• Title/Summary/Keyword: Implementation technique

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A Study on the Interframe Image Coding Using Motion Compensated and Classified Vector Quantizer (Ⅱ : Hardware Implementation) (이동 보상과 분류 벡터 양자화기를 이용한 영상 부호화에 관한 연구 (Ⅱ: 하드웨어 실현))

  • Jeon, Joong-Nam;Shin, Tae-Min;Choi, Sung-Nam;Park, Kyu-Tae
    • Journal of the Korean Institute of Telematics and Electronics
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    • v.27 no.3
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    • pp.21-30
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    • 1990
  • This paper describes a hardware implementation of the interframe monochrome video CODEC using a MC-CVQ(Motion Compensated and Classified Vector Quantization) algorithm. The specifications of this CODEC are (1) the resolution of image is $128{\times}128$ pixels, and (2) the transmission rates are about 10frames/sec at the 64Kbps channel. In order to design the CODEC under these conditions, it is implemented by a multiprocessor system composed of MC unit, CVQ nuit and decoder unit, which are controlled by microprogramming technique. And the 3~stage pipelined ALU(Arithmetic and Logic Unit) is adopted to calculate the minimum error distance in the MC unit and CVQ nuit. The realized system shows that the transmission rates are 6-15 frames/sec according to the relative motion of the video signal.

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A study on implementation of optical high-speed multiplier using multiplier bit-pair recoding derived from Booth algorithm (Booth 알고리즘의 승수 비트-쌍 재코딩을 이용한 광곱셈기의 구현에 관한 연구)

  • 조웅호;김종윤;노덕수;김수중
    • Journal of the Korean Institute of Telematics and Electronics D
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    • v.35D no.10
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    • pp.107-115
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    • 1998
  • A multiplier bit-pair recoding technique derived from Booth algorithm is used as an effective method that can carry out a fast binary multiplication regardless of a sign of both multiplicand and multiplier. In this paper, we propose an implementation of an optical high-speed multiplier which consists of a symbolic substitution adder and an optical multiplication algorithm, which transforms and enhances the multiplier bit-pair recoding algorithm to be fit for optical characteristics. Specially, a symbolic substitution addition rules are coded with a dual-rail logic, and so the complement of the logic of the symbolic substitution adder is easily obtained with a shift operation because it is always present. We also construct the symbolic substitution system which makes superposition image by superimposing two shifted images in a serial connection and recognizes a reference image by feeding this superimposed image to a mask. Thus, the optical multiplier, which is compared with a typical system, is implemented to the smaller system by reducing the number of optical passive elements and the size of this system.

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Design and Implementation of an Electronic Approval System for Intranet in Multi-Server Environment (멀티서버 환경에서 인트라넷용 전자결재시스템 설계 및 구현)

  • 박창서;고형화
    • Journal of the Korean Institute of Telematics and Electronics C
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    • v.36C no.11
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    • pp.1-9
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    • 1999
  • As our society turns into the information age from the industrial one, the ministry of information and communication has set up functional software standards for electronic approval systems Several software houses have developed such systems in the client/server environment and subsequently for the intranet. Although electronic approval systems for the intranet have the advantages of less costly implementation and ease of use, they create heavy network traffic, and have a poor document processing functionality resulting from the lack of document processor in web environments. This paper describes a system design that web browsers utilize the resources of clients by adopting the ActiveX technique in order to improve such mallets mentions above. In other words, to use the Hangul word processor as a document processor, the ActiveX control and the Hangul DDE API have been implemented in the form of the DDE server/client, which is capable of mutual communication, and the flow of electronic approve system has been controled by connecting. As a result of running the implemented system lot three months through a real company in multi-server environment, it shows the high usage of electronic approval system as the tate roaches 75%-93% for some departments.

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Design and Implementation of Web Service S/W Platform for Remote Monitoring and Control (원격 감시제어를 위한 웹 서비스 S/W 플랫폼 설계 및 구현)

  • Lee, Tae-Hee;Kim, Joo-Man
    • The Journal of the Korea Contents Association
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    • v.7 no.12
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    • pp.245-253
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    • 2007
  • In this paper, we propose an effective web service software platform for remote monitoring and control. We removed the servlet container for better web service performance so as to improve the gSOAP processing which is an essential element of web service implementation. Furthermore, we designed the web service server/client software platform which can be applied to robot or ubiquitous sensor applications. For validation of this study we tested it by manufacturing robot hardware for monitoring control which combined tanks and sensors on a LDS4000 engine board mounted with a PXA270 processor. The practical excellence and the efficiency of the result of this study was validated by the comparison of gSOAP message exchange load between the web service client application and the conventional remote monitoring control technique through a web server.

Implementation of Precise Drone Positioning System using Differential Global Positioning System (차등 위성항법 보정을 이용한 정밀 드론 위치추적 시스템 구현)

  • Chung, Jae-Young
    • Journal of the Korea Academia-Industrial cooperation Society
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    • v.21 no.1
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    • pp.14-19
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    • 2020
  • This paper proposes a precise drone-positioning technique using a differential global positioning system (DGPS). The proposed system consists of a reference station for error correction data production, and a mobile station (a drone), which is the target for real-time positioning. The precise coordinates of the reference station were acquired by post-processing of received satellite data together with the reference station location data provided by government infrastructure. For the system's implementation, low-cost commercial GPS receivers were used. Furthermore, a Zigbee transmitter/receiver pair was used to wirelessly send control signals and error correction data, making the whole system affordable for personal use. To validate the system, a drone-tracking experiment was conducted. The results show that the average real-time position error is less than 0.8 m.

