• 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.

• Proceedings of the Korea Information Processing Society Conference
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• 2003.11a
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• pp.431-434
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• 2003

과거 임베디드 시스템은 산업용 같은 특수한 경우와 여러 전자 제품에서 눈에 뛰지 않는 형태로 사용이 되어 왔지만 최근 들어 정보통신 분야가 발전하고 가격 대 성능비가 우수한 Microcontroller 와 CPU 들이 등장하면서 더욱 더 각광을 받기 시작했다. 이들의 개발환경은 C 언어와 어셈블리어가 주를 차지하고 있는데 개발상의 많은 장점 때문에 C 언어를 선택하여 사용하고 있지만 target machine 의 C 컴파일러가 전부 제공되지 않고 일부 machine 만 제공되고 있기 때문에 C 언어의 사용은 아직 제한적이다. 이에 본 논문에서는 Retargetable Compiler 인 LCC 를 이용하여 임베디드용 machine 에 대해 retargeting 이 가능하도록 LCC 를 개선시키고자 한다.

• Journal of the Korean Society for Precision Engineering
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• v.19 no.12
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• pp.179-184
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• 2002

In this study, we developed a portable device which can monitor and analyze vibration signals from machines. This system consists a PDA loading the program for vibration analysis and A/D board for vibration acquisition. A PDA is smaller than the palm of the hand, but it has a powerful computing ability as much as an IBM compatible PC with a Pentium 100MHz CPU. The A/D board developed in this study supports LAN interface using TCP/IP communication protocol. The application program for vibration analysis includes signal processing module, fault diagnosis module, data store module, and plot display module. MS visual embedded C＋＋ 3.0 was used to developed the program.

• Proceedings of the KIEE Conference
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• 2005.10b
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• pp.210-212
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• 2005

The personal video recorder is a consumer electronics device that records television shows to a hard disk in digital format. In this paper, we propose an implementation method of personal video recorder for digital TV. The proposed personal video recorder includes cpu and system control modules, graphics and display module, audio DSP module, digital I/O module, NIM module, graphic software library, and embedded software modules for providing a lot of PVR functions such as live or reserved recordings, browsing of recorded content list, trick play and time shifting. Especially, combining trick play with time shifting makes much more convenient functions such as pausing live TV, instant replay of interesting scenes, and skipping advertising.

• Proceedings of the IEEK Conference
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• 2008.06a
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• pp.143-144
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• 2008

By using Ez-RoboMaster which is developed in EASYTECH, we implement an intelligent robot system. The Ez-RoboMaster is developed based on AVR Atmega128, and the emdedded system contains 5 ports for several sensors and actuators. And we develop integrated development environment(IDE), Ez-CPU3.0 for easy application of Ez-RoboMaster. In this paper, we introduce the effectiveness of Ez-RoboMaster for educational platforms of intelligent robot systems at college and university.

• 한국정보통신설비학회:학술대회논문집
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• 2006.08a
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• pp.141-144
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• 2006

The personal digital recorder is a consumer electronics device that records television shows to a hard disk in digital format. In this paper, we propose an implementation method of personal digital recorder for HDTV. The proposed personal recorder includes CPU and system control modules, graphics and display module, audio DSP module, digital I/O module, NIM module, graphic software library, and embedded software modules for providing a lot of personal digital recorder functions such as live or reserved recordings, browsing of recorder content list, trick lay and time shifting. Especially, combining trick play with time shifting makes much more convenient functions such as pausing live TV, instant replay of interesting scenes, and skipping advertising.

• Proceedings of the IEEK Conference
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• 2006.06a
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• pp.913-914
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• 2006

This paper proposes a flexible IED platform which is implemented with a network processor and a DSP. DSP algorithms are downloaded through the embedded Linux based network processor remotely from ethernet. This architecture gives the best flexibility to adaptively accommodate the various algorithms needed in the IED environment. The developed IED platform can simultaneously measure data of the maximum of forty channels. The developed IED platform shows the successful operation, which measures and transfers the 8 channels data of 16bit samples sampled at 3.84kHz per each channel. The detailed performance analysis of the developed IED platform shows the about 10% processing load of CPU running at 533MHz.

• IEIE Transactions on Smart Processing and Computing
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• v.4 no.2
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• pp.83-88
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• 2015

Core-A is 32-bit synthesizable processor core with a unique instruction set architecture (ISA). In this paper, the Core-A ISA is introduced with discussion of useful features and the development environment, including the software tool chain and hardware on-chip debugger. Core-A is described using Verilog-HDL and can be customized for a given application and synthesized for an application-specific integrated circuit or field-programmable gate array target. Also, the GNU Compiler Collection has been ported to support Core-A, and various predesigned platforms are well equipped with the established design flow to speed up the hardware/software co-design for a Core-A-based system.

• Electronics and Telecommunications Trends
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• v.18 no.2 s.80
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• pp.1-10
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• 2003

자바 애플리케이션의 이식성을 보장해주는 ‘WORA’ 모델을 실현하기 위해서 바이트코드에 기반한 자바는 바이트코드 인터프리터를 포함하는 구조적 한계로 인해 성능상의 문제를 갖고 있다. 최근에 서버에서 정보가전에 이르기까지 자바 기술을 확산시키기 위해 자바는 J2EE, J2SE, J2ME의 3영역으로 나누어지고 셀룰러폰, PDA 등 스마트 핸드헬드 기기에는 J2ME 환경이 제공되고 있다. 데스크톱 PC의 고성능화와 다양한 가속 기술의 개발로 인해 성능 문제가 보완되어 수많은 자바 애플리케이션이 데스크톱 PC에서 개발되어 왔으나 CPU, 메모리, 전력 등 자원 제약적 특성을 갖는 임베디드 시스템은 데스크톱 PC에 적용된 자바의 성능 향상 기술을 적용하기에 부적절하여 이에 적합한 새로운 자바 가속 기술이 개발되고있다. 본 고에서는 임베디드 시스템에서 자바의 성능 향상을 위해 개발된 자바 가속 기술을 소프트웨어및 하드웨어 측면에서 살펴보고 대표적인 상용 기술에 대해 고찰하였다.

• Proceedings of the Korean Information Science Society Conference
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• 2005.07a
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• pp.733-735
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• 2005

현재 네트워크 기술은 기가비트급의 속도를 넘어 급속히 발전하고 있다. 이러한 고속 네트워크상에서 TCP/IP를 사용할 경우, 호스트 CPU에서 TCP/IP 프로토콜을 처리하는데 많은 부하가 발생한다. 이러한 문제를 해결하기 위해 최근 네트워크 어댑터에서 TCP/IP를 처리하는 TCP/IP Offload Engine(TOE)에 대한 연구가 활발히 진행되고 있다. 본 논문에서는 임베디드 시스템과 리눅스를 사용하여 TOE를 구현하였으며, 그 동작 메커니즘을 보인다. 실험 결과 및 분석을 통해 임베디드 시스템에 리눅스를 활용한 TOE는 상당한 오버헤드를 가지고 있는 것으로 나타났으며, 이를 바탕으로 추후 기가비트 환경에 맞는 TOE 구현시 이러한 오버헤드를 극복할 수 있는 방안을 제안한다.