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한국어 음운체계를 고려한 화자적응 실시간 단모음인식에 관한 연구
황선민(Hwang, Seon-Min),윤한경(Yun, Han-Kyung),송복희(Song, Bok-Hee) 한국정보전자통신기술학회 2013 한국정보전자통신기술학회논문지 Vol.6 No.4
음성인식에 관한 연구는 꾸준히 발전되어 다양한 분야에서 제품에 적용되고 있으며, 특히 스마트폰과 차량의 내비게이션 시스템과 같은 정보기기에서의 적용은 매우 활발히 이루어지고 있는 것이 현실임에도 불구하고 음성인식 연구에서 한국어의 음운 특성을 고려한 연구는 미흡한 것도 현실이다. 디지털 콘텐츠에서 일반적으로 립 싱크의 제작은 애니메이터의 수작업을 반드시 필요로 하며, 이는 시간의 투입을 요하는 지루한 작업이다. 립 싱크를 자동 생성하는 응용 소프트웨어를 사용하기도 하나 반드시 수작업으로 수정과 보정 단계가 요구될 뿐만 아니라 영어 기반으로 제작된 립 싱크 자동생성 소프트웨어를 적용하므로 한국어 음운체계가 달라 자연스러운 립 싱크를 얻기 위하여 많은 시간과 노력이 요구된다. 따라서 본 연구에서는 한국어 음운체계를 고려한 가상 오브젝트들의 립 싱크를 자동 생성하기 위한 화자 독립 기반 한국어 단모음 실시간 인식 알고리즘을 개발을 목표로 하며, 그 인식 결과는 립 싱크의 애니메이션 키로 활용하고자 한다. Voice Recognition technique has been developed and it has been actively applied to various information devices such as smart phones and car navigation system. But the basic research technique related the speech recognition is based on research results in English. Since the lip sync producing generally requires tedious hand work of animators and it serious affects the animation producing cost and development period to get a high quality lip animation. In this research, a real time processed automatic lip sync algorithm for virtual characters in digital contents is studied by considering Korean vocal sound system. This suggested algorithm contributes to produce a natural lip animation with the lower producing cost and the shorter development period.
불확실성하에서의 확률적 기법에 의한 판매 및 실행 계획 최적화 방법론 : 서비스 산업
황선민(Seon Min Hwang),송상화(Sang Hwa Song) 한국산업경영시스템학회 2016 한국산업경영시스템학회지 Vol.39 No.4
In recent years, business environment is faced with multi uncertainty that have not been suffered in the past. As supply chain is getting expanded and longer, the flow of information, material and production is also being complicated. It is well known that development service industry using application software has various uncertainty in random events such as supply and demand fluctuation of developer’s capcity, project effective date after winning a contract, manpower cost (or revenue), subcontract cost (or purchase), and overrun due to developer’s skill-level. This study intends to social contribution through attempts to optimize enterprise’s goal by supply chain management platform to balance demand and supply and stochastic programming which is basically applied in order to solve uncertainty considering economical and operational risk at solution supplier. In Particular, this study emphasizes to determine allocation of internal and external manpower of developers using S&OP (Sales & Operations Planning) as monthly resource input has constraint on resource’s capability that shared in industry or task. This study is to verify how Stochastic Programming such as Markowitz’s MV (Mean Variance) model or 2-Stage Recourse Model is flexible and efficient than Deterministic Programming in software enterprise field by experiment with process and data from service industry which is manufacturing software and performing projects. In addition, this study is also to analysis how profit and labor input plan according to scope of uncertainty is changed based on Pareto Optimal, then lastly it is to enumerate limitation of the study extracted drawback which can be happened in real business environment and to contribute direction in future research considering another applicable methodology.
