• 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.

• Journal of The Institute of Information and Telecommunication Facilities Engineering
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• v.9 no.1
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• pp.29-34
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• 2010

In this study, we realized the broadband home gateway system of dual mode based upon EDR 2~3Mbps transmission speed and 300Mbps of 802.11n, In broadcasting and telecommunication convergence networks to deliver multimedia services, high-quality home. The bluetooth module is designed to use general low rate data speed service and the 802.11n module also is designed to use high rate speed service at various home network situation. The dual mode home gateway system, bluetooth and 802.l1n module, is well realized for many specification such as emission power, spurious power, impedance matching, frequency channel test.

• International journal of advanced smart convergence
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• v.10 no.4
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• pp.273-277
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• 2021

As society gradually enters a virtual, non-face-to-face society, the use of online content is increasing as well. In particular, as smartphones are thoroughly established in our daily life, the platforms of webtoons, mobile broadcasting, and education are shifting from personal computers to smartphones. Recently, the development of the Over-The-Top media service (OTT service) enabled streaming services of various media contents through the internet and activation of IPTV. Therefore, the rapid increase of popularity of short-form content is a natural phenomenon with smartphone platforms with fast, improvised, and endless communication. Lately, TikTok became the favored platform with prosumers, defined as people who are both producers and consumers. In this study, I studied the experiential response of YouTube and TikTok users as representative examples of a short-form content platform developed after the 2000s, the flourishing years of digital content with a length of 30 seconds.

• International journal of advanced smart convergence
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• v.10 no.2
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• pp.59-63
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• 2021

In order to broadcast 8K UHD, domestic broadcasting is upgrading production, operation, and transmission technologies in a new way that has various forms such as terrestrial broadcasting, IPTV, mobile, and streaming services. In order to overcome the existing SDI transmission technology that has reached its limit, new transmission technologies using ICT-based convergence such as IT, Network, IOT, and Big Data are developing. Internet Protocol(IP) transmission technology is an IT-based core protocol that transcends various broadcasting infrastructures. Therefore, it can be said that the technology for converting the broadcasting system based on IP is a natural one for preparing for 8K UHD in the future. In this paper, we propose an IP transmission system that adopts a network that can transmit 8K with hardware of 12G Serial Digital Interface (SDI), in order to prepare for the future broadcasting system according to the development of ALL IP interface technology.

• Proceedings of the Korea Information Processing Society Conference
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• 2011.04a
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• pp.615-618
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• 2011

본 논문은 IPTV, VoD와 같은 대용량의 비디오 스트리밍 트래픽을 처리함에 있어 큐 길이 변화를 최소화할 수 있는 SCQ(Smoothly Changing Queue) 스케줄링 방안을 제안한다. SCQ는 벌크하게 유입되는 스트리밍 트래픽에 대해 유입되는 패킷 양 및 속도를 고려하여 서비스율을 제어함으로써 큐 길이 변화율을 최소화할 수 있다. 벌크 특성을 갖는 스트리밍 서비스 전달에 있어 종단간 낮은 지연변이를 유지할 수 있으며 제안 방안을 이용할 경우 보다 안정적으로 서비스를 제공할 수 있다. 제안 방안의 유효성을 확인하기 위해 우리는 큐잉 모델을 이용하였으며, 그 결과 기존 평균 큐길이 기반 스케줄링 방안보다 낮은 큐길이 변화율을 보임을 확인하였다.

• Proceedings of the Korea Information Processing Society Conference
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• 2007.11a
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• pp.729-732
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• 2007

맞춤형 방송 솔루션은 디지털 TV 서비스 외에도, 향후 유망기술로 주목 받고 있는 IPTV, DMB 등의 다양한 방송 및 멀티미디어 서비스에 적용이 가능하다. 본 연구에서는 맞춤형 방송 서비스의 객관적인 평가를 위한 성능평가 방법을 제안한다. 정보검색 시스템 평가에 사용하는 정확률, 재현률과 역순위 평균 수치를 적용하여 맞춤형방송의 추천결과와 실제 시청자의 시청 프로그램의 차이를 분석하여 맞춤형 방송 시스템의 정확도와 사용자 만족도를 통계적으로 평가 가능한 메카니즘을 제안한다. 그 동안 평가가 이루어지지 않았던 맞춤형 방송 서비스를 복합적으로 평가하는 방법론을 제안함으로써, 맞춤형 방송 시스템의 지속적인 성능향상과 연구개발에 기여할 것이다. 또한, 맞춤형 방송 서비스의 산업화와 다양한 장비로의 확산에도 기여할 것으로 기대된다.

