• Title/Summary/Keyword: 합성 알고리즘

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An Active Network Execution Environment for on Demand Customization of Communication Protocols and Services (맞춤형 통신 프로토콜과 서비스를 위한 액티브 네트워크 실행환경)

  • Lee Hwa Young;Kang Bo-young;Lim Kyungshik
    • The KIPS Transactions:PartC
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    • v.11C no.7 s.96
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    • pp.937-950
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    • 2004
  • In this paper, we present the design and implementation of new execution environment named Customizable Architecture for Flexible Execution Environment(CAFEs) that supports the mechanism of protocol customization and service referencing. We introduce a new concept as micro protocols and active services to enhance software reusability. Micro protocol represents a specific algorithm or functionality of existing network protocol and the active service is in charge of binding legacy application and releasing the active network oriented services. The pro-posed active network execution environment is made up of three parts, virtual network system, protocol and service manager, event engine. First, the virtual network system is used to connect each active nodes using virtual network channels which are based on multiple existing protocol layers. Second, the protocol and service manager is responsible for composing micro protocols and active services to develop new network proto-col and service easily. Finally, the event engine is used to detect the automatic transition of system components using event delegation model. To verify the CAFTs, we have an experiment about the delivery of web contents which are suitable for the user's terminals in the wireless Internet environment. As a result. we are able to obtain the availability of developed execution environment.

'EVE-SoundTM' Toolkit for Interactive Sound in Virtual Environment (가상환경의 인터랙티브 사운드를 위한 'EVE-SoundTM' 툴킷)

  • Nam, Yang-Hee;Sung, Suk-Jeong
    • The KIPS Transactions:PartB
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    • v.14B no.4
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    • pp.273-280
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    • 2007
  • This paper presents a new 3D sound toolkit called $EVE-Sound^{TM}$ that consists of pre-processing tool for environment simplification preserving sound effect and 3D sound API for real-time rendering. It is designed so that it can allow users to interact with complex 3D virtual environments by audio-visual modalities. $EVE-Sound^{TM}$ toolkit would serve two different types of users: high-level programmers who need an easy-to-use sound API for developing realistic 3D audio-visually rendered applications, and the researchers in 3D sound field who need to experiment with or develop new algorithms while not wanting to re-write all the required code from scratch. An interactive virtual environment application is created with the sound engine constructed using $EVE-Sound^{TM}$ toolkit, and it shows the real-time audio-visual rendering performance and the applicability of proposed $EVE-Sound^{TM}$ for building interactive applications with complex 3D environments.

Design of a Variable Shortened and Punctured RS Decoder (단축 및 펑처링 기반의 가변형 RS 복호기 설계)

  • Song Moon-Kyou;Kong Min-Han;Lim Myoung-Seob
    • The Journal of Korean Institute of Communications and Information Sciences
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    • v.31 no.8C
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    • pp.763-770
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    • 2006
  • In this paper, a variable Reed-Solomon(RS) decoder with erasure decoding functionality is designed based on the modified Euclid's algorithm(MEA). The variability of the decoder is implemented through shortening and puncturing based on the RS(124, 108, 8) code, other than the primitive RS(255, 239, 8) code. This leads to shortening the decoding latency. The decoder performs 4-step pipelined operation, where each step is designed to be clocked by an independent clock. Thus by using a faster clock for the MEA block, the complexity and the decoding latency can be reduced. It can support both continuous- and burst-mode decoding. It has been designed in VHDL and synthesized in an FPGA chip, consuming 3,717 logic cells and 2,048-bit memories. The maximum decoding throughput is 33 MByte/sec.