황선민(Seon-Min Hwang),송복희(Bok-Hee Song),윤한경(Han-Kyung Yun) 한국콘텐츠학회 2011 한국콘텐츠학회논문지 Vol.11 No.9
본 연구는 질량-스프링 모델 기반의 직물 모델에서 질점의 움직임을 분석하여 실시간 직물 애니메이션이 가능한 퍼지 추론 기법을 제안한다. 지금까지 직물과 같은 탄성체를 표현하기 위한 많은 기법들은 질량-스프링 모델을 사용하였다. 직물은 다수의 질량과 스프링의 조합으로 구성되어 변형 가능한 면을 이루게 되고, 면의 움직임은 운동법칙을 기반으로 수치적분을 통해 계산될 수 있다. 제안된 방법과 동일한 직물 구조에서 Explicit 오일러 방법은 Δt > 0.01 일 경우 불안정성 문제가 나타났으며, Implicit 오일러 방법은 Δt = 0.03 에서도 애니메이션이 생성되지만 많은 양의 선형 시스템을 계산해야 하는 단점을 가지고 있어서 실시간 처리에 부적합하다. 본 연구는 질량-스프링 모델에서 질점의 움직임을 계산하기 위하여 Δt = 0.03을 가지면서도 실시간 처리가 가능한 방법을 제안한다. A fuzzy inference technique for real-time textile animation without integration at textile model based Mass-Spring model is introduced. Until now many techniques have used the Mass-Spring model to describe elastically deformable objects like textile. A textile object is able to represent as a deformable surface composed of spring and masses, the movement of textile surface which is analysed through the numerical integration by the fundamental law of dynamics such as Hooke's law. However, the integration methods have 'instability problems' if the explicit Euler's method is applied or 'large amounts of calculation' if the implicit Euler's method is applied. A simple and fast animation technique for Mass-Spring model of a textile with fuzzy inference is proposed. The stabilized simulation result is obtained the state of each mass-point in real-time for the n of mass-points by a relatively simple calculation.
Recourse model을 활용한 수요 불확실성하의 추계적 판매생산 계획
황선민(Hwang Seon-Min),송상화(Song Sang-Hwa) 한국SCM학회 2015 한국SCM학회지 Vol.15 No.1
In this paper, we study a supply chain planning model to optimize sales and operation plan for N months with a case from a certain automobile production industry by worldwide supply. This contains a process for weekly, monthly production and procurement of materials and spare parts as well as sales allocation based on various scenarios which are drawn a conclusion from the sales mix for demand forecast. Particularly, since weekly production and sales allocation have been constrained by inventory quantity of materials and spare parts which are being shared per a product model, this paper focuses on deciding an appropriate purchase quantity for the materials and spare parts through mid-term sales and operation plan. The discrimination in this paper from the literatures is to present a flexible model design which can improve a firm’s entire profit as much as possible with integration of the entire supply chain although uncertain various forecast scenarios lead to any results, and to propose a planning framework to integrate with partial configurations from scientific Advanced Planning System so that all of the supply chain members can share company’s strategic management plan for procurement, marketing, sales, production and logistics.
Real-time collision detection for dynamic objects
오상영(Oh, Sang-Young),황선민(Hwang, Seon-Min) 한국산학기술학회 2008 한국산학기술학회논문지 Vol.9 No.3
본 연구의 목적은 컴퓨터 그래픽스 상에서 움직이는 다면체간의 충동을 탐지하는 데 있다. 지금까지 컴퓨터 그래픽스 분야에서 이와 관련된 많은 연구들이 수행되었으나 대부분 다이내믹한 환경에는 적절치 못했다. 본 연구를 통해 GJK 알고리즘을 기반으로 하여 움직이는 다면체간의 충돌 탐지에 적합한 방법을 제안하고자 한다. This paper studies a collision detection technique to dealing with moving polyhedra. Even though the problem is well-studied in computer graphics, the existing methods are inapplicable to highly dynamic environments. We use the GJK algorithm to determine collisions between convex objects. Also, our method is applied for moving objects.