• International Journal of Internet, Broadcasting and Communication
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• 제7권1호
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• pp.10-14
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• 2015

Video Content owners seek to squeeze the maximum amount of revenue from their assets via distribution into more territories. Digital Cinema Package(DCP), trusted solution to distribute protected content to theaters, caters to relatively small user base, which limits revenue. With the growth of the Internet & other digital media, the economics of media content has changed dramatically. Security remains main concern to deliver content to millions of consumers using intelligent digital display devices like Tablets, Smartphones, Smart TVs, Desktop & Laptop. By making the video content available to this segment securely, content owners will benefit from increased revenue. Through this paper we propose Open Source HomeDCP model to distribute the content to home users for offline viewing. We propose to include other open source CODEC than JPEG2000/MPEG2, which are specifically designed for theatrical performance. Final image size will be further reduced considering the display device resolution where video will be finally played. Key Delivery Message(KDM) system to be altered to suit new devices. This will be a big boost to Content Economy as content owners would be able to distribute the content securely to the wider audience & ensure more revenue.

• 한국정보통신학회:학술대회논문집
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• 한국해양정보통신학회 2005년도 춘계종합학술대회
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• pp.1094-1097
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• 2005

저작권의 보호 및 관리는 멀티미디어 컨텐츠의 디지털화에 매우 중요한 선결 과제로 이슈화되고 있다. 본 논문에서는 현재의 국내외 미디어 서비스 현황을 조사 분석하고, 저작권 및 디지털 컨텐츠 보호를 위한 기술인 IPMP(Intellectual Property Management and Protection), DMP(Digital Media Project), ENTHRONE(End-to-end Qos through Integrated Management of Content, Networks and Terminals), DRM(Digital Rights Management)의 기술개발 현황을 조사 분석한다. 표준안이 마련되지 않은 현 시점에서 여러 업체 및 연구기관에서는 독자적인 기술 및 서비스를 개발하고 있으며, 솔루션을 연구개발하고 표준안을 마련하기 위해 세계 각국의 연구기관들이 공동으로 프로젝트를 진행하고 있다.

• 한국정보통신설비학회:학술대회논문집
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• 한국정보통신설비학회 2008년도 정보통신설비 학술대회
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• pp.102-106
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• 2008

Forensic Marking is the technology that enables the service providers (SP) to identify the illegal digital contents distributors by first inserting markings (data indicating the user information and playback time) in realtime into the digital contents at time of playback of digital contents, and then later by extracting inserted markings from the contents which are illegally captured from the multimedia device such as IPTV STBs and distributed over the Internet. Digital Rights Management (DRM), which is a very popular content protection technology, has the security hole that can be vulnerable because the encrypted digital contents are transformed into their original plaintext forms after the decrypting process on the STBs. Therefore Forensic Marking (FM) has now become a companion content protection solution to DRM. This article describes a new way of tracking up to 4 illegal content users in FM implementation using the blue-difference chroma component of YCbCr color space. This FM technology has many advantages like fast processing time and easy portability to STB devices compared to that of the traditional watermarking processing in the frequency domain.

• 융합보안논문지
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• 제18권4호
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• pp.35-43
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• 2018

현재 디지털 증거는 증거 채택에 있어 자유심증주의를 택하는 바, 채택의 기준이 명확하지 못하며, 분산처리 기법으로 디지털 증거의 분석시간을 단축시킬 수 있으나 암호기술의 발전 등으로 영장청구 제한시간인 48시간에 적합하지 못한다는데 문제점이 있다. 본 논문에서는 민/형사 소송절차에서의 증거능력과 증명력을 판례를 중심으로 분석하여, 자유심증주의를 대체할 객관적이고 세부적인 채택기준의 필요성에 대해 논하고자 한다. 또한, 포렌식 관점에서의 영장 청구 제한시간에 대한 문제점과 이에 대한 개선안으로 디지털 증거분석 사전신청제를 제시하고자 한다.

