• Journal of KIISE:Computing Practices and Letters
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• v.11 no.2
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• pp.124-132
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• 2005

We propose a method using a transformation of an object and a scene tree in order to author MPEG-4 contents for mobile devices in this paper. The method transforms media objects in the scene into geometry objects in order to reduce initial loading time of the contents, and reduces an external form of each object in a scene of the content for presenting it efficiently on the small interface of mobile devices. Therefore, the contents for mobile devices are reconstructed by the method. An original object in the scene is presented on a mobile device when a user clicks a related geometry object. The method was applied to a conventional authoring tool, so we could find that the method showed an efficient presentation of MPEG-4 contents on mobile devices.

• Journal of Broadcast Engineering
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• v.11 no.3 s.32
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• pp.349-362
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• 2006

There are several data broadcasting standards that the developers should apply when develops any interactive digital TV contents. In Korea, we adopts ACAP(Advanced Common Application Platform) as terrestrial data broadcasting standard, MHP(Multimedia Home Platform) fur satellite data broadcasting and OCAP(OpenCable Application Platform) for cable data broadcasting. Therefore, content providers must develop different applications which suited for different standards - even if the application is exactly same. This is waste of time and energy. This paper suggests a solution to solve this problem among different broadcasting platforms - MHP, OCAP and ACAP. We compared these specifications, and found out what APIs are typically used far applications. Then we designed XML file structures that can be used to define contents of applications. We also implemented an authoring tool which automatically generates XML files by interaction with users. This paper also ascertains Xlet applications, produced by the authoring tool, works properly on each different data broadcasting standard - MHP, OCAP and ACAP.

• 한국HCI학회:학술대회논문집
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• 2009.02a
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• pp.363-367
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• 2009

We propose Cubical User Interface(CUI) for toy block composition in Augmented Reality. The creation of new object by composing virtual object is able to construct various AR contents effectively. However, existing GUI method requires learning time or is lacking of intuitiveness between act of user and offered interface. In case of AR interfaces, they mainly have been supported one handed operation and it did not consider composition property well. Therefore, the CUI provide tangible cube as the manipulation tool for virtual toy block composition in AR. The tangible cube which is attached multi-markers, magnets, and buttons supports free rotation, combination, and button input. Also, we propose two kinds of two-handed composing interactions based on CUI. First is Screw Driving(SD) method which is possible to free 3-D positioning and second is Block Assembly(BA) method which support visual guidance and is fast and intuitive. We expected that proposed interface can apply as the authoring system for content such as education, entertainment, Digilogbook.

• Proceedings of the KSPS conference
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• 2007.05a
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• pp.41-44
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• 2007

In this paper, we introduce a system in which car navigation scenario is plugged multimodal interface based on multimodal middleware. In map-based system, the combination of speech and pen input/output modalities can offer users better expressive power. To be able to achieve multimodal task in car environments, we have chosen SCXML(State Chart XML), a multimodal authoring language of W3C standard, to control modality components as XHTML, VoiceXML and GPS. In Network Manager, GPS signals from navigation software are converted to EMMA meta language, sent to MultiModal Interaction Runtime Framework(MMI). Not only does MMI handles GPS signals and a user's multimodal I/Os but also it combines them with information of device, user preference and reasoned RDF to give the user intelligent or personalized services. The self-simulation test has shown that middleware accomplish a navigational multimodal task over multiple users in car environments.

• Korean Journal of Computational Design and Engineering
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• v.13 no.2
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• pp.77-88
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• 2008

Nowadays personal users create a variety of multi-media contents and share them with others through various devices over the Internet since the concept of user created content (UCC) has been widely accepted as a new paradigm in today's multi-media market, which has broken the boundary of contents providers and consumers. This paradigm shift has also introduced a new business model that makes it possible for them to create their own multi-media contents for commercial purpose. This paper proposes a tangible virtual studio using augmented reality to author multi-media contents easily and intuitively for personal broadcasting and personal content generation. It provides a set of tangible interfaces and devices such as visual markers, cameras, movable and rotatable arms carrying cameras, and miniaturized set. They can offer an easy-to-use interface in an immersive environment and an easy switching mechanism between tangible environment and virtual environment. This paper also discusses how to remove inconsistency between real objects and virtual objects during the AR-enabled visualization with a context-adaptable tracking method. The context-adaptable tracking method not only adjusts the locations of invisible markers by interpolating the locations of existing reference markers, but also removes a jumping effect of movable virtual objects when their references are changed from one marker to another.

