• Title/Summary/Keyword: Digital Architecture

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The Architecture and Its Function of Tool server in MPEG-21 Multimedia Framework (MPEG-21 멀티미디어 프레임워크에서 툴 서버의 구조 및 기능)

  • 김광용;홍진우;김진웅
    • Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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    • 2003.10a
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    • pp.292-295
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    • 2003
  • This paper presents the architecture and its function of Tool server. MPEG-21 will enable all-electronic creation, delivery and trade of digital multimedia content and transparent usage of various content types on network device. Therefore, we can provide access to information and services from almost anywhere at anytime with various terminals and networks. In order to support multimedia delivery chain that contains content creation, production, delivery and consumption, we need some elements to identify, describe, manage and protect the contents. Thus, we define Digital Item Processing(DIP), Digital Item Adaptation(DIA) server and Tool server as primary objects of MPEG-21 multimedia framework. DIP provides a function which creates and consumes Digital Item(DI) as a kind of a digital object by user. DIA server adapts the original DI to the usage environment description sent from the terminal and transmits the adapted DI to the terminal. Tool sewer searches for a tool requested from DIP or DIA and downloads the best tool to DIP or DIA server. In this paper, we present how Tool server is organized and is used among 2 primary objects. The paper is structured as following: Section 1 briefly describes why MPEG-21 is needed and what MPEG-21 wants. We see the basic architecture of tool server and its functionality by each module in section 2. Section 3 explains a scenario that tool server transmits tool to DIP or DIA. The paper concludes in section 4.

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Protection of MPEG-2 Multicast Streaming in an IP Set-Top Box Environment

  • Hwang, Seong-Oun;Kim, Jeong-Hyon;Nam, Do-Won;Yoon, Ki-Song
    • ETRI Journal
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    • v.27 no.5
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    • pp.595-607
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    • 2005
  • The widespread use of the Internet has led to the problem of intellectual property and copyright infringement. Digital rights management (DRM) technologies have been developed to protect digital content items. Digital content can be classified into static content (for example, text or media files) and dynamic content (for example, VOD or multicast streams). This paper deals with the protection of a multicast stream on set-top boxes connected to an IP network. In this paper, we examine the following design and architectural issues to be considered when applying DRM functions to multicast streaming service environments: transparent streaming service and large-scale user environments. To address the transparency issue, we introduce a 'selective encryption scheme'. To address the second issue, a 'key packet insertion scheme' and 'hierarchical key management scheme' are introduced. Based on the above design and architecture, we developed a prototype of a multicasting DRM system. The analysis of our implementation shows that it supports transparent and scalable DRM multicasting service in a large-scale user environment.

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Visual Interface Trend of Digital Media Expressed on Contemporary Interior Design (현대 실내디자인에 표현된 디지털미디어의 비주얼 인터페이스 경향에 관한 연구)

  • Eun, Ee-Sun;Chung, Mi-Ryum
    • Korean Institute of Interior Design Journal
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    • v.15 no.5 s.58
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    • pp.104-111
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    • 2006
  • Digital media changed not only our lifestyle and sense of value but also art and space design, and development of technology will accelerate the alteration. It provided limitless possibility and inspiration to art, architecture and design. In this 'image' era, media communicate with us mostly in visual method, which gets to he realized by visual interface. The purpose of this study is to analyze the tendency of visual interface of contemporary interior design cases in the standpoint of digital media characteristics and suggest directions for future space design. The characteristics of digital media and interface are defined, and how the concept unfolded in art, design is also discussed. In interior design, the concepts come out as various types of visual interface, showing the characteristics of composition of material and immaterial, interaction between visual information and space users and among users, realization of cyberspace and simultaneous coexistence of multiple space-time multi-layer.

