• 한국방송∙미디어공학회:학술대회논문집
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• 한국방송공학회 2014년도 하계학술대회
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• pp.194-196
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• 2014

증강방송(Augmented Broadcasting) 서비스 기술은 모바일 증강현실(Augmented Reality) 서비스를 TV 방송 환경에 접목하여 스마트미디어 시대의 새로운 방송통신 융합 서비스를 제공할 수 있는 서비스 기술로서, TV 시청자에게 기존 방송프로그램을 시청함에 있어서 좀 더 현실감과 몰입감을 높이기 위한 환경을 제공하고자 하는 것이다. 본 논문에서는 증강방송 시스템을 기반으로 이용자가 상대방에게 작성한 타깃팅 메시지를 수신자가 실시간 방송 시청 중에 소비할 수 있도록 하는 새로운 응용 서비스 기술에 대한 소개와 관련 응용 서버의 설계 및 구현에 관해 설명한다.

• 한국인터넷방송통신학회논문지
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• 제12권3호
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• pp.171-177
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• 2012

최근 복수개의 단말을 가진 사용자들이 끊김없는 연결성을 유지하기 위한 망 이동성 지원에 관한 연구가 진행되어 왔다. 본 논문에서는 LISP 구조에서 망 이동성 지원 스킴을 제안하였다. 제안된 스킴에서 모바일 라우터 접속 동안에 맵 서버에서 EID-to-RLOC 매핑 데이터베이스가 리프레쉬(refresh)된다. 또한 이동 망을 위한 자연스런(smooth) 핸드오프를 지원하기 위한 맵 갱신 방법을 제안하였으며, 성능 분석을 위해 제안된 스킴을 NEMO와 비교하였다.

• International Journal of Internet, Broadcasting and Communication
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• 제9권4호
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• pp.44-50
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• 2017

To understand whether Falling, which is one of the causes of injuries, occurs, various behavior recognition research is proceeding. However, in most research recognize only the fact that Falling has occurred and provide the service. As well as the occurrence of the Falling, the risk varies greatly based on the type of Falling and the situation before and after the Falling. Therefore, when Falling occurs, it is necessary to infer the user's current situation and provide appropriate services. In this paper, we propose to base on Fog Computing and Cloud Computing to design Context-aware System using analysis of behavior data and process sensor data in real-time. This system solved the problem of increase latency and server overload due to large capacity sensor data.

• International Journal of Internet, Broadcasting and Communication
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• 제8권3호
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• pp.41-49
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• 2016

Recently, many biometrics-based user authentication schemes for telecare medicine information systems (TMIS) have been proposed to improve the security problems in user authentication system. In 2014, Mishra et al. proposed an improvement of Awasthi-Srivastava's biometric based authentication for TMIS which is secure against the various attacks and provide mutual authentication, efficient password change. In this paper, we discuss the security of Mishra et al.'s authentication scheme, and we have shown that Mishra et al.'s authentication scheme is still insecure against the various attacks. Also, we proposed the improved scheme to remove these security problems of Mishra et al.'s authentication scheme, even if the secret information stored in the smart card is revealed. As a result, we can see that the improved biometric based authentication scheme is secure against the insider attack, the password guessing attack, the user impersonation attack, the server masquerading attack and provides mutual authentication between the user and the telecare system.

• International Journal of Internet, Broadcasting and Communication
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• 제9권1호
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• pp.42-49
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• 2017

Despite the government's various safety measures, the number of safety accidents continues to rise and the interior is more likely to occur indoors than outdoors. Safety accidents involving young children account for more than 70 % of the safety accidents in the safety accidents, and the ratio of safety accidents in the classroom or classroom is more than 50 %. In this thesis the author proposes the system managing the accidents notification service using LED lighting and access entry control. Utilizing IoT technology, remote control or access can be controlled remotely by controlling multiple lights and entrances from each room and by means of a number of lighting and entrances. By monitoring and analyzing real-time status via server PC and mobile interface, it can control the maximum control and incident prevention, automatic control, and automatic control.