• The Transactions of the Korea Information Processing Society
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• v.6 no.4
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• pp.1022-1031
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• 1999

In this paper, we propose the framework of a visual language named VIOLA(VIsual Object-oriented Language for Multimedia Applications), which is developed for web authoring. VIOLA supports the user to construct HTML documents and CGI programs even if he/she doesn't know exact HTML tags and CGI programming. VIOLA, a user interface building part and a programming logic building part are combined by the data-flow model. the user interface building part provides direct manipulation and a WSIKWYG interface, and the program logic building part provides more intuitive interface by using predefined classes and the data-flow model. thus, even a novice user can construct sophisticated applications by simply moving or clicking the mouse. several classes which generate CGI codes are predefined, and they are represented with highly abstracted visual components, By reusing predefined classes, CGI codes are automatically generated. In VIOLA, all major steps in builidng generated wit HTML documents and Java CGI programs.

• Proceedings of the Korean Information Science Society Conference
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• 1998.10a
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• pp.647-649
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• 1998

최근 WWW상에서 VRML 기반의 3차원 가상공간 구현이 활발하게 진행되고 있다. 대부분의 시스템이 VRML기능의 한계로 인해 다수사용자의 참여와 사용자 상호작용 구현 기이 부족하다. 본 연구에서는 이러한 기능을 포함하는3차원 채팅시스템을 VRML과 Java를 이용하여 개발하였다. 다수 사용자 참여 기능은 Java를 이용하여 클라이언트/서버 시스템으로 구성하였으며 사용자 상호작용 기능은 3차원 가상공간을 걸어 다니는 효과 (walkthrough)를 제어하기 위한 인터페이스로서 EAI(External Authoring Interface)를 이용하여 구현하였다. 본 시스템에서 각 3차원 가상공간에서의 채팅 지원을 위해 여러개 서버를 둘 수 있도록 구성하여 사용자가 서버를 통해 채팅을 위한 가상공간을 추가 혹은 변경할 수 있도록 하였다.

• The Transactions of the Korea Information Processing Society
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• v.6 no.11S
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• pp.3243-3250
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• 1999

There are many problems to be satisfied the various commercial demand in the present VRML node, and the VRML-based system by the contact with other technology is burdened with the direct participation of developer related with it. In this study, remote control and monitoring system using EAI(External Authoring Interface) is reposed to overcome the limit of VRML. In other words, This study is about mechanism of interaction between control and monitoring subject in real world and object in virtual world mapped with it. Object oriented method by one to one mapping of the Java class which have VRML virtual world and the object control is proposed. Introduction method of video monitoring through method of image synthesis and the integrated development environment is described. Finally automobile-gate control system based on the development method of Internet virtual reality-based system which is proposed in this study is described.

• Proceedings of the Korean Information Science Society Conference
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• 2002.04b
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• pp.595-597
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• 2002

MPEG그룹은 미디어 객체를 시간과 3차원 공간상에 배치하여, 멀티미디어 컨텐츠를 표현하고, 사용자의 상호작용을 가능하게 하는 MFEG-4 System물 표준화하였으며, 다양한 전송계층 (File, TCF/IP, Broadcasting등)을 통합하여 처리할 수 있는 MPEG-4 System의 Multimedia Interface Framework)[3] 전송규약을 표준화하였다. 이 논문에서는 MPEG-4 System을 이용하여 비디오, 오디오, 그랙픽과 같은 다양한 미디어들을 결합하해주고 사용자와의 상호작용에 의한 실시간 표현을 가능하게 해주며 사용자가 MPEG-4 Sytem에 대해서 잘 알고 있지 않더라도 손쉽게 MPEG-4미디어 파일을 만들 수 있도록 해주는 저작툴을 제안한다 [1,3,5]

• Proceedings of the Korea Multimedia Society Conference
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• 2000.11a
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• pp.16-18
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• 2000

인터넷의 비약적인 발달로 인해 복잡해진 지식체계에 따른 다양해진 정보를 손쉽게 구할수 있게 되었으나, HTML(Hyper Text Markup Language)과 같은 정적인 텍스트 위주의 고정된 내용의 웹 페이지 저작으로는 멀티미디어에 대한 점차 증대되는 사용자의 요구를 수용할 수 없게 되었다. 시간에 기반을 둔 멀티미디어 객체를 동기화 하는 효과적인 프레젠테이션을 기술할 수 있는 SMIL(Synchronized Multimedia Integration Language)이 W3C(World Wide Web Consortium)에 의해 제안되었다. 이러한 SWIL은 선언적 마크업(Markup) 언어이므로 텍스트 편집기 등으로 쉽게 저작할 수 있으나, 태그(Tag)기반 언어이므로 태그를 암기하고 사용법을 숙지하여야만 효과적인 멀티미디어 프레젠테이션 제작이 가능하다. 이러한 문제점을 해결하기 위해 본 논문에서는 Java를 기반으로 하여 사용자 편의적인 GUI(Graphical User Interface)에 입각한 멀티미디어 데이터의 통합 및 동기화를 위한 SMIL 전용 저작도구의 구현 및 향후 개발 방향을 제시하였다.