• ETRI Journal
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• 제28권3호
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• pp.364-366
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• 2006

This letter introduces an efficient transmission of traffic information through a terrestrial digital multimedia broadcasting system, which is a multimedia and mobility empowered option of the European digital audio broadcasting system. By adapting Korean characteristic traffic information into the transport protocol expert group messages in the traffic information delivery, a highly efficient traffic information system was implemented and tested in Korea.

• ETRI Journal
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• 제27권1호
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• pp.102-105
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• 2005

In this letter, we present a layered structure of the Korean terrestrial Digital Multimedia Broadcasting (TDMB) transmission system for multimedia broadcasting service and introduce a device called the Ensemble Remultiplexer which is designed to remultiplex the Ensemble Transport Interface (ETI) for T-DMB service. This letter describes the remultiplexing process of the Ensemble Remultiplexer.

• ETRI Journal
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• 제26권2호
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• pp.112-121
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• 2004

Digital Multimedia Broadcasting (DMB) is an upcoming standard in Korea used to provide mobile multimedia broadcasting service based on the Eureka-147 Digital Audio Broadcasting (DAB) system. The current dominant multimedia coding standard, MPEG-4, is foreseen to play an important role in forthcoming DMB services. However, the current approaches for transporting MPEG-4 content over DMB networks are not optimized. To address this issue we propose a novel MPEG-4 stream multiplexer, called M4SMux, which provides better stream multiplexing and delivery over DMB networks. M4SMux features an MPEG-4 elementary-stream interleaving mechanism that reduces the multiplexing overhead and a multiplex configuration mechanism that utilizes M4SLinkTable for easy content access. In addition, we propose an error correction method which enhances transport efficiency.

• 방송공학회논문지
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• 제8권4호
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• pp.465-472
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• 2003

본 논문에서는 지상파 이동 멀티미디어 방송(Digital Multime야a Broadcasting, DMB) 서비스를 위한 멀티미디어 재생기의 플랫폼과 구조를 설계 구현한다. 지상파 DMB 방송은 유럽의 Eureka-147 방식의 DAB(Digital Audio Broadcasting)를 기반으로 하며 디지털 라디오방송과 함께 오디오 외에도 다양한 멀티미디어를 전송하고, 콘텐츠에 대화형 기능을 포함하는 서비스 형태를 목표로 하고 있다. 이는 향후 지상파 DMB 수신기가 단순한 멀티미디어의 재생뿐 아니라, 다양한 서비스의 수용, 기존의 이동단말과의 결합, 하나의 수신기를 이용한 다기능 등의 새로운 형태의 구조를 요구한다는 것을 뜻한다. 그러나 현재 지상파 DMB 방송 규격은 지상파 디지털 텔레비전 방송의 ATSC(Advanced Television Systems Committee) 방식과는 다르며, 한국을 제외하고는 세계 어느나라에서도 이를 이용한 멀티미디어 방송 규격이 정해진 바 없기 때문에 DMB 방송을 수신할 수 있는 수신기 구조조차 존재하지 않는다. 이러한 상황에서 본 논문에서 제공하는 지상파 DMB 방송을 위한 멀티미디어 재생기 플랫폼은 국내 업체들에게 관련 기술을 제공함으로써 수신기 개발기간을 단축하고 지상파 DMB수신기의 향후 발전 방향을 제시할 수 있을 것으로 예상된다.

• ETRI Journal
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• 제26권4호
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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.

• Journal of information and communication convergence engineering
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• 제6권3호
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• pp.266-269
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• 2008

Layered structure of the Korean terrestrial Digital Multimedia Broadcasting (TDMB) transmission system for multimedia broadcasting service is presented in this paper. We made a switching module which is called the Ensemble Remultiplexer. It is designed to remultiplex the Ensemble Transport Interface (ETI) for T-DMB service. This paper describes the remultiplexing process of the Ensemble Remultiplexer.