• Journal of Broadcast Engineering
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• v.17 no.2
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• pp.270-283
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• 2012

With the advent of multi-channel TV, IPTV and smart TV services, excessive amounts of TV program contents become available at users' sides, which makes it very difficult for TV viewers to easily find and consume their preferred TV programs. Therefore, the service of automatic TV recommendation is an important issue for TV users for future intelligent TV services, which allows to improve access to their preferred TV contents. In this paper, we present a recommendation model based on statistical machine learning using a collaborative filtering concept by taking in account both public and personal preferences on TV program contents. For this, users' preference on TV programs is modeled as a latent topic variable using LDA (Latent Dirichlet Allocation) which is recently applied in various application domains. To apply LDA for TV recommendation appropriately, TV viewers's interested topics is regarded as latent topics in LDA, and asymmetric Dirichlet distribution is applied on the LDA which can reveal the diversity of the TV viewers' interests on topics based on the analysis of the real TV usage history data. The experimental results show that the proposed LDA based TV recommendation method yields average 66.5% with top 5 ranked TV programs in weekly recommendation, average 77.9% precision in bimonthly recommendation with top 5 ranked TV programs for the TV usage history data of similar taste user groups.

• Journal of Broadcast Engineering
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• v.13 no.5
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• pp.622-635
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• 2008

Recently, high definition media services like HDTV and IPTV are growing. A fast reduced-size image extracting method is required to meet what those services require. Conventional DC image extracting methods, however, can't be applied to H.264/AVC streams since a spatial domain prediction scheme is adopted in H.264/AVC intra mode. To solve this problem, a thumbnail extraction method in H.264/AVC was proposed. However, the method has mismatch problem which was caused by round-off operation in intra prediction and mismatch between integer and floating point calculation. In this paper, we propose an error compensation method for extracting thumbnail directly in H.264/AVC bitstreams. The compensation method introduces the mismatch problem in thumbnail extraction and presents compensation values. Through the implementation and performance evaluation, proposed method compensated round-off error efficiently in D1 and HD sequences while the additional extraction time is negligible.

• KDI Journal of Economic Policy
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• v.33 no.4
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• pp.85-118
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• 2011

This paper uses the horizontal regulation system as the base analysis framework. The study clearly defines the regulatory goals of the followings: the horizontal cross-ownership regulations on program provider (PP) and platform provider, the vertical regulation on cross-ownership between PP and platform operator, the regulation on cross-ownership of program provider by terrestrial broadcasting company, and the regulation on cross-ownership between terrestrial broadcasting company and platform provider. Then, by analyzing the conformity between goals and criteria of regulations and the adequacy of the regulation level according to regulatory purposes, this paper examines the justifiability of each regulation and extracts improvement measures that suite regulatory purposes. This analysis finds following appropriate measures: replacing the horizontal cross-ownership regulation on PP with conduct regulations, such as designating major broadcasting programs or replacing the current criterion of cross-ownership regulation from sales to the audience market share; reshaping the horizontal cross-ownership regulation on platform provider so that system operator (SO), satellite broadcaster and Internet protocol television (IPTV) operator would be applied by the same regulation based on the number of subscribers of pay television services; and discontinuing other cross-ownership regulation. In this way, the study shows that with appropriate regulations on cross-ownership of PP, there would be no need for additional regulation on vertical integration between PP and platform operator. On the other hand, given that the regulation on terrestrial broadcasting cross-ownership of PP could be justified only by regulatory purpose of the protection of the diversity of public opinions, it would be desirable to replace the current criteria of the number of PPs with the criteria of the audience market share. Lastly, the study shows that when platform operator is targeted by the cross-ownership regulation based on the number of subscribers of pay television services, the regulation on cross-ownership between terrestrial broadcasting company and platform provider should be replaced with conduct regulations, such as designating must-offer channels and major broadcasting programs.

• Journal of Broadcast Engineering
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• v.13 no.2
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• pp.222-235
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• 2008

Recently, as growing of high definition media services like HDTV and IPTV, fast moving picture manipulation techniques need to meet what those services require. Especially, a fast reduced-size image extracting method is required in the areas of video indexing and video summary Conventional DC image extracting methods, however, can't be applied to H.264/AVC streams since a spatial domain prediction scheme is adopted in H.264/AVC intra mode. In this paper, we propose a theoretical method for extracting a thumbnail image from an H.264/AVC intra frame in the frequency domain. Furthermore, the proposed scheme can extract the thumbnail very fast since all operations are applied to transform coefficients directly, after a general equation for the thumbnail extraction in nine H.264/AVC intra prediction modes is introduced, an LUT(Look Up Table) for each mode is designed. Through the implementation and performance evaluation, while the subject quality difference between the output of our scheme and a conventional output is negligible, the former can extract the thumbnail faster then the latter by up to 63%.