이 부족한 실정이고 모바일 IPTV, 스마트폰의 등장으로 새로운 환경 변화에 적응해야 하는 어려움도 있다. 본 고에서는 스마트 모바일 DMB라는 이름으로 방송통신 융합 측면에서 지상파 DMB 서비스의 변화에 대한 동향을 살펴보고자 한다. 방송 사업자와 통신 사업자가 협력을 통해 서비스를 제공한 DMB2.0 서비스, 스마트폰과의 동거를 시작하는 스마트 DMB 서비스를 살펴보고 올해부터 기술개발이 추진되는 스마트 모바일 하이브리드 DMB를 소개한다.