VLSI architecture design of CAVLC entropy encoder/decoder for H.264/AVC (H.264/AVC를 위한 CAVLC 엔트로피 부/복호화기의 VLSI 설계)

  • Lee Dae-joon;Jeong Yong-jin
    • The Journal of Korean Institute of Communications and Information Sciences
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    • v.30 no.5C
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    • pp.371-381
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    • 2005
  • In this paper, we propose an advanced hardware architecture for the CAVLC entropy encoder/decoder engine for real time video compression. The CAVLC (Context-based Adaptive Variable Length Coding) is a lossless compression method in H.264/AVC and it has high compression efficiency but has computational complexity. The reference memory size is optimized using partitioned storing method and memory reuse method which are based on partiality of memory referencing. We choose the hardware architecture which has the most suitable one in several encoder/decoder architectures for the mobile devices and improve its performance using parallel processing. The proposed architecture has been verified by ARM-interfaced emulation board using Altera Excalibur and also synthesized on Samsung 0.18 um CMOS technology. The synthesis result shows that the encoder can process about 300 CIF frames/s at 150MHz and the decoder can process about 250 CIF frames/s at 140Mhz. The hardware architectures are being used as core modules when implementing a complete H.264/AVC video encoder/decoder chip for real-time multimedia application.

Measurements and Statistical Modeling of Ignition Noise from Vehicle (자동차 점화계통에서 발생된 전자파 잡음의 측정 및 통계적 모형)

  • 김종호;윤현보;백락준;우종우
    • The Journal of Korean Institute of Electromagnetic Engineering and Science
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    • v.8 no.4
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    • pp.390-402
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    • 1997
  • The ignition noises from the vehicle are measured and the measurement data are statistically treated for modeling. The low-noise amplifier and band-pass filter are added between the receiver and the three axes antenna for low noise level measurement and the APD and PSD are measured in 800 MHz frequency range. The measured APD curves can be expressed in terms of sensitivity study of each model through 3(class A) or 6(Class B) parameters variation, and these optimal parameter can easily be calculated by using the Composite Approximation Algorithm. The selected APD parameter can be used for making the Data Base EM-environments and also applied to determine the output and sensitivity margin for the transmitter and receiver. 'Digital microwave transmission systems are equipped with equalizer against fading during multipath fading. In this paper, we proposed variable reference tap position equalizer that varies the reference tap according to fading type to archive better performance. We got the perf?mance improvement about 4~5 dB in MP condition and 2~3 dB in NMP condition from simulation results.

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Design and Implementation of the Digital Neuron Processor for the real time object recognition in the making Automatic system (생산자동화 시스템에서 실시간 물체인식을 위한 디지털 뉴런프로세서의 설계 및 구현)

  • Hong, Bong-Wha;Joo, Hae-Jong
    • Journal of the Korea Society of Computer and Information
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    • v.12 no.3
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    • pp.37-50
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    • 2007
  • In this paper, we designed and implementation of the high speed neuron processor for real time object recognition in the making automatic system. and we designed of the PE(Processing Element) used residue number system without carry propagation for the high speed operation. Consisting of MAC(Multiplication and Accumulation) operator using residue number system and sigmoid function operator unit using MAC(Mixed Radix conversion) is designed. The designed circuits are descript by C language and VHDL(Very High Speed Integrated Circuit Hardware Description Language) and synthesized by compass tools and finally, the designed processor is fabricated in $0.8{\mu}m$ CMOS process. we designed of MAC operation unit and sigmoid proceeding unit are proved that it could run time 0.6nsec on the simulation and improved to the speed of the three times and decreased to hardware size about 50%, each order. The designed neuron processor can be implemented of the object recognition in making automatic system with desired real time processing.

