• Title/Summary/Keyword: Spatial synchronization

Search Result 74, Processing Time 0.022 seconds

Design of Spatial Data Synchronization System in Mobile Environment

  • Lee Hyejin;Kim Jinsuk
    • Proceedings of the KSRS Conference
    • /
    • 2004.10a
    • /
    • pp.245-248
    • /
    • 2004
  • In this paper, we propose a framework for synchronization of spatial data between mobile devices and a server by using SyncML(Synchronization Markup Language) that is standard specification for synchronization protocol. We used GML (Geographic Markup Language) to support interoperability of spatial data between various data sources. We also used metadata and catalog service to access and integrate distributed spatial data, considering relationships of spatial data and non-spatial data.

  • PDF

Time Synchronization Error and Calibration in Integrated GPS/INS Systems

  • Ding, Weidong;Wang, Jinling;Li, Yong;Mumford, Peter;Rizos, Chris
    • ETRI Journal
    • /
    • v.30 no.1
    • /
    • pp.59-67
    • /
    • 2008
  • The necessity for the precise time synchronization of measurement data from multiple sensors is widely recognized in the field of global positioning system/inertial navigation system (GPS/INS) integration. Having precise time synchronization is critical for achieving high data fusion performance. The limitations and advantages of various time synchronization scenarios and existing solutions are investigated in this paper. A criterion for evaluating synchronization accuracy requirements is derived on the basis of a comparison of the Kalman filter innovation series and the platform dynamics. An innovative time synchronization solution using a counter and two latching registers is proposed. The proposed solution has been implemented with off-the-shelf components and tested. The resolution and accuracy analysis shows that the proposed solution can achieve a time synchronization accuracy of 0.1 ms if INS can provide a hard-wired timing signal. A synchronization accuracy of 2 ms was achieved when the test system was used to synchronize a low-grade micro-electromechanical inertial measurement unit (IMU), which has only an RS-232 data output interface.

  • PDF

The Classification of Game Spaces and the Notations for Spatio-Temporal Synchronization on a Scenario (게임 공간의 분류와 시나리오의 시간 및 공간 동기화 표현법)

  • Ha, Su-Cheol;Seong, Hae-Gyeong
    • The Transactions of the Korea Information Processing Society
    • /
    • v.6 no.10
    • /
    • pp.2630-2641
    • /
    • 1999
  • Most of the previous game development has proceeded in the approaches of the temporal-oriented synchronization because of producing game objects by using general authoring tools, and ad hoc or trial and error methods has been devised for representation of spatial concept. This paper is a study on the unification notation for spatio-temporal synchronization to conquest this fault. First of all, we classify game space as temporal object, spatial object, absolute/relative spatio-temporal space. The spatio-temporal relationships are divided into temporal extent, temporal location, spatial extent, and spatial location. In the paper the temporal and spatial relationships of game scene are defined to represent the synchronization, and we propose new unification notation by temporal and spatial concept to represent two concepts putting emphasis on space. Their relationships are presented on 3D by creating time axis related with time in scene unit of the two dimensional plane in the pivot on space. The usability of this representation method are shown by applying examples of game scenario.

  • PDF

Design and Implementation of Multimedia Authoring System using Temporal/Spatial Synchronization Manager (시공간 동기화 관리기를 이용한 멀티미디어 저작 시스템의 설계 및 구현)

  • Yeu, In-Kook;Hwang, Dae-Hoon
    • The Transactions of the Korea Information Processing Society
    • /
    • v.4 no.11
    • /
    • pp.2679-2689
    • /
    • 1997
  • In this paper, a multimedia authoring system using temporal/spatial synchronization manager is designed and implemented to support easy and efficient generation of multimedia title. For this goal, a flowchart-oriented logic generator which represents a title author's design intent into a practical title composition logic without extra translation process, and a logic interpreter which translate and implement the generated title logic, are designed. Furthermore, a temporal/spatial synchronization manager which manages temporal/spatial synchronization information between media data for multimedia representation, is designed. Especially, a temporal specification model and MRL, a formal language for the model, are designed to synchronize the temporal relation between media objects. The MRL represents a complex temporal relation by simple and clear form, and synchronizes efficiently multimedia representation according to the author's intent. A presentation frame editor which makes coincidence between visible size of representation media and attachment point, is implemented for spatial synchronization.

  • PDF

Design of a Two-Way Synchronization Protocol for Mobile GIS DB (모바일 GIS DB를 위한 양방향 동기화 프로토콜 설계)

  • Kim, Hong-Ki;Lim, Chang-Woo;Lee, Sang-Sin;Cho, Dae-Soo;Kim, Dong-Hyun
    • Proceedings of the Korean Institute of Information and Commucation Sciences Conference
    • /
    • 2008.05a
    • /
    • pp.183-186
    • /
    • 2008
  • In ubiquitous GIS system, the spatial information could be updated and utilied by mobile terminals. Spatial information stored in mobile terminals should be able to synchronize to the server. However, in mobile environment, there are some limitations in synchronization service due to the limited bandwidth. The ActMAP system, that was developed to consider of mobile environment, has suggested a partial update protocal for synchronization in order to solve the narrow bandwidth problem. But it is still has a problem that it does not consider two-way synchronization between a server and a mobile terminal. This paper suggests a two-way synchronization protocol between a server and mobile terminals. It, therefore, is inclined to supporting updated and utilization of spatial information using mobile terminals.

