• Title/Summary/Keyword: Digital Devices

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Web-based Controlled Delivery and Consumption of Multimedia in MPEG-21 Framework

  • Hendry Hendry;Cha Kyung-Ae;Park Keunsoo;Kim Munchurl
    • Proceedings of the Korean Society of Broadcast Engineers Conference
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    • 2004.11a
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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.

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A Technology-Strategy Integrated Digital Forensic Process Framework Considering Government ICT R&D Strategy and ICT Paradigm Shift (정부 ICT R&D 중장기전략과 ICT 패러다임 변화를 반영한 디지털 포렌식 표준정립을 위한 기술-정책적 통합프로세스 프레임워크)

  • Shin, Jun Woo
    • Journal of the Korea Institute of Information and Communication Engineering
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    • v.18 no.7
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    • pp.1495-1504
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    • 2014
  • Currently information related service such as internet banking, chatting, social network services are quite well smeared into our daily life. Moreover, a rapid growth of service using smart devices brought an importance of security in internet services and a research activation of digital forensic in a crime investigation. This paper presented a previous digital forensic research trend and based on this, suggested a technology-strategy integrated digital forensic process platform, taking a mid-long term government leading ICT R&D strategy and ICT paradigm shift into account.

A Study on the Application of Block Chain Ethereum Technology to Activate Digital Contents Trading as Sharing economy - data encryption and modify merkle tree-

  • Min, Youn-a;Baek, Yeong-Tae
    • Journal of the Korea Society of Computer and Information
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    • v.23 no.10
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    • pp.73-80
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    • 2018
  • The shared economy began with the concept of sharing the physical and intellectual assets of individuals with others. Nowadays, the concept of shared economy is becoming one of the industries as an enterprise type. Especially, with the development of the Internet and smart devices, various forms of shared economy have been developed in accordance with the need of sharing of individual income. Digital content is also a shareable commodity and it is seeking to utilize it as an item of shared economy. Accordingly, when digital contents are used as a shared economy, there are various possible threats -security threats that may arise in the course of transactions, potential for theft, alteration and hacking of contents. In this paper, we propose transaction method and content protection method using block chain-ethereum technology to reduce security threats and transparent transactions that can occur in digital contents transactions. Through the proposed method, the trust of the consumer and the supplier can be measured and the encryption can be performed considering the characteristics of the data to be traded. Through this paper, it is possible to increase the transparency of smart transaction of digital contents and to reduce the risk of content distortion, hacking, etc.

EMC design for TDX-1B subscriber Board (전전자 교환기 가입자회로의 EMI 대책 설계연구)

  • 윤현보;임계재
    • The Proceeding of the Korean Institute of Electromagnetic Engineering and Science
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    • v.6 no.1
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    • pp.48-65
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    • 1995
  • This paper deals with the analysis of the unintentional radiation from the TDX-1B subscriber Board. According to the demand of digital systems and developement of high speed switching devices, electro- magnetic noise intensity and it's bandwidth occupancy in spectrum are increasing and so there is a serious possibility causing the various EMI phenomena. More accurate radiation model was established by using the Finite Difference Time Domain (FDTD) analysis, and the EMI probabilistic analysis of the digital switching system was performed. For validating the proposed model and its calculated results, on-promises test was performed and compared with the calculated results. These results may be applicable to be used for EMI model in large digital system, and prediction of EMI effect from a large digital system, and the EMI control design when designing digital system to meet inter- national EMI regulation.

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Development of Forensic Marking technology for tracing multiple users (다중 불법콘텐츠 복제자 추적 기술 개발)

  • Kim, Jong-An;Kim, Jin-Han;Kim, Jong-Heum
    • 한국정보통신설비학회:학술대회논문집
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    • 2008.08a
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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.

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Virtual Lecture Contents for Digital Logic Circuit Using Multimedia (멀티미디어를 이용한 디지털 논리 회로 콘텐츠)

  • Lim, Dong-Kyun;Oh, Won-Geun
    • Journal of the Korea Institute of Information and Communication Engineering
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    • v.12 no.1
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    • pp.59-64
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    • 2008
  • In this paper, we developed an virtual lecture to study digital logic circuits. The contents is intended fer the students without or with little knowledge about electrics or electronics. For the beginners, the lecture contains the basic electronics and basic circuit theory as well as the degital logic circuits to be more practical lecture. And we developed the virtual circuit lab which uses real-like devices, circuits and interactive objects for the students to experience practical digital circuits. With the features described above, this contents would be useful for the beginners who want to studying digital logic circuits.