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Investigation of Conserved Genes in Eukaryotes Common to Prokaryotes (원핵생물과 공통인 진핵생물의 보존적 유전자 탐색)

  • Lee, Dong-Geun
    • Journal of Life Science
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    • v.23 no.4
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    • pp.595-601
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    • 2013
  • The clusters of orthologous groups of proteins (COG) algorithm was applied to identify essential proteins in eukaryotes and to measure the degree of conservation. Sixty-three orthologous groups, which were conserved in 66 microbial genomes, enlarged to 104 eukaryotic orthologous groups (KOGs) and 71 KOGs were conserved at the nuclear genome of 7 eucaryotes. Fifty-four of 71 translation-related genes were conserved, highlighting the importance of proteins in modern organisms. Translation initiation factors (KOG0343, KOG3271) and prolyl-tRNA synthetase (KOG4163) showed high conservation based on the distance value analysis. The genes of Caenorhabditis elegans appear to harbor high genetic variation because the genome showed the highest variation at 71 conserved proteins among 7 genomes. The 71 conserved genes will be valuable in basic and applied research, for example, targeting for antibiotic development.

Evaluation of Body Movement during Sleep with a Thermopile, Wavelets and Neuro-fuzzy Reasoning

  • Yoon, Young-Ro;Shin, Jae-Woo;Lee, Hyun-Sook;Jose C.Principe
    • Journal of Biomedical Engineering Research
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    • v.25 no.1
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    • pp.5-10
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    • 2004
  • Body movement is one of the important factors in sleep analysis. In this study, a thermopile detector with four channels was implemented as a non-contacting detector of body movement in sleep. Using a thermopile mathematical model and several frames of thermal images, the possibility of detecting body movement was evaluated. Instant body movement signals were evaluated for the upper, lower, and entire body using the Haar wavelet. This decomposition shows the points in time when the upper-body or lower-body movement occurred and the level of body movement. Additionally, partial body movement was decomposed in head-only, whole body, and leg-only movement using the ANFIS algorithm. Finally, three subject's data were evaluated for 60 minutes, and the detection rates of instant and partial body movement, on average, were 96.3% and 89.2%, respectively.

2 Dimensional FEM Elastic Wave Modeling Considering Surface Topography (불규칙 지형을 고려한 2차원 유한요소 탄성파 모델링)

  • Lee, Jong-Ha;Suh, Jung-Hee;Shin, Chang-Soo
    • Geophysics and Geophysical Exploration
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    • v.4 no.2
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    • pp.34-44
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    • 2001
  • Forward modeling by construction of synthetic data is usually practiced in a horizontal surface and a few subsurface structures. However, in-situ surveys often take place in such topographic changes that the corrupted field data always make it difficult to interpret the right signals. To examine the propagation characteristic of elastic waves on the irregular surface, a general mesh generation code for finite element method was modified to consider the topography. By implementing this algorithm, the time domain modeling was practiced in some models with surface topography such as mound, channel, etc. The synthetic data obtained by receivers placed on surface also agreed with the analytic solution. The snapshots showing the total wave-field revealed the propagation characteristic of the elastic waves through complex subsurface structures and helped to identify the signals on the time traces. The transmission of Rayleigh waves along the surface, compressive waves, and sheer waves was observed. Moreover, it turned out that the Rayleigh waves behave like a new source at the edge.

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Development of a SAD Correlater for Real-time Stereo Vision (실시간 스테레오 비젼 시스템을 위한 SAD 정합연산기 설계)

  • Yi, Jong-Su;Yang, Seung-Gu;Kim, Jun-Seong
    • Journal of the Institute of Electronics Engineers of Korea CI
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    • v.45 no.1
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    • pp.55-61
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    • 2008
  • A real-time three-dimensional vision is a passive system, which would support various applications including collision avoidance, home networks. It is a good alternative of active systems, which are subject to interference in noisy environments. In this paper, we designed a SAD correlator with respect to resource usage for a real-time three-dimensional vision system. Regular structures, linear data flow and abundant parallelism make the correlation algorithm a good candidate for a reconfigurable hardware. We implemented two versions of SAD correlator in HDL and synthesized them to determine resource requirements and performance. From the experiment we show that the SAD correlator fits into reconfigurable hardware in marginal cost and can handle about 30 frames/sec with $640{\times}480$ images.