• Proceedings of the Korean Information Science Society Conference
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• 2001.10c
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• pp.724-726
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• 2001

SyncML은 무선 분산환경에서 멀티플 네트웍과 플랫폼, 그리고 장치간 공유 데이터를 서로 일치(동기)시키는 산업계 표준 프로토콜로 떠오르고 있는 신기숱이다. 지금까지 무선 데이터 동기화는 지역적인 제약이 따라왔고 서로 다른 프로토콜을 사용하는 플랫폼간의 동신이나 데이터 교환이 불가능하였다. 이에 SyncML 기술을 이용한 무선 데이터 동기 방식의 표준이 제정 되었으며 이를 구현한 서로 다른 플랫폼간의 연동성과 적합성을 테스트 하는 것이 필수적인 요소로 떠오르고 있다. 이 논문에서 는 SyncML 을 구현한 멀티플 플랫폼간의 적합성 및 연동성을 테스트하기 위한 방안과 사례를 제시한다.

• Proceedings of the Korea Information Processing Society Conference
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• 2002.11b
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• pp.1229-1232
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• 2002

PDA, 노트북, 데스크탑 등 다수의 단말 장치에 분산되어 있는 동일한 데이터들에 대해 가장 최신 값으로 일치시키는 것을 데이터 동기화(data synchronization)라고 한다. 기존의 동기화 솔루션들은 장치간 또는 응용 서비스간 호환성이 결여되었다. 이러한 문제점을 해결하기 위하여 SyncML 프로토콜 표준 규격이 발표되었다. 본 논문에서는 SyncML 표준 규격을 따르며 사용자 단말에서 실행되는 클라이언트를 설계하고 구현하였다. 또한, 기능을 검증하기 위하여 본 연구팀이 이미 구현한 SyncML 서버와의 테스트를 수행하였으며, PIMS 서비스에 대해 서버와 효과적으로 데이터 동기를 수행함을 확인하였다.

• The Journal of the Institute of Internet, Broadcasting and Communication
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• v.18 no.3
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• pp.127-134
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• 2018

In this paper, we have developed the Auto Lip-Sync Maya plug-in for extracting Korean phonemes from voice data and text information based on Korean and produce high quality 3D lip-sync animation using divided phonemes. In the developed system, phoneme separation was classified into 8 vowels and 13 consonants used in Korean, referring to 49 phonemes provided by Microsoft Speech API engine SAPI. In addition, the pronunciation of vowels and consonants has variety Mouth Shapes, but the same Viseme can be applied to some identical ones. Based on this, we have developed Auto Lip-sync Maya Plug-in based on Python to enable lip-sync animation to be implemented automatically at once.

• Journal of the Korea Institute of Information and Communication Engineering
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• v.17 no.6
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• pp.1375-1382
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• 2013

A shared whiteboard provides a drawing workplace that can be shared with peoples in real time. Since it supports rich drawing mechanisms for collaboration or communication, it is used as an effective tool in group work such as virtual meeting. In this paper, we present an XMPP client application named SyncNote that supports the shared whiteboard facility. For this, we propose an extension of the open standard communication protocol XMPP to provide the shared whiteboard facility. The SyncNote application runs on the Android platform, providing effective communication through sharing the drawings and images created by a group of users.

• Journal of the Institute of Electronics Engineers of Korea TC
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• v.48 no.3
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• pp.19-27
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• 2011

Due to the growth of optical fiber network technologies, most networks recently support several tens of Gb/s bandwidth. UDT(UDP-based Data Transfer protocol) is an optimized protocol for bulk data transmission on the network, which has the high bandwidth and long delay time. It periodically controls the sending rate on the fixed sync-interval, 0.01 sec. Here, if the network traffic status varies quickly, available network bandwidth is not able to be properly utilized in-between the sync-intervals. In this paper, we propose an adaptive rate control method with considering the network traffic status in-between the sync-interval periods. The network traffic status is determined based on the RTT variances. With dividing the network status into four classes, the proposed method performs a new rate control by adjusting the inter-packet sending period for a corresponding class. As a simulation result, the proposed method improves the message delivery throughput as well as stability than that of the existing UDT Protocol.

• Journal of KIISE:Computing Practices and Letters
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• v.11 no.4
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• pp.357-367
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• 2005

According to the recent advancement of mobile computing technology and the hardware technology, the mobile device has rapidly come into wide use.'rho data in the central management server needs to confirm to that in mobile devices in order for the mobile device users to access the needed data regardless of time and place. This is called Data Synchronization. Currently, major mobile device manufacturing companies provide the data synchronization solutions, but these solutions are not compatible with other mobile devices/other applied services. In order to solve this problem, OMA(Open Mobile Alliance), mainly composed of mobile telecommunication companies, has suggested using the SyncML(Synchronization Markup Language) data synchronization method. This is an attempt to make a public standard. In this paper, the data synchronization client that synchronizes the PIMS (Personal Information Management System) data in mobile devices like PDA is developed, complying with the SyncML standard requirements.

• The Journal of Korean Institute of Communications and Information Sciences
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• v.35 no.4C
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• pp.358-363
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• 2010

In IEEE 802.15.4a IR-UWB (Impulse Radio Ultra Wideband) systems, it is crucial to acquire initial carrier/timing synchronization and estimate channel response by exploiting the SYNC symbols embedded in each packet. On the other hand, it is also crucial to detect the SFD pattern followed by the header and data symbols to reliably extract the information contained in the packet. In this paper, we propose a reliable SFD detection scheme utilizing some surplus SYNC symbols in addition to SFD symbols to improve the SFD detection performance.

• Journal of Digital Convergence
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• v.10 no.7
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• pp.253-259
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• 2012

In this study, the dialog syntax-based video content production flow for the character set, 'Form Noah' chart using the mouse, lip-sync Animation been making 3D characters were applying. Vertex Animation Morphing techniques by expressing the natural shape of the mouth for the characters engaging and the transmission of visual information for the viewers to be able to get a high intelligibility is considered.

• Proceedings of the Korea Information Processing Society Conference
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• 2003.05b
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• pp.843-846
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• 2003

현재 주식정보나 과학기술정보 등에 대한 이동 정보 서비스가 무선 인터넷을 통해 사용자에게 제공되고 있으나 상호호환성이 어려운 단점이 있다 본 연구는 과학기술정보 서비스를 대상으로 개방형 표준 데이터 동기화 프로토콜로 제시된 SyncML(Synchronization Markup Language)기술을 이용하여 사용자들에게 자신의 이동 단말기를 통한 원문보기 및 과학기술정보를 이동 단말기에 제공할 수 있는 시스템의 설계 및 구현에 대하여 논한다.

• Proceedings of the Korean Information Science Society Conference
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• 2002.10c
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• pp.415-417
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• 2002

실시간 시스템은 신뢰성이 중요하다. 특히 고안전성 시스템 (Safety-Critical System)은 안전과 직결되므로 높은 신뢰도가 요구된다. 본 논문에서는 Reactive System 의 모델링 및 검증을 위해 개발된 정형 검증 언어인 SyncCharts를 이용한 실시간 시스템의 스케줄가능성 분석(Schedulability Analysis)을 통해 시스템에 대한 요구조건의 만족여부와 태스크들의 수행가능성을 검증하는 방법을 제시한다.