• The Journal of Korean Institute of Communications and Information Sciences
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• v.33 no.11C
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• pp.949-954
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• 2008

An ultrawide band (UWB) signal model is proposed to estimate the angle-of-arrivals of the signals arrived in clusters at an UWB receiver for a short-range, high-speed, indoor wireless communication system in an elliptical scattering environment. And a new estimation technique is proposed by modifying the conventional MUSIC algorithm. By using this estimation technique, the estimates of the two unknown parameter sets, angle-of-arrivals and distribution parameters, are obtained with the proposed UWB signal model. The proposed UWB signal model and estimation technique are verified through computer simulations in an ultrawide band communication environment.

• Journal of the Korea Institute of Information and Communication Engineering
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• v.17 no.12
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• pp.2793-2799
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• 2013

This paper proposes an effective feature compensation method to improve speech recognition performance in time-varying background noise condition. The proposed method employs principal component analysis to improve the variational model composition method. The proposed method is employed to generate multiple environmental models for the PCGMM-based feature compensation scheme. Experimental results prove that the proposed scheme is more effective at improving speech recognition accuracy in various SNR conditions of background music, compared to the conventional front-end methods. It shows 12.14% of average relative improvement in WER compared to the previous variational model composition method.

• KSII Transactions on Internet and Information Systems (TIIS)
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• v.13 no.5
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• pp.2574-2587
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• 2019

Blind Source Separation (BSS) is a technique used to separate supposed independent sources of signals from a given set of observations. In this paper, the High Exploration Particle Swarm Optimization (HEPSO) algorithm, which is an enhancement of the Particle Swarm Optimization (PSO) algorithm, has been used to separate a set of source signals. Compared to PSO algorithm, HEPSO algorithm depends on two additional operators. The first operator is based on the multi-crossover mechanism of the genetic algorithm while the second one relies on the bee colony mechanism. Both operators have been employed to update the velocity and the position of the particles respectively. Thus, they are used to find the optimal separating matrix. The proposed method enhances the overall efficiency of the standard PSO in terms of good exploration and performance. Based on many tests realized on speech and music signals supplied by the BSS demo, experimental results confirm the robustness and the accuracy of the introduced BSS technique.

• International journal of advanced smart convergence
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• v.10 no.3
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• pp.181-186
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• 2021

Among human intellectual creations, the right granted by law to what is worth protecting is defined as intellectual property rights. Copyright is a legal right to creative finished products made by individuals, and in recent years, this legal right has been recognized as very important. In other words, copyright is a system created to protect the rights of individuals who created creations and to recognize their efforts. Works subject to copyright vary from poetry, thesis, novels to designs, paintings, music, and architecture, and the scope of the subject is gradually expanding. Recently, research has begun on how far the Metaverse design area absorbed into the real world among works. Computer-generated video productions and software program works are also subject to digital copyright protection, but it is also true that the interpretation of the author protection law for works, designs, and trademarks in the virtual world is unclear. This study aims to analyze copyrights based on case studies and theoretical backgrounds on copyright protection and to discuss the protection limitations of Metaverse design in the virtual world. In other words, the direction for the protection of Metaverse design is presented through clear distinction and definition of copyright protection in the tertiary virtual world. This study aims to present methods for design copyright protection in the era of Metaverse, respect copyright holders' creative activities, and develop our culture through protection of creations.

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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• 2009.05a
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• pp.72-75
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• 2009

XML과 웹서비스의 등장으로 전자문서 관리의 중요성이 대두되었고, 효율적인 관리를 위해 많은 기업들이 기술 개발을 해오고 있다. 그러나 웹언어나 프로토콜에 대한 공개 표준이 제정 되지 않아 기업들은 개별적으로 웹서비스를 구축하고 이는 인터넷 시장과 웹의 분열을 가져왔다. 이에 W3C에서는 웹 상호운용성을 목표로 XML표준안을 공표했다. MusicXML, MathML, CML(Chemistry Markup Language), WML(Wireless Markup Language)등은 모두 특정한 용도를 가지는 XML기반의 마크업 언어들이다. XML은 단지 웹 환경만을 위한 표준이 아니라 인터넷 전반에서 데이터를 생성, 저장, 변환하기 위한 보편적인 표준으로 자리 잡고 있다. 본 논문에서는 모바일환경과 웹 환경에서 동시 서비스가 가능한 XML 웹서비스를 구현하였다. XML 웹서비스는 인터넷 표준기술인 XML과 HTTP를 사용하는데, XML기반의 SOAP메시지를 파싱하기 위하여 WIPI와 HTML기반으로 설계, 개발하였다. 제안하는 XML Parser는 PULL모델을 변형한 이벤트 방식이다. 제안한 Parser는 모바일기기와 웹 환경에서 동시 사용가능한 인터넷 서점에 적용하였고, 제안하는 XML Parser와 기존의 Parser들과의 벤치마킹을 통해 속도비교를 함으로써 Parsing속도의 향상을 나타내었다.