• 정보처리학회논문지C
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• 제15C권2호
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• pp.125-132
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• 2008

인터넷 기술의 발달에 따라 온라인 서비스를 이용하기 위해 개인이 관리해야 할 아이디의 수가 증가하였고, 사용자의 아이디와 패스워드를 안전하고 편리하게 관리할 수 있는 아이디/패스워드 통합 관리 제품이 개발되어 사용되고 있다. 하지만 이러한 제품에서 관리자 패스워드가 노출되면 사용자의 모든 정보가 노출될 수 있는 위험이 있다. 따라서 현재 상용 제품의 취약성 분석을 통해 보안요구사항을 도출하고, 안전한 아이디/패스워드 통합 관리 제품 개발의 지침으로 용될 평가기준이 필요하다. 본 논문에서는 도출된 보안요구사항을 바탕으로, 안전한 아이디/패스워드 통합 관리 제품을 위한 평가 기준을 제안한다.

• 대한치과의사협회지
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• 제50권3호
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• pp.140-147
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• 2012

Recently, the digital solution of fabricating removable prosthesis by applying haptic input device, electronic surveying, and rapid prototyping was introduced. This review article covers the concept of electronic surveying, computer-aided denture framework designing procedure, discussions after several digital denture cases, directions of future development, such as digital tooth arrangement and RP flasking.

• 디지털산업정보학회논문지
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• 제12권3호
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• pp.1-9
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• 2016

The current meaning of "Big Data" refers to all the techniques for value eduction and actionable analytics as well management tools. Particularly, with the advances of wireless sensor networks, they yield diverse patterns of digital records. The records are mostly semi-structured and unstructured data which are usually beyond of capabilities of the management tools. Such data are rapidly growing due to their complex data structures. The complex type effectively supports data exchangeability and heterogeneity and that is the main reason their volumes are getting bigger in the sensor networks. However, there are many errors and problems in applications because the managing solutions for the complex data model are rarely presented in current big data environments. To solve such problems and show our differentiation, we aim to provide the solution of actionable analytics and semantic reusability in the sensor web based streaming big data with new data structure, and to empower the competitiveness.

• 한국전기전자재료학회논문지
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• 제15권6호
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• pp.529-534
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• 2002

Recently, As the higher frequency in clock of digital system being demanded and the density of circuits gets high for purpose of making light and minimizing system, the study for solution of digital signal distortion being interested. In this paper, the distortion of square pulse caused by dispersion as it propagates along a single microstrip line and crosstalk between lines on the Multi-Transmission Lines (MTL) is investigated. The dispersion and crosstalk of pulse signals is analyzed regarding to the structure of transmission line such as relative permittivity, substrate height, strip width of the microstrip line and pulse width of signal pulse.

• 대한의용생체공학회:의공학회지
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• 제22권3호
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• pp.285-291
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• 2001

In this paper, we designed two preprocessing adaptive filter - high pass filter and notch filter - using FPGA. For minimizing the calculation load of multi-channel and high-resolution ECG system, we utilize FPGA rather than digital signal processing chip. To implement the designed filters in FPGA, we utilize FPGA design tool(Altera corporation, MAX-PLUS II) and CSE database as test data. In order to evaluate the performance in terms of processing time, we compared the designed filters with the digital filters implemented by ADSP21061(Analog Devices). As a result, the filters implemented by FPGA showed better performance than the filters based on ADSP21061. As a consequence of examination, we conclude that FPGA is a useful solution in multi-channel and high-resolution signal processing.

• 한국수학교육학회지시리즈D:수학교육연구
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• 제11권2호
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• pp.143-151
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• 2007

Nowadays there are practically no mathematical courses in which Computer Algebra Systems (CAS) programs, such as MATHEMATlCA, Maple, and TI-89/92, are not used to some extent. However, generally the usage of these programs is reduced to illustration of computing processes: calculation of integrals, differentiation, solution of various equations, etc. This is obtained by usage of standard command of type: Solve [...] in MATHEMATICA. At the same time the main difficulties arise at teaching nonconventional mathematical courses such as coding theory, discrete mathematics, cryptography, Scientific computing, which are gaining the increasing popularity now. Now it is impossible to imagine a modern engineer not having basic knowledge in discrete mathematics, Cryptography, coding theory. Digital processing of signals (digital sound, digital TV) has been introduced in our lives.