• Proceedings of the Korean Society of Broadcast Engineers Conference
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• 2002.11a
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• pp.151-156
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• 2002

본 논문에서는 MPEG-21 프레임워크 기반 하에 방송용 멀티미디어 컨텐츠를 디지털아이템 선언에 의해 디지털 아이템을 생성하고 이를 소비하기 위한 시스템에 대해 제안하였다. 제안된 시스템은 디지털 아이템을 XML 문서로 생성하고, 이 생성된 디지털 아이템을 소비하기 위한 관련 Parser 모듈들, 브라우저 및 리소스와 관련 데이터 DB로 구성되어 있다. 제안된 시스템을 방송용 컨텐츠에 대해 적용하였으며, 디지털 아이템의 기술을 위해 국제 표준 규격인 PEG-7 MDS 기술자를 이용 적용하였다. 예상 가능한 사용자의 여러 환경 조건을 가상하여 다양한 미디어 리소스를 적용하였다.

• ETRI Journal
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• v.28 no.5
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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.

• Journal of Korea Society of Digital Industry and Information Management
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• v.4 no.3
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• pp.33-43
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• 2008

As internet is spreaded widely, the number of cyber terror using hacking and virus is increased. Also the hacking to the internet shopping mall go on increasing. If the large shopping mall is attacked by the hacker, a number of user's information are exposed to the hacker. The private information as like a resident registration number, user's real name, the date of user's birth, the mobile phone number, the office phone number / address, the home phone number / address and so on include the information. These information are used in the phishing e-mails / call and spam. And them are selling and buying maliciously. The large internet shopping mall 'auction' was hacked in April, 2008. After the incident, this paper suggested a countermeasures on the hacking for the internet shopping mall. The technical item and political item are included among the countermeasures. The countermeasures can protect the hacking not only the internet shopping mall but also the web sites basically.

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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• 2006.05a
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• pp.149-152
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• 2006

The usage increase of digital contents required solution for protection technology and interoperability of system. MPEG proposed MPEG-21 Multimedia Frameworks. MPEG-21 IPMP is standard that provides the means to enable digital item and rights information to be persistently managed and protected across networks and devices. In this paper, MPEG-21 IPMP based system to protect digital contents designed by four structures of license server, production server, consumption server, tool sewer. License sewer create rights information document using the XML-based REL about multimedia contents of users. Production server makes a digital item by packaging multimedia resource and metadata, which is combined by REL information and IPMP information of multimedia resource. Consumption server takes care of the functions of players that use digital item, and tool server was implement to transmit for missing tool that night occur in all procedures.

• Journal of the Korea Society of Computer and Information
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• v.11 no.1 s.39
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• pp.251-258
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• 2006

When producing a wireless web contents by using wire web contents for PC environment, we should consider how to represent lots of information being suitable with PC environment to wireless devices having narrow performance. Therefore, we propose mobile page editor for manager to select and modify specific contents with the existing wire web page. Also, we try to define an intermediate language based on DID(Digital Item Declaration) of MPEG-21 multimedia framework which defines source of converting information and wireless web contents generating at mobile editor in considering real time service problem when transcoding multimedia information in a web server into wireless device having low resolution, narrow performance of media process, memory, and so on.

• Journal of the Korea Society of Computer and Information
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• v.12 no.1 s.45
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• pp.253-260
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• 2007

A multimedia converter is used to create media suitable for own environment. If the data complying with own demands can not be created, it may accompany with a problem that has to convert the data with another transcoder. In addition, conventional converters do not consider source QoS and target QoS sufficiently, meaning that users should have a significant knowledge base about various media in order to obtain desired results. These problems become limits on the UMA(Universal Multimedia Access) environment. In this paper, we create a suitable transcoding path before performing the Digital Item conversion in consideration of source QoS and target QoS. The created transcoding path performs the adaptive transcoding using unit exchanges featuring connectivity. The consideration of QoS allows users to use the multimedia easily. Since the proposed model, in addition, use the unit transcoder, it provides a excellent adaptive capability for new QoS.

• KSII Transactions on Internet and Information Systems (TIIS)
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• v.17 no.3
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• pp.938-957
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• 2023

The limited computing power of sensor nodes in wireless sensor networks (WSNs) and data tampering during wireless transmission are two important issues. In this paper, we propose a scheme for independent individual authentication of WSNs data based on digital watermarking technology. Digital watermarking suits well for WSNs, owing to its lower computational cost. The proposed scheme uses independent individual to generate a digital watermark and embeds the watermark in current data item. Moreover, a sink node extracts the watermark in single data and compares it with the generated watermark, thereby achieving integrity verification of data. Inherently, individual validation differs from the grouping-level validation, and avoids the lack of grouping robustness. The improved performance of individual integrity verification based on proposed scheme is validated through experimental analysis. Lastly, compared to other state-of-the-art schemes, our proposed scheme significantly reduces the false negative rate by an average of 5%, the false positive rate by an average of 80% of data verification, and increases the correct verification rate by 50% on average.

• Proceedings of the Korean Operations and Management Science Society Conference
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• 2004.10a
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• pp.285-288
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• 2004

인터넷의 확산과 IT의 혁신으로 인하여 Digital Item(이하 DI)의 종류와 양은 기하급수적으로 증가하고 있으며 DI를 실행시키는 application 역시 양적인 측면이 증가하고 있다. DI와 관련된 이해관계자인 제작자, 저작권자, 공급자, 최종 사용자간에는 저작권 관련 문제들이 발생하고 있으며 이를 위한 표준화 활동 또한 활발히 진행되고 있으며 본 논문은 표준화 제정에 관한 MPEG 표준기구의 활동을 이해하고 최근 진행되고 있는 MPEG-21 Part4 IPMP 표준화 논의에 최종적으로 도출될 결과물들을 예상하여 그 수준을 평가할 수 있는 상위참조모델을 제시한다.

• Journal of Information Technology Services
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• v.2 no.1
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• pp.145-156
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• 2003

This paper presents and analyzes urban planning process to be adopted to create ubiquitous space in city environment, using City of Seoul's Digital Media Street Project as a case study. The Digital Media Street will become the main pedestrian thoroughfare in the Digital Media City (DMC) in Sangam area, planned to become the world's first ubiquitous environment in full urban scale. Ubiquitous space is reinterpreted from an urban planning perspective, and a new approach to planning such a space is introduced, including strategies to couple technology, space, and human activities. Methodology, role of different actors, planning process, and institutional arrangement are examined in turn, and this yields further agenda for improvements that can be made in planning ubiquitous spaces in the future.

• Journal of Digital Convergence
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• v.4 no.2
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• pp.97-108
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• 2006

The purpose of this study is to generate a proper regulation improvement direction of the public If project contract law through the current four contract methods and three methods of the awarding party of a contract method. The research method for this paper is derived from the written materials of the present public IT project contract law. Two problems have been processed in order to produce the results: the current contract methods and the awarding party of a contract method. The current contract methods consist of a competition contract, a private contract, and a supply methodology contract, The methods of the awarding party of a contract display a qualified evaluation regulation, the 2nd step competition bid, a standard cost separation tender, and a contract by a negotiation. The results exhibit that the general competition contract consists of four improvement items. The contract by a negotiation contains five improvement items. The group private contract has one improvement item. And the private contract includes one improvement item. These results implicate that the current public IT project contract law demands better improvement work for the ubiquitous Korea.