• KSII Transactions on Internet and Information Systems (TIIS)
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• v.15 no.1
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• pp.285-301
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• 2021

Recently, with the diversification of media services and the development of smart devices, users have more opportunities to use digital content, such as movies, dramas, and music; consequently, the size of the copyright market expands simultaneously. However, there are piracy sites that generate revenue by illegal use of copyrighted works. This has led to losses for copyright holders, and the scale of copyrighted works infringed due to the ever-increasing number of piracy sites has increased. To prevent this, government agencies respond to copyright infringement by monitoring piracy sites using online monitoring and countermeasure strategies for infringement. However, the detection and blocking process consumes a significant amount of time when compared to the rate of generating new piracy sites. Hence, online monitoring is less effective. Additionally, given that piracy sites are sophisticated and refined in the same way as legitimate sites, it is necessary to accurately distinguish and block a site that is involved in copyright infringement. Therefore, in this study, we analyze features of piracy sites and based on this analysis, we propose an intelligent detection technique for piracy sites that automatically classifies and detects whether a site is involved in infringement.

• Journal of Korea Society of Industrial Information Systems
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• v.15 no.5
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• pp.89-95
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• 2010

Currently memorandum have been a method to manage information easily by short writing. In particular, a electronic memorandum system has been efficiently used for business purpose, which is available in a computer widely used in our daily life. Considering the smart business environment, we propose a multi-functional electronic memorandum system in this paper, which is helpful to manage information intelligently in the smart business environment. The proposed system maintains the contents of memorandum in a database structure, so it is available without any restrictions in time and place. In addition, it also has additional functions of music playing, capturing working screens, and scheduling. The functions help for the proposed system to be widely used in the smart business environment.

• Annual Conference of KIPS
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• 2011.11a
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• pp.306-309
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• 2011

컴퓨터의 발전과 함께 음악 프로그램을 이용한 작곡 작업은 전문가부터 일반인에게 이르기까지 사용자의 폭을 넓혀왔다. 본 연구에서는 이러한 작곡 작업을 보다 효과적으로 하기 위하여 다양한 방안을 모색하였다. 단순한 텍스트 기반의 음악 검색이 아닌 미디(Midi) 분석엔진 기반의 다양한 검색방법을 설계하였으며 이를 기반으로 통합 음악제작/검색 솔루션을 구현하였다. 또한, 휴대성(Portability)을 위하여 MS 사의 WindowsPhone7 플랫폼 기반의 어플리케이션 구현을 통해 PC기반의 프로그램을 모바일 환경에서 작동 및 사용할 수 있도록 구현하였다.

• The Journal of the Korea institute of electronic communication sciences
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• v.8 no.1
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• pp.165-171
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• 2013

This study elects 934 high school students in Kwangju, conducts the survey of the actual condition of the youn's leisure, and comes to a conclusion as follows. the young spend mean 9-10 hours a day on class, mean 6 hours on sieeping, and mean 1-2 hours on self-learning. their spending money is less than 30,000 won and is not enough as the past years. While 33.2% of respondents answered they were trained for leisure activities, 66.8% were not. Also thesurvey indicates that 79.9% of the young think a leisure course will be contribute to sound youth. In kinds of leisure, the young prefer computer game, watching TV, video game, or listening to music which are not active. It is required to guide them to enjoy active leisure activities together. the young think their leisure time is not enough, average(41%) and not enough(37.5%). Especially, thy cannot have enough time to enjoy leisure(62.5%). The young are not satisfied of leisure facilities.

• Journal of the Korea Computer Industry Society
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• v.7 no.5
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• pp.573-582
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• 2006

The game is in progress according to the game story with the text, graphic, animation, motion picture, music, etc. Also the result of the game varies depending on the strategy and tactics of the player. For the development of the game, this paper describes the task of the game planner, game programmer, and game graphic designer. Game graphic designers are classified into 4 parts such as the art director, original picture designer, 2D designer, and 3D designer. Among these, the 3D designer makes the 3D game characters with the use of 3D tools. This paper presents the method that 3D designers and beginners can develop 3D characters easily and quickly, Also, this paper shows the method for making preparations of SourceModel which includes 150 polygons. The SourceModel is made up of between five life size and eight life size. In addition, Character Primitives Interface is made to use SourceModel in MaxScript. Accordingly 3D designers have the free use of SourceModel and they will be able to save time.