Design and Implementation of a Media Player That Playing Several Moving Pictures in Real Time (실시간에서 여러 개의 동영상을 재생하는 미디어 플레이어의 설계 및 구현)

  • 조종근;김상민;임영환
    • Journal of Korea Multimedia Society
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    • v.6 no.6
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    • pp.1015-1024
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    • 2003
  • With the improvement of the computer performance, the users demand for the multimedia player is getting higher, which will be the major force behind the wide distribution of the media player that allows several moving pictures to run simultaneously using multiple windows on the screen. Products that adopted the same method used for a single moving picture and yet support the several moving pictures simultaneously emerged; however, they are not immune from problems. In this paper, we propose method to solve the problems of blinking, play prioritization processor and semi-transparent Processor that occur when appling several moving pictures to the method used for a single moving picture and suggested the possible solutions. Taking it one step further, it focused on design and implementation of the media player that allows several moving pictures using overlapping and overlay technique by recognizing the biggest problem, which is that the above media play is not supported when playing several moving pictures simultaneously.

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An implementation of performance assessment system based on academic achievement analysis for promotion of self-directed learning ability (자기주도적 학습능력 촉진을 위한 학업성취도 분석 기반의 수행평가 시스템 구현)

  • Kim, Hyun-Jeong;Choi, Jin-Seek
    • Journal of The Korean Association of Information Education
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    • v.13 no.3
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    • pp.313-323
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    • 2009
  • The objective of this paper is an implementation of analysing and predicting functions to promote self-directed learning for student's performance assessment system in programming subjects. By adapting Rubric model, the proposed functions inform a student of the assessment criteria and level to be carried out with respects to two-way specifications such as rational ability, problem solving ability and creativity. The proposed system also provides a graphical results of each ability instead of assessment result, for better understanding and analyzing himself/herself based on to the performance assessment and the result. Moreover, the proposed system contains a method to predict future achievement result with moving average technique. Therefore, an academic achievement can be precisely determined by himself/herself to estimate self-directed learning. The teacher can provide different level of educational resources such as supplement learning, problem explains and private instructor etc., in order to maximize efficiency of education.

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Implementation of a Robust Visual Surveillance System for the Variation of Illumination Lights (조명광 변화에 강인한 영상 감시시스템 구현)

  • Jung, Yong-Bae;Kim, Jung-Hyeon;Kim, Tae-Hyo
    • Journal of the Korea Institute of Information and Communication Engineering
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    • v.10 no.3
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    • pp.517-525
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    • 2006
  • In this paper, the algorithm which improve the efficiency of surveillance in spite of the change of light is proposed and confirmed by virtue of the experiments. One of the problems for the implementation of visual surveillance system is the image processing technique to overcome with the variations of illumination lights. Some conventional systems are generally not considered the error due to the change of lights because the system use at indoor. In practical, the factors of bad image can be classified to the ghosts due to the reflection of lights and shadows in a scene. Especially weak images and noises at night are decreased the performance of visual surveillance system. In the paper, the filter which improve the images with some change of illumination lights is designed and the gabor filter is used for recognition and tracking of the moving objects. In the results, the system showed that the recognition and tracking were obtained $92\sim100%$ of recognition rate at daytime, but $80\sim90%$ of nighttime.

A Hardware Implementation of EGML-based Moving Object Detection Algorithm (EGML 기반 이동 객체 검출 알고리듬의 하드웨어 구현)

  • Kim, Gyeong-hun;An, Hyo-sik;Shin, Kyung-wook
    • Journal of the Korea Institute of Information and Communication Engineering
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    • v.19 no.10
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    • pp.2380-2388
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    • 2015
  • A hardware implementation of MOD(moving object detection) algorithm using EGML(effective Gaussian mixture learning)- based background subtraction to detect moving objects in video is described. Some approximations of EGML calculations are applied to reduce hardware complexity, and pipelining technique is adopted to improve operating speed. The MOD processor designed in Verilog-HDL has been verified by FPGA-in-the-loop verification using MATLAB/Simulink. The MOD processor has 2,218 slices on the Virtex5-XC5VSX95T FPGA device and its throughput is 102 MSamples/s at 102 MHz clock frequency. Evaluation results of the MOD processor for 12 images in the IEEE CDW-2012 dataset show that the average recall value is 0.7631, the average precision value is 0.7778 and the average F-measure value is 0.7535.

Forward Migration of an Active Rule Mobile Agent using the Meta_data (메타데이터를 이용한 능동규칙 이동에이전트의 정 방향 이주)

  • Lee, Yon-Sik;Lee, Jun-Ho
    • Journal of the Korea Institute of Information and Communication Engineering
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    • v.16 no.7
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    • pp.1567-1574
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    • 2012
  • Since a migration method of the mobile agent is a factor that affects the overall performance of the entire distributed system, it is necessary to find efficient migration methods of the mobile agent within the sensor network and to collect and store data related to various components(server, sink and sensor node) of the sensor network, thereby providing consistent naming services. Accordingly, this paper presents design and implementation of MetaTable that is divided into MetaData where information on the sensor data server is stored and SubMetaData where various types of information on sink nodes and data on sensor nodes connected with the sink nodes is stored. Moreover, the paper also presented the implementation of forward migration of an active rule mobile agent applying the naming method based on RMI that used the meta_table and proposed the possibility of constructing efficient sensor network application environment. In this paper, for registration, release and retrieval methods suitable for new sensor network environment, we designed and implemented the naming agent by applying J2EE model based on RMI-IIOP(Internet Inter-ORB Protocol) technique.