A Realization of Digital Convergence Platform based on MPEG-21 Multimedia Framework (MPEG-21 멀티미디어 프레임워크에 기반한 디지털 컨버젼스 플랫폼 구현에 관한 연구)

  • Oh, Hwa-Yong;Lee, Eun-Seo;Kim, Dong-Hwan;Chang, Tae-Gyu
    • Proceedings of the KIEE Conference
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    • 2005.05a
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    • pp.227-229
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    • 2005
  • This paper proposes a method of implementation of digital convergence platform(DCP) which enable the service of broadcasting, communication, multimedia and home automation. Also digital convergence platform based on MPEG-21 multimedia framework can be a model to provide a distributed electronic commerce environment of multimedia and to manage of it. Platform hardware is implemented using a general purpose CPU and high performance digital signal processor and has peripheral units for network and multi I/O. It is able to run applications of multimedia which has variable formats on DSP. In addition, a personal transaction of multimedia packaged with MPEG-21 multimedia framework is provided on digital convergence platform. Like this, digital convergence platform bring up a new architecture of multimedia systems using a new generation network.

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A Phase-Locked Loop with Embedded Analog-to-Digital Converter for Digital Control

  • Cha, Soo-Ho;Jeong, Chun-Seok;Yoo, Chang-Sik
    • ETRI Journal
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    • v.29 no.4
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    • pp.463-469
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    • 2007
  • A phase-locked loop (PLL) is described which is operable from 0.4 GHz to 1.2 GHz. The PLL has basically the same architecture as the conventional analog PLL except the locking information is stored as digital code. An analog-to-digital converter is embedded in the PLL, converting the analog loop filter output to digital code. Because the locking information is stored as digital code, the PLL can be turned off during power-down mode while avoiding long wake-up time. The PLL implemented in a 0.18 ${\mu}m$ CMOS process occupies 0.35 $mm^2$ active area. From a 1.8 V supply, it consumes 59 mW and 984 ${\mu}W$ during the normal and power-down modes, respectively. The measured rms jitter of the output clock is 16.8 ps at 1.2 GHz.

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Hardware Implementation of Time Skew Calibration Block for Time Interleaved ADC (TI ADC를 위한 시간 왜곡 교정 블록의 하드웨어 구현)

  • Khan, Sadeque Reza;Choi, Goangseog
    • Journal of Korea Society of Digital Industry and Information Management
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    • v.13 no.3
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    • pp.35-42
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    • 2017
  • This paper presents hardware implementation of background timing-skew calibration technique for time-interleaved analog-to-digital converters (TI ADCs). The timing skew between any two adjacent analog-digital (A/D) channels is detected by using pure digital Finite Impulse Response (FIR) delay filter. This paper includes hardware architecture of the system, main units and small sub-blocks along with control logic circuits. Moreover, timing diagrams of logic simulations using ModelSim are provided and discussed for further understanding about simulations. Simulation process in MATLAB and Verilog is also included and provided with basic settings need to be done. For hardware implementation it not practical to work with all samples. Hence, the simulation is conducted on 512 TI ADC output samples which are stored in the buffer simultaneously and the correction arithmetic is done on those samples according to the time skew algorithm. Through the simulated results, we verified the implemented hardware is working well.

A Digital Library Prototype - Digital Repository and Diverse Collections (디지털도서관 프로토타입의 구축 -디지털 리포지토리와 컬렉션을 중심으로)

  • 최원태
    • Proceedings of the Korea Database Society Conference
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    • 1998.09a
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    • pp.383-394
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    • 1998
  • This article is an overview of the digital library project, indicating what roles Korea's diverse digital collections may play. Our digital library prototype has simple architecture, consisting of digital repositories, filters, indexing and searching, and clients. Digital repositories include various types of materials and databases. The role of filters is to recognize a format of a document collection and mark the structural components of each of its documents, We are using a database management system (ORACLE and ConText) supporting user-defined functions and access methods that allows us to easily incorporate new object analysis, structuring, and indexing technology into a repository.

