• Journal of Convergence for Information Technology
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• v.10 no.1
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• pp.22-27
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• 2020

With the deployment of 5G infrastructure, content delivery network (CDN) will be a key role to provide explosive growing services for the independent media and YouTube which contain high-speed mobile contents. Without a local cache, the mobile backhaul and fronthaul should endure huge burden of bandwidth request for users as the increase number of direct accesses from contents providers. To deal with this issue, this paper fist presents both fronthaul solutions for CDN that use dark fibers and a passive optical network (PON). On top of that, we propose the aggregated content request specialized for PON caching and evaluate and compare its performance to legacy schemes through the simulation. The proposed PON caching scheme can reduce average access time of up to 0.5 seconds, 1/n received request packets, and save 60% of backhaul bandwidth compared to the no caching scheme. This work can be a useful reference for service providers and will be extended to further improve the hit ratio of cache in the future.

• Proceedings of the Korean Society of Broadcast Engineers Conference
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• 2010.07a
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• pp.303-306
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• 2010

DMB, IPTV 등의 미디어에서 방송 서비스를 위해 다수의 기송출된 지상파 방송 프로그램을 재가공하여 활용한다. 이를 위한 작업에서 방송 프로그램 앞뒤에 삽입되어 있던 지상파 방송사의 광고를 각 서비스 사업자의 계약 광고로 대체하므로, 광고를 분리하여 방송 프로그램의 본 내용만 인코딩하는 과정이 필요하다. 본 논문에서는 이와 같은 재가공 작업을 위해 방송프로그램 스트림에서 본 내용의 시작 종료점을 검출하는 방법을 제안한다. 이는 디지털 방송 프로그램 스트림으로부터 영상의 특징과 자막 데이터를 추출, 분석하여 판별하는 방법으로, 개별 광고의 특징 데이터를 이용하지 않고 처리한다. 따라서 방송 콘텐츠를 재가공하기 위한 인코딩 시스템에, 모든 광고들을 미리 분석하고 특징 데이터를 추출하는 전처리 과정없이 적용이 가능하다.

• Digital Contents
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• no.11 s.126
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• pp.18-19
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• 2003

이동통신 시장에서 SKT의 시장 점유율이 점차 높아지면서 KTF와 LGT의 가입자 이탈 막기에 비상이 걸렸다.지난 9월말 기준 이동전화 가입자 현황을 살펴보면 SKT는 전달에 비해 6만2,868명이 늘어난 데 반해 KTF와 LGT는 각각 2,053명과 7,541명이 줄어든 것으로 나타났다. 이 같은 현상은 올해 내내 이어지고 있는 상황으로 LGT의 경우 지난 3월 이후 약 11만6,000여명의 가입자가 이탈한 것으로 나타났다.이에 따라 KTF와 LGT는 SKT의 독주체제를 막기 위해 모바일 뱅킹 사업에 대한 전략적 제휴를 체결하는 등 방안 마련에 부심하고 있는 것으로 알려 졌다. KTF의 한 관계자는“이동통신시장의 특성상 지배적 사업자가 갖는 이점으로 인해 이 같은 현상이 나타나고 있지만 한발 앞선 모바일 콘텐츠 서비스 등으로 가입자 기반을 점차 늘려 나갈 계획”이라고 밝혔다.한편, 초고속인터넷 서비스 가입자수의 경우 지난달에 약 5만여명이 늘어나 증가세가 계속되고 있는 것으로 나타났다.

• Proceedings of the Korea Contents Association Conference
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• 2006.11a
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• pp.65-69
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• 2006

Cellular network evolution and development of multi-function cellular phones introduce new mobile business mode. Cellular operators provide mobile internet services using the mobile browser such as ME and WAP and the mobile multimedia platform such as WIPI, J2ME, and BREW. New mobile applications are developed using mobile platforms provided by cellular operators as cellular phones having multimedia solutions such as camera, MP3, MPEG, 3D game engine, DMB, PAN such as bluetooth, IrDA, W-LAN, and location information using GPS are developed. Content providers have problems of redevelopment of a mobile application for different mobile platforms. In this paper, we propose a conversion solution for interoperability of applications developed on different mobile platforms of WIPI and BREW. We analyze APIs of WIPI and BREW and develop conversion solutions.

