• Journal of KIISE:Software and Applications
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• v.36 no.7
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• pp.539-547
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• 2009

Software product line (SPL) engineering is an emerging paradigm for successful software reuse and has been adopted for various industrial and consumer products to improve their productivity and quality. However, most SPL methods require high initial costs and long development time, which makes many companies hesitate to adopt the SPL paradigm. In this paper we introduce a method to construct an SPL by extracting core assets from legacy components based on the feature model, which requires less initial time and effort. We also present a case study on cable set-top box software to illustrate the applicability of this method, and lessons learned that will provide guidelines for many companies to adopt the SPL paradigm.

• The KIPS Transactions:PartC
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• v.17C no.1
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• pp.37-46
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• 2010

In an IPTV system, the rights of the content and service provider can be protected by using Conditional Access System (CAS) and Digital Right Management (DRM). In case of the CAS, only the authorized user who has structured authentication keys can decrypt the encrypted content. However, since the CAS establishes a secure channel only between content provider and Smart Card (SC), it cannot protect the system against McCormac Hack attack which eavesdrops on unsecure channel between SC and Set-Top Box (STB) and SC cloning attack. In this paper, we propose a robust multi-STB assisted SC / STB authentication protocol which can protect the IPTV system against not only McCormac Hack attack, but also SC cloning attack. The previous works which bind a STB and a SC during the SC registration phase against the SC cloning attack does not support multi-STB environments. The proposed system which dynamically updates the STB information in subscriber management system using the bi-directional channel characteristic of IPTV system can support the user's multi-STB device effectively.

• Journal of the Korea Institute of Information and Communication Engineering
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• v.18 no.3
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• pp.569-575
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• 2014

These days as smart TVs or android set top boxes have come into wide use, VoIP(Voice over Internet Protocol) services such as the Skype which can beused on computer system, can be also accessed by smart TVs or set top boxes. and the various kinds of distance learning programs have been developed on smart TVs or set top boxes. but when users have utilized a webcam with smart TVs or set top boxes, users have to go in front of smart TVs or set top boxes In this research paper, the new technology can be solved the problem of webcam use according to chaned environment. This tech is related with the wireless webcam one which can be applicable to open spaces such as living room with some distance between user and smart TV. There are few problems in long distance the test results show high reliability in living room with some distance.

• Journal of the Korea Institute of Information Security & Cryptology
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• v.20 no.3
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• pp.67-78
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• 2010

CAS(Conditional Access System) is used in Pay-TV System to prohibit unauthorized user(s) accessing the contents in IPTV broadcasting environment. In the CAS, Smartcard transfers CW which is necessary in the process of descrambling the scrambled program to STB. CW hacking problem is one of the most serious problems in pay-TV system. There have been many researches on generating secure communication channel between smartcard and STB for secure transmitting, But they had problems in efficiency and security. In this paper, we propose a lightweight key agreement protocol based on a symmetric key algorithm. We show that our proposed protocol is more efficient than existing protocols by comparing the amount of computations, and analyzing the security requirement of the proposed protocol.

• Journal of Intelligence and Information Systems
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• v.29 no.2
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• pp.323-338
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• 2023

TV advertising with deep analysis of watching pattern of audiences is important to set-top box audience targeting. Applying session-based recommendation model(SBR) to internet commercial, or recommendation based on searching history of user showed its effectiveness in previous studies, but applying SBR to the TV advertising was difficult in South Korea due to data unavailabilities. Also, traditional SBR has limitations for dealing with user preferences, especially in data with user identification information. To tackle with these problems, we first obtain set-top box data from three major broadcasting companies in South Korea(SKB, KT, LGU+) through collaboration with Korea Broadcast Advertising Corporation(KOBACO), and this data contains of watching sequence of 4,847 anonymized users for 6 month respectively. Second, we develop personalized session-based recommendation model to deal with hierarchical data of user-session-item. Experiments conducted on set-top box audience dataset and two other public dataset for validation. In result, our proposed model outperformed baseline model in some criteria.

• Venture DIGEST
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• s.56
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• pp.22-23
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• 2004

지난 7월 15일 엔씨소프트가 런던에 자회사를 설립하고, 본격적인 유럽 온라인 게임시장에 진출한다고 발표하였다. 또한 한달 전인 6월엔 휴맥스의 셋톱박스가 영국 시장에서 최우수 상품으로 선정됐다는 소식이 전해지기도 했다. 연이은 뉴스를 계기로 아시아 지역에 편중된 게임업계를 비롯한 문화벤처 기업들의 관심이 유럽에 쏠리고 있다. 이에 또다른 신대륙 유럽의 현황과 진출전략을 차례로 알아본다. 그 첫 번째는‘유럽의 관문’영국편이다.

• 정보보호뉴스
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• s.137
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• pp.46-49
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• 2009

IPTV는 초고속인터넷망을 이용하는 양방향 TV 서비스로, 기존 인터넷TV와 다른 점은 컴퓨터 모니터 대신 TV 수상기를 이용하고 마우스 대신 리모콘을 사용한다. IPTV 서비스는 인터넷이 연결된 TV 수상기, 셋톱박스만 있으면 이용할 수 있다. 그리고 IPTV는 1,000개 이상의 고화질 채널에 있어 채널수가 제한된 케이블TV 보다 많은 종류의 서비스가 가능하다. 그런데 최근 이런 IPTV 서비스에 대한 궁금증이 증가하고 있다.

• 정보화사회
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• s.175
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• pp.48-51
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• 2005

초고속인터넷, 무선통신의 보급과 유비쿼터스 환경으로 발전하면서 기반기술인 임베디드 시스템의 중요성이 커지고 있다. 임베디드 SW는 휴대폰, 디지털 TV, 셋톱박스, 홈네트워크는 물론 스마트카드, RFID, 센서노드 등 광범위한 분야에서 활용된다. 향후 임베디드 SW의 개발 경쟁력은 국가 경쟁력의 지표가 될 전망이어서 중요성이 더욱 커질 것으로 보인다.

• Proceedings of the Korean Information Science Society Conference
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• 2003.04d
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• pp.518-520
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• 2003

데이터 방송을 셋톱 박스에서 시청하기 위해서 여러 가지 표준적인 플랫폼들이 존재하는데, 각 플랫폼마다 컨텐츠 표현 언어가 존재한다. 이러한 각 컨텐츠 표현 언어를 처리해주기 위해서는 데이터 방송 용 브라우저가 필수적인데, 본 논문에서는 DVB-MHP 플랫폼에서 DVB-HTML 어플리케이션의 처리가 가능한 내장형 브라우저를 설계하고 구현하였다.

• Journal of Digital Convergence
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• v.11 no.5
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• pp.299-305
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• 2013

Internet Data is hugely increased for high quality multimedia services and the related techniques is also developed rapidly. This paper is aimed to develop integrated internet data and Digital-Television receiving system with high performance and optimization, which is obtained by one-board integration with load control. It is applicable to various devices like computer, set-top box, home multimedia gateway etc. The performance is proved by evaluation test. It shows that the developed device can be TV tuner and internet AP for more robust multimedia services.