• ETRI Journal
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• 제28권5호
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• pp.561-573
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• 2006

In this paper, we present a practical implementation of the MPEG-21 multimedia framework for broadcasting and communication convergent services. MPEG-21 standard technology was exploited to build a convergent service framework. Using this framework, a service model and several scenarios have been successfully designed and implemented. In addition, interoperability, which is the main objective of a multimedia framework, especially in a convergent environment consisting of heterogeneous networks and various types of devices, has been addressed in detail. The experimental results show that the implemented test bed provides a next-generation multimedia service; that is, universal multimedia access (UMA), meeting the requirements of a broadcasting and communication convergent environment.

• 방송공학회논문지
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• 제8권3호
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• pp.250-258
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• 2003

최근 디지털 멀티미디어 방송 기술의 발전에 따라 기존 아날로그 방송의 디지털화가 추진되고 있다. 라디오 방송의 경우 국내에서는 Eureka-147 DAB(Digital Audio Broadcasting)시스템을 디지털 라디오 방송 방식으로 결정하였다. DAB는 CD 수준의 고품질오디오는 물론 다양한 데이터 서비스, 우수한 이동수신 성능 등을 제공할 수 있으며, 국내에서는 DAB를 이용한 동영상 멀티미디어서비스의 특성을 강조하기 위해 DMB(Digital Multimedia Broadcasting)로 개칭하였다. 디지털 방송의 경우 송신기 커버리지와 수신품질을 조사하는데 있어서 비트오류율(BER Bit Error Rate) 측정이 필수적이다. 본 논문에서는 지상파 DMB에서의 비트오류율 측정을 위한 효율적인 서브채널 데이터 구조와 알고리즘을 제안하고 실험을 통해 검증하였다. 제안된 방법은 비트오류율 측정을 위한 동기화가 용이한 장점이 있고. 특히 수신에 실패한 CIF(Common Interleaved Frame)의 수를 알아내어 포함된 비트들을 오류로 분류함으로써 정확한 측정 결과를 제공할 수 있다. 이러한 장점으로 인하여 제안된 측정 시스템은 이동 수신으로 인한 채널상황에 변화가 많은 DMB에 더욱 유용하게 적용될 수 있다.

• ETRI Journal
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• 제26권2호
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• pp.136-148
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• 2004

It is expected that an intelligent broadcasting service (IBS) will be able to provide broadcast programs based on user preference and program-associated information (metadata) in order to assist users in easy navigation of the program content being broadcast. In this way, users will be able to access program content anytime, anywhere, and in the manner they wish. This type of IBS will be a basis for future broadcasting services such as customized broadcasting or personal casting. In this paper, we introduce an agent-based multimedia broadcasting framework using the Foundation for Intelligent Physical Agents (FIPA) and MPEG-7 technologies within MPEG-21. We use a FIPA implementation called FIPA open source as a platform for exchanging user preferences and program information as FIPA messages between a server and its clients. The user preference is modeled as the User Preference description scheme in MPEG-7 multimedia description schemes. We discuss a framework structure and implementation for the IBS.

• 한국방송∙미디어공학회:학술대회논문집
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• 한국방송공학회 2004년도 정기총회 및 학술대회
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• pp.43-46
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• 2004

MPEG-21 is an on-progress project of the Moving Picture Expert Group (MPEG) that has been started in many independent parts such as part for standardizing the declaration of a digital item (MPEG-21 Part 2: Digital Item Declaration), right expression language (MPEG-21 Part S: Rights Expression Language), way to process the digital item (MPEG-21 Part 10: Digital Item Processing), etc. All this part is intended to form a framework to enable transparent and augmented use of multimedia resources across a wide range of networks and devices (1). In this paper, we show our research initiative to develop a web-based application that utilized many parts of MPEG-21 technology. The implemented concept uses a digital item and license providers in the server side while the MPEG-21 Conformant application is implemented as a plug-in application that will be downloaded to the user terminal when user accesses the webpage for the frist time. The result of this research shows that with some combination of MPEG-21 parts, we can develop an authorized multimedia delivery and consumption application.