• Proceedings of the Korean Society of Broadcast Engineers Conference
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• 2013.06a
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• pp.111-112
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• 2013

기존의 T-DMB 표준 문서에서는 T-DMB 기반의 비디오 서비스를 무료 서비스로 규정하여 스크램블링을 수행할 수 없도록 제한 사항을 두고 있다. 그러나, 최근의 T-DMB 수익 구조 개선의 노력과 차세대 T-DMB(AT-DMB) 기술의 등장으로 T-DMB 기반의 유료 비디오 서비스에 대한 관심이 점차 증대되고 있다. 본 논문에서는 유료 서비스 관련 기존 T-DMB 표준 문서들을 분석하여, T-DMB 채널을 통한 유료 비디오 서비스를 제공하기 위한 효율적인 시그날링 및 스크램블 방법을 제안한다. 제안된 방법은 기존의 비디오 서비스와 역호환성을 유지하여 이미 보급된 T-DMB 수신 단말에 문제점을 야기하지 않는 것을 특징으로 한다.

• Journal of the Korea Society for Simulation
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• v.19 no.2
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• pp.137-145
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• 2010

This study presents an RTS(Real-time Traffic System) based on an LBS(Location Based Service) using 5.8~5.9GHz RSU(Road Side Unit). The proposed LBI(Location based Broadcast system on ITS) is a local information-based service supported by RSU for drivers, which has a feature of convergence between T-DMB system and ITS-based RTS. The convergence of local broadcasting station and ITS is realized by two-way communication and supports LBS(Location Based Service) by identifying of vehicle's location using RSU. Real-time information delivery and various services could be provided by information exchanges between LMM and local broadcasting stations. Furthermore, conventional technical limitations have been solved mutually such as transmission area limitation in RTS and one-way communication problem in T-DMB. This support real-time two-way communication to each driver. Therefore, it can be expected that traffic dispersion effects and services expansion for drivers by RTS and LBI. Finally, it is proposed to built and implement test-bed around institute.

• Journal of Korea Multimedia Society
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• v.15 no.5
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• pp.615-623
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• 2012

This paper presents T-DMB AEAS (automatic emergency alerting service) receiver model considering emergency region. The proposed receiver model determines the geographical location of the terminal by analysing the received T-DMB signal and displays the AEAS messages only if the location of terminal is similar to the emergency site. First, to determine the geographical location of the terminal, we extract the TII value from the null symbol of the SC and, based on it, calculate the location of transmitter by analysing FIG 0/22 delivering the TII-related data. The proposed algorithm sets the location of transmitter as that of receiver and displays the emergency message only in the case of the similar region. The experiment was conducted in the test environment of low power T-DMB generator based on the T-DMB AEAS messages.

• Proceedings of the Korean Society of Broadcast Engineers Conference
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• 2013.06a
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• pp.237-238
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• 2013

기존의 T-DMB 방송은 기본적인 오디오/비디오 서비스와 함께 BWS, Slideshow, TPEG 등과 같은 다양한 형태의 부가데이터 서비스를 제공할 수 있다. 그리고 최근 성공적인 AT-DMB 시험방송과 더불어서 DMB-ECG, DMB 파일캐스팅, 맞춤형 DMB 서비스 등과 같은 다양한 메타데이터 규격을 활용한 고품질의 부가데이터 서비스 표준화가 완료되었다. 본 논문에서는 고품질의 부가데이터 서비스의 일환인 후각기반 감성미디어 서비스 제안하고, DMB 데이터채널을 통한 시그널링 정보 송수신 방법과 기존의 DMB 소비단말과의 역호환성을 고려한 감성미디어 DMB 소비단말 구조를 제안한다.

• 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.

• Proceedings of the IEEK Conference
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• 2006.06a
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• pp.75-76
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• 2006

A new broadcasting standard for Digital Multimedia Broadcasting(DMB) has been announced in Korea to provide audio, video, and data broadcasting services. There exist two types of DMB; terrestrial DMB and satellite DMB. And in order to service DMB on the single system, the integration of RF module is required. In this paper, we describe an integrated RF tuner module that can receive T-DMB and S-DMB at the same time, which includes an L-band down-converter, a Band III tuner, and a S-DMB tuner.

• The Journal of the Institute of Internet, Broadcasting and Communication
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• v.10 no.3
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• pp.69-74
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• 2010

Due to a development of information and communications technology, now we can watch TV show whenever and wherever we want through DMB service. And this is different from existing TV service which we can just enjoy at certain place. Now, I will look into IPTV technology which is basis of Mobile IPTV service. And then, I will introduce Mobile IPTV service which combines the virtues of 'Mobility' of DMB technology and 'two-way communication' of IPTV technology and lets us enjoy two-way TV service at anytime and anywhere. And also I will check the problems of IPTV, on-going trend of Mobile IPTV(in service), and the perspective of Mobile IPTV. Finally, we suggest new fast duplicate address detection scheme in Mobile IPTV to support seamless IPTV packet transmission.

• ETRI Journal
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• v.26 no.4
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• pp.367-370
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• 2004

A new transmission system is necessary for the Digital Multimedia Broadcasting (DMB) service in Korea. Therefore, in this paper, we propose a new architecture for the implementation of a DMB transmission system based on Eureka-147. We describe the design and implementation of the Ensemble remultiplexer, which is essential to the proposed system for remultiplexing ETI frames and MPEG-2 transport streams. The proposed system provides a solution with high flexibility and low cost for multimedia broadcasting service. The functions of this transmission system have been verified by using our DMB receiver and other related systems.

• Proceedings of the IEEK Conference
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• 2008.06a
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• pp.369-370
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• 2008

The DMB standards allow to transmit IP data on IP Tunneling. It is able to DMB data localcasting services using technologies as assigning IP address, encapsulating IP packets, guiding IP data service and, exchanging IP packet at the local area. As the result of that, we can have good experiences as rich and localized multimedia on the DMB networks.

• Journal of Broadcast Engineering
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• v.15 no.2
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• pp.304-312
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• 2010

This paper presents the design of alert message and message segmentation method for the Terrestrial DMB Automatic Emergency Alert Service Standard. This paper begins with the introduction of the standard and some background. The alert message contains the essential information of the alert. Structured information is represented as coded fields and the unstructured as short sentences. Design factors of each field are analyzed first. Next each field’s semantics and syntax are described. The message segmentation method is presented next. The previous study selected FIDC as the message delivery channel. However, in most cases, the size of the alert message exceeds the maximum size of FIG, which is the basic unit packet for the channel. The current T-DMB standard does not support the segmentation method for FIDC. To solve the problem, this paper proposes an elegant segmentation method that garantees reliable, flexible, and fast receiver characteristic. This paper concludes with some additional tasks that should be resolved before the full-time alert service.