• The Journal of Korean Institute of Communications and Information Sciences
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• v.32 no.10C
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• pp.1051-1058
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• 2007

Digital Broadcasting Services get abroad from satellite services to terrestrial services and cable services. As broadcasting services become digital from analog, diverse services such as multi-channel, high quality, time-shift function and so on can be possible. It also generates new digital businesses. The Conditional Access System(CAS) is a technology for providing prevention of illegal access to digital contents. It was applied to digital satellite services at Europe and America from the beginning of 90's. In 2002, a domestic digital satellite service provider adopt a CAS system to their broadcasting services. DRM technologies protect intellectual properties and digital rights of digital contents. This paper suggests a design method to construct a CAS system with DRM which can be applied to a CAS for a small digital broadcasting service.

• Journal of Digital Convergence
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• v.11 no.6
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• pp.43-55
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• 2013

This study was to examine the operation strategy of terrestrial broadcasting system on channel image and N-screen service. Nowadays, terrestrial broadcasting system provides video streaming service based on internet. In other words, terrestrial broadcasting system provides N-screen service through TV-PC-Smart phone-Tablet PC. But it is different for terrestrial broadcasting system to analysis the choice criterion of program. Only, channel image of terrestrial broadcasting system expanded into N-screen. Finally, channel image of terrestrial broadcasting system is the competition strategy. It is necessary for terrestrial broadcasting system to prepare the strategy of program choice for users, original contents, new platform and service in connection with N-screen.

• The Journal of the Korea Contents Association
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• v.15 no.8
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• pp.96-108
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• 2015

The market of webtoon is expanding and the main users' acceptance environment of webtoon is changing from web to mobile. Among this phenomena, platform companies combined various digital technologies and a new user interface to the webtoon. The major directions of change in webtoon are applying multimedia effects and actualize the optimized form for the mobile environment represented by a smartphone. This study defined these types of webtoon as 'Webtoon 2.0' and built a separate concept from 'Webtoon 1.0' which means the early form of webtoon. Through this, we propose a new standard in classifying various types of cartoons that are sporadically serviced to users. Also, through experiments with users, we checked the current status of webtoon 2.0 and webtoon 1.0 by quantitatively measuring and analyzing the degree of user satisfaction with the current webtoon. Through this, this study suggest technical and aesthetic development application of Korean webtoon which is available to platform operators, writers and users.

• Journal of the Korea Convergence Society
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• v.13 no.4
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• pp.63-70
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• 2022

Due to the recent changes in the education market and Corona, Consumers have moved to the tutoring and online learning markets, and the large-scale education service franchise business is reorganized into a small-scale franchise, a business model that maximizes the profit structure from a position where sales are important. Recently, a new learning balance model that can provide individualized services from teacher-centered to student-centered, motivate students is required. In this paper, we propose a new mathematical franchise model (K-MODEL) that can improve a company's profit structure while satisfying the recent education trends and consumer needs from the point of view of the franchise. K-MODEL expects franchisor and franchisees to have a stable profit structure by developing differentiated content and services, learning and operating processes, and various programs to improve learning achievement.

• The Journal of the Korea Contents Association
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• v.12 no.4
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• pp.119-132
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• 2012

This study is to consider the major policy issues related to 3DTV in terms of the platform projects, not the terminal and equipment manufacture. It reviews what problems the 3D policy in terms of the platform projects has posed so far, and discusses the issues that may appear when the 3D TV is commercialized in the broadcasting market. The major issues dealt in the study include the frequency policy of the terrestrial platform, the additional services activation of the pay platform players, the retransmission policy of terrestrial broadcasting, and the advertising market policy.

• Journal of Internet Computing and Services
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• v.20 no.6
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• pp.143-156
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• 2019

Discussion on OTT regulation has become fiercer, as OTT services' impacts on the global and domestic media market have been exponentially growing. In South Korea, it is argued that, on the basis of the similarity between television program and OTT's video content, OTT needs to be regulated in order to protect fair competition and to control sociocultural effects. In many of the discussions, developed countries' cases have been used for supporting OTT regulation. In this paper, we first analyzed the global OTT market trends based on our own categorization of OTT services. then we assessed the validity of the application of the foreign cases in the current OTT regulation debates in Korea. We proposed six OTT types (aggregation, mediation, mediation-aggregation, multi-screen, outlet, and outlet-linear) simultaneously considering service operator' origin, business model, content format, and content delivery. These services have been consistently evolving, and the OTT market has been increasingly competitive especially around content differentiation. Regulators must be wary of hastily introducing competition regulation to the dynamically innovating OTT market. The foreign cases, including the US, EU, the UK, and Japan, hardly seem to be appropriate bases for strengthening OTT regulation. Rather, they were focused more on promoting competition in the domestic media market and enriching the content ecosystem. Therefore, we need to consider revision of the outdated media regulation frameworks instead of fitting OTT under them, and to recognize the priority of securing practical jurisdiction on global service providers before capturing local players into the conventional regulation systems.