Detecting Digital Micromirror Device Malfunctions in High-throughput Maskless Lithography

  • Kang, Minwook;Kang, Dong Won;Hahn, Jae W.
    • Journal of the Optical Society of Korea
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    • v.17 no.6
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    • pp.513-517
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    • 2013
  • Recently, maskless lithography (ML) systems have become popular in digital manufacturing technologies. To achieve high-throughput manufacturing processes, digital micromirror devices (DMD) in ML systems must be driven to their operational limits, often in harsh conditions. We propose an instrument and algorithm to detect DMD malfunctions to ensure perfect mask image transfer to the photoresist in ML systems. DMD malfunctions are caused by either bad DMD pixels or data transfer errors. We detect bad DMD pixels with $20{\times}20$ pixel by white and black image tests. To analyze data transfer errors at high frame rates, we monitor changes in the frame rate of a target DMD pixel driven by the input data with a set frame rate of up to 28000 frames per second (fps). For our data transfer error detection method, we verified that there are no data transfer errors in the test by confirming the agreement between the input frame rate and the output frame rate within the measurement accuracy of 1 fps.

Trends and Future of Digital Personal Assistant (디지털 개인비서 동향과 미래)

  • Kwon, O.W.;Lee, K.Y.;Lee, Y.H.;Roh, Y.H.;Cho, M.S.;Huang, J.X.;Lim, S.J.;Choi, S.K.;Kim, Y.K.
    • Electronics and Telecommunications Trends
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    • v.36 no.1
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    • pp.1-11
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    • 2021
  • In this study, we introduce trends in and the future of digital personal assistants. Recently, digital personal assistants have begun to handle many tasks like humans by communicating with users in human language on smart devices such as smart phones, smart speakers, and smart cars. Their capabilities range from simple voice commands and chitchat to complex tasks such as device control, reservation, ordering, and scheduling. The digital personal assistants of the future will certainly speak like a person, have a person-like personality, see, hear, and analyze situations like a person, and become more human. Dialogue processing technology that makes them more human-like has developed into an end-to-end learning model based on deep neural networks in recent years. In addition, language models pre-trained from a large corpus make dialogue processing more natural and better understood. Advances in artificial intelligence such as dialogue processing technology will enable digital personal assistants to serve with more familiar and better performance in various areas.

Implant-assisted full denture using digital guide: a case report (무치악 환자에서 디지털 가이드를 이용한 임플란트 수복증례)

  • Kim, Wook Tae
    • Journal of Technologic Dentistry
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    • v.43 no.4
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    • pp.202-209
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    • 2021
  • By classifying temporary denture production for surgical guides, digital guide-based surgery, and final prosthesis production, the problems of each process were assessed in advance and the factors that could be improved were confirmed in this study. The manufacturing process of fusion dental prosthesis uses virtual programs and computed tomography images to manufacture devices using the latest technologies of computer-aided design/computer-aided manufacturing and three-dimensional printing, which enables implants to be placed in the desired location in advance. Moreover, implant placement is not dependent on the skill and condition of the dentist, and because it uses a computer system, it can always be performed at a constant and optimal position. This can reduce the remanufacturing rate compared with the general method, shorten the treatment period, and eliminate patient discomfort. Unlike the traditional method of using impression materials and plaster models, digital fusion dental prostheses would be evaluated as a technology for producing prosthesis through professional design technology and communication.

Planning of Various Storytelling Virtual Reality Game Contents for Brain Enhancement (두뇌증진을 위한 다양한 스토리텔링 가상현실 게임 콘텐츠 기획)

  • Jin, Hwa-su;Song, Eun-jee
    • Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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    • 2021.05a
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    • pp.323-325
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    • 2021
  • With the recent revitalization of virtual reality and game industries, digital therapeutics for medical purposes are emerging. Digital therapeutics refer to sports-based therapeutics such as virtual reality contents and games that are effective in preventing, managing, and treating diseases, not drugs. Through this study, we plan and develop contents for healing and brain enhancement using virtual reality technology as a therapeutic digital therapy. Through this, it can help to improve the brain of children who are dependent on electronic devices in the digital age and rarely use their brains.

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