• International Journal of Internet, Broadcasting and Communication
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• 제9권3호
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• pp.35-43
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• 2017

In 2013, Lee-Lie proposed secure smart card based authentication scheme of Zhu's authentication for TMIS which is secure against the various attacks and efficient password change. In this paper, we discuss the security of Lee-Lie's smart card-based authentication scheme, and we have shown that Lee-Lie's authentication scheme is still insecure against the various attacks. Also, we proposed the improved scheme to overcome these security problems of Lee-Lie's authentication scheme, even if the secret information stored in the smart card is revealed. As a result, we can see that the improved smart card based user authentication scheme for TMIS is secure against the insider attack, the password guessing attack, the user impersonation attack, the server masquerading attack, the session key generation attack and provides mutual authentication between the user and the telecare system.

• 한국인터넷방송통신학회논문지
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• 제11권5호
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• pp.107-112
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• 2011

본 논문에서는 본 논문에서는 특정 부위 조명 방법을 제시하고 스케일 스페이스 필터링을 이용한 홍채 영상의 특징 추출방법을 활용한 시스템 구현을 소개하였다. 홍채 영상이 구해지면 중심과 반경을 구한 후 불필요한 부분을 제거한다. 이 영상은 극좌표 영상으로 변환되어 스케일 스페이스 필터링을 한다. 스페이스 필터링 영상에서 특징이 추출되면 홍채 코드가 만들어진다. 동일인 및 서로 다른 사람에 대해 실험한 결과, 제시한 특징추출 방법이 매우 효과적임을 보여주었다.

• Journal of Information Processing Systems
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• 제14권5호
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• pp.1272-1285
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• 2018

The paper presents a novel embedded multifunctional media sever (EMMS) for mobile devices to receive various media programs. Being different from other contemporary system research, the paper mainly studies how to design a reception solution for terrestrial digital television (DTV) on mobile devices and how to enable mobile devices can receive DTV program, enjoy video-on-demand (VOD), achieve video surveillance and relay Internet video program via local Wi-Fi simultaneously. In the system design, we integrate broadcasting-terrestrial DTV tuner, streaming media re-transmission system, VOD disk, video camera and access interface to the Internet into EMMS, which can either receive terrestrial DTV radio signals and demodulate out digital transport stream (TS), or can read streaming media bit-stream from VOD disk, surveillance camera or access interface to the Internet. The experimental results show the proposed system is stable and quality-efficient. Comparing with the other systems, the proposed system has the least packet loss rate and response time.

• 방송공학회논문지
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• 제7권1호
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• pp.66-75
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• 2002

본 논문에서는 기존의 이동사업자가 독점한 무선인터넷 시장에서 이동사업자의 메뉴에서 정보를 획득하고 전달하는 방식과는 달리. 3개 이동사업자의 사용자 에이전트를 식별하는 유.무선 인터넷 통합서버를 이용하여 가수순위, 음악순위. 드라마 순위를 시청자에 능동적인 참여로 방송순위를 집계하는 방송 통계 시스템을 제안한다. 본 논문의 결과로 시청자가 기존의 ARS 방식과 달리. 시간과 장소에 영향을 받지 않고 시청자가 휴대전화를 이용하여 방송사의 유.무선 인터넷 통합서버 URL을 직접 접속함으로서 시청자 참여가 가능하다. 또한. 제안한 본 방식은 타 매체를 이용한 순위 통계시스템과는 달리, 실시간 방송통계의 결과를 알 수 있고. 발신자번호(Caller ID) 추적에 의한 중복투표 방지가·가능함으로서 시청자에게 다양한 형태의 방송참여를 유도할 수 있다.

• International Journal of Internet, Broadcasting and Communication
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• 제10권2호
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• pp.31-38
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• 2018

As the use of open source databases grows, so does need to evaluate, the performance of search queries for these databases. This paper compares the search query performance of SQL-based open source databases with commercial databases through experiments. The targets are MySql, MariaDB, and MS-SQL Server. In this study, the execution time of various types of search queries are measured. Also, search query performance was experimented according to change of index and number of tuples. Experimental results show that SQL-based open source databases have the potential to replace commercial databases when indexes are used and the number of tuples is not very large.