  • PDF

Designing Database Contents of Spatial Data Warehouse and its Data Synchronization with Distributed Geographic Information Systems in Seoul Metropolitan Government (서울시 공간데이터웨어하우스의 내용설계 및 GIS데이터 연동에 관한 연구)

  • 김학열;김윤종;김준기
    • Spatial Information Research
    • /
    • v.11 no.2
    • /
    • pp.119-130
    • /
    • 2003
  • Since GIS strategic implementation plan was prepared in 1995, Seoul Metropolitan Government (SMG) has implemented the distributed GIS at department level, which prevents various SMG organizations from data-sharing and its common utilization. To solve those problems due to the fragmented GIS structure, SMG developed an action plan for the evolution of enterprise GIS with Spatial Data Warehouse (SDW). In this context, this paper initially analyzed the conceptual architecture of SDW structure and then provided the following guidelines for 1) determining the common GIS data and framework data stored at SDW to satisfy the demand for various GIS data from many SMG departments and sub-organizations, 2) developing the data synchronization process and techniques to make effective data-sharing possible, and 3) making an action plan for enterprise GIS of other self-governmental organizations.

  • PDF

Spatial - Frequency Analysis of time-varying Coherence using ERP signals for attentional visual stimulus (시각 자극의 집중에 따른 시간 변화에 대한 뇌 유발전위의 공간 - 주파수간 상관 변화 분석)

  • Lee, ByuckJin;Yoo, Sun-Kook
    • Science of Emotion and Sensibility
    • /
    • v.16 no.4
    • /
    • pp.527-534
    • /
    • 2013
  • In this study, we analyzed spatial-frequency relationship related brain function for change of the time during attentional visual stimulus through the analysis of Coherence. With experimentation about ERP(Event Related Potential)data, it revealed that change of the phase synchronization between different scalp locations at ${\theta}$, ${\alpha}$ band. ERP between left and right frontal lobes, between the frontal and central lobes showed the phase synchronization at the P100, N200, ERP between the frontal and occipital lobes showed the phase synchronization at the P300 related information of visual stimulus. Compared to STFT using the window of a fixed length, CWT is able to multi-resolution analysis with the adjustment of parameters of mother wavelet. Thus, coherence results with CWT was found to be effective for analysis of time-varying spatial-frequency relationship in ERP. The phase synchronization for inattentional visual stimulus was not observed.

The Design and experiment of 5G-based metaverse motion synchronization system (5G 기반의 메타버스 모션 동기화 시스템의 설계 및 실험)

  • Lee Sangyoon;Lee Daesik;You, Youngmo;You, Hyeonsoo;Lee, Sangku
    • Journal of Korea Society of Digital Industry and Information Management
    • /
    • v.19 no.3
    • /
    • pp.61-75
    • /
    • 2023
  • In this paper, we design and experiment a 5G-based metaverse motion synchronization system with configuration of a mobile motion capture studio that has not been commercialized at home and abroad. As a result of the experiment, the average value of the latency test measurement using Wi-Fi is 0.134 seconds faster than the average latency test measurement value using the 5G network. Existing motion capture studios have spatial limitations as the motion capture range is limited to the Wi-Fi communication range. However, the 5G-based metaverse motion synchronization system configures a mobile motion capture studio so that motion performers can solve the spatial limitations by expanding the motion capture communication range indefinitely regardless of time and place. Therefore, it is possible to implement realistic metaverse contents by displaying a realistic and natural digital human because it is free from spatial constraints. The system which was tested in this paper can create a new business model by converging next-generation technologies that are receiving attention related to the digital virtual world, such as motion capture + 5G + digital human twin + metaverse. And it allows for research and develop a next-generation metaverse-based broadcasting solution at a recent time when the business value of digital human and metaverse technologies and functions has been proven and related sales are growing in earnest.

Real-time Temporal Synchronization and Compensation in Stereoscopic Video (3D 입체 영상시스템의 좌-우 영상에 대한 실시간 동기 에러 검출 및 보정)

  • Kim, Giseok;Cho, Jae-Soo;Lee, Gwangsoon;Lee, Eung-Don
    • Journal of Broadcast Engineering
    • /
    • v.18 no.5
    • /
    • pp.680-690
    • /
    • 2013
  • In this paper, we propose a real-time temporal synchronization and compensation algorithm in stereoscopic video. Many temporal asynchronies are caused in the video editing stage and due to different transmission delays. These temporal asynchronies can degrade the perceived 3D quality. The goal of temporal alignment is to detect and to measure the temporal asynchrony and recover synchronization of the two video streams. In order to recover synchronization of the two video streams, we developed a method to detect asynchronies between the left and the right video streams based on a novel spatiogram information, which is a richer representation, capturing not only the values of the pixels but their spatial relationships as well. The proposed novel spatiogram additionally includes the changes of the spatial color distribution. Furthermore, we propose a block-based method for detection of the pair frame instead of one frame-based method. Various 3D experiments demonstrate the effectiveness of the proposed method.