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A Study on Environment and Perception of CAD by Undergraduate Students in the Dept. of Architecture - Case study on Undergraduate Students - (대학(大學) 건축학과(建築學科) 재학생(在學生)의 CAD 환경(環境) 및 인식(認識)에 관한 연구(硏究) - 사례대학의 재학생을 대상으로 -)

  • Yoo, Chang-Geun;Park, Sung-Ha
    • Journal of The Korean Digital Architecture Interior Association
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    • v.1 no.1
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    • pp.24-30
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    • 2001
  • This study conducts a questionnaire with undergraduate students in the Dept. of Architecture who will lead the architectural field in future, examines environment and perception of CAD in their home and universities and aims at supplying the data required for setting CAD educational index and building its use environment, and it could obtain the following results. Individual CAD environment of undergraduate students in the Dept. of Architecture reach a considerable level in hardware part, but they don't have the same level in software part as the hardware and use illegal copy programs. It is shown that they spend their time in using CAD for five to eight hours a week and its main purposes are to perform a project related to architectural design or make report requiring drawing. Major places using CAD are CAD room in university or public PC room equipped with CAD compared to their own houses and most of them have a negative recognition of the convenience of its use. Their satisfaction with CAD use is considerably high and when they submitted their assignments of architectural design project by means of CAD, they had a positive evaluation from their professors and they have such hopes that 'Korean Support Strengthening', 'lowering price through version supply for students' and 'diversification of design symbol' in CAD S/W, and especially, most of respondents have an intention to purchase the original goods when version only for students will be marketed in future. Accordingly, for a qualitative improvement of CAD environment for undergraduate students in the Dept. of Architecture, universities must be equipped with the various types of CAD S/W and Applications and students' opportunity to access them should be increased. In addition, a method which can enhance using convenience of CAD room and PC room is required and CAD related S/W developers must market the version for students which consider the reality of undergraduates in Korea properly with an appropriate price level in order to settle a sound S/W culture.

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An Effective Authentication in Mobile Ad Hoc Networks (Mobile Ad Hoc Networks에서 효과적인 인증서비스)

  • Kim Yoon-Ho
    • The Journal of Society for e-Business Studies
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    • v.10 no.1
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    • pp.121-134
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    • 2005
  • The MANET has many problems in security despite of its many advantages such as supporting the mobility of nodes, independence of the fixed infrastructure, and quick network establishment. In particular, in establishing security, the traditional certification service has many difficult problems in applying to the MANET because of its safety, expandability, and availability. In this paper, a secure and effective distributed certification service method was proposed using the Secret Sharing scheme and the Threshold Digital Signature scheme in providing certification services in the MANET. In the proposed distributed certification service, certain nodes of relatively high safety among the mobile nodes consisting of the MANET, were set as privileged nodes, from which the process of issuing a certification started. The proposed scheme solved problem that the whole network security would be damaged by the intrusion to one node in the Centralized Architecture and the Hierarchical Architecture. And it decreased the risk of the exposure of the personal keys also in the Fully Distributed Architecture as the number of the nodes containing the partial confidential information of personal keys decreased. By the network simulation, the features and availability of the proposed scheme was evaluated and the relation between the system parameters was analyzed.

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A Study on Metamorphic analysis and the expressive system in Contempory Architecture (현대 건축의 메타모포시스적 해석과 표현에 관한 연구)

  • Byun, Dae-Joong
    • Korean Institute of Interior Design Journal
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    • v.20 no.1
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    • pp.14-23
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    • 2011
  • The purpose of this study is to analyse the inclinations and expressions in contemporary architecture. Specially, we call this tendency and architectural movements as architectural metamorphosis. Metamorphosis in architecture present the core of the change of Forms and spirits in a change of outward shape and terrestrial identity. As in Ovid's extended dramatic poem of change and transformation, Metamorphoses, all Souls are deathless, and migrates from one form to another. Like these stories in Metamorphoses, Ovid tells the soul never dies, but leaps one form to anther, and can take any shape. So the architectural form, transformation and deformation in contemporary architecture means architectural sensations and cognitions can even approach the soul of form and shape under the transformation. The expressions and design strategies of metamorphosis in comtemporary architecture reveal continuous and sequential formations of space, linear structure with force and vector, rhythmical wavement and folding surface, lively wiggly flows of volumns and objects, and so on. Such qualities came from the periodical needs; separation of structure and surface, poly-surfacial movement, poly-sensual expression and experience, dematerialization and the dematerialized space, formless of non-formal architecture, digital architecture. Architecture of Metamorphosis is the ways and the needs of our period to overcome the static limits prohibits the liberal thoughts, to find the ways toward the opportunities and diversities and to unlock the imaginaire of the contemporary architecture.