• Journal of Korea Multimedia Society
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• v.9 no.5
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• pp.529-541
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• 2006

In this paper, we propose a semi-automatic segmentation method which can be used to generate video object plane (VOP) for object based coding scheme and multimedia authoring environment. Semi-automatic segmentation can be considered as a user-assisted segmentation technique. A user can initially mark objects of interest around the object boundaries and then the selected objects are continuously separated from the un selected areas through time evolution in the image sequences. The proposed segmentation method consists of two processing steps: partially manual intra-frame segmentation and fully automatic inter-frame segmentation. The intra-frame segmentation incorporates user-assistance to define the meaningful complete visual object of interest to be segmentation and decides precise object boundary. The inter-frame segmentation involves boundary and region tracking to obtain temporal coherence of moving object based on the object boundary information of previous frame. The proposed method shows stable and efficient results that could be suitable for many digital video applications such as multimedia contents authoring, content based coding and indexing. Based on this result, we have developed objects based video editing system with several convenient editing functions.

• Journal of the Korea Institute of Information and Communication Engineering
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• v.14 no.5
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• pp.1164-1170
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• 2010

IPTV hasn't fulfilled the expectations that it will substitute existing digital broadcasting service and serve new type of services such as interactive and multi-channels. Today's IPTV service just seems to change existing service platform to new one. In this situation, Open IPTV service has been on the rise, which make it possible for consumers to choice contents regardless of contents providers. However, the integration of variety service platforms such as rights protection solution is essential to provide Open IPTV service. In this paper, authoring and consuming system for package contents based on MPEG-21 Multimedia Framework which is developed for distributing media resources.

• Journal of Korea Multimedia Society
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• v.16 no.6
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• pp.720-734
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• 2013

In this paper, we suggest an augmented reality authoring tool system that users can easily make augmented reality contents using hand gesture and marker-based interaction methods. The previous augmented reality authoring tools are focused on augmenting a virtual object and to interact with this kind of augmented reality contents, user used the method utilizing marker or sensor. We want to solve this limited interaction method problem by applying marker based interaction method and gesture interaction method using depth sensing camera, Kinect. In this suggested system, user can easily develop simple form of marker based augmented reality contents through interface. Also, not just providing fragmentary contents, this system provides methods that user can actively interact with augmented reality contents. This research provides two interaction methods, one is marker based method using two markers and the other is utilizing marker occlusion. In addition, by recognizing and tracking user's bare hand, this system provides gesture interaction method which can zoom-in, zoom-out, move and rotate object. From heuristic evaluation about authoring tool and compared usability about marker and gesture interaction, this study confirmed a positive result.

• Journal of the Korean Institute of Telematics and Electronics B
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• v.33B no.3
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• pp.28-37
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• 1996

To reduce an authors burden in hypermedia system that allows non-sequential information the process of creating links must be easy. However, most of the conventional hypermedia systems possess two difficulties. First, the author must go through several troublesome process to create a single link. Secondly, it is not easy to create an anchor in text or other multimedia data. Therefore, in order to support effective construction of hypermedia system the editing environment must provide an easy method to create links. In this paper, to resolve the weaknesses of conventional hypermedia system as mentioned above, an editing tool is developed and implemented to easily create the links of multimedia data. There are three methods in creating links and a user can select a convenient method in given circumstances. And for teh efficient production of nodes composed of multimedia information, we provide an authoring environment to integrate and process those informations.

• Proceedings of the Korean Information Science Society Conference
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• 1999.10a
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• pp.433-435
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• 1999

The Synchronized Multimedia Integration Language (SMIL) is a recommendation from the W3C that makes authoring of TV-like multimedia presentations on the Web easier. It uses the eXtensible Markup Language (XML) to define a set of markup tags to synchronize the timing and positioning relationships between multimedia objects. We present the design and implementation of JAVA-based SMIL player, SSP(Sejong SMIL Player). SSP processes different types of media objects using multiple threads. Moreover, its cache engine detects the mediatype and allocates the proper cache memory for the corresponding media object.

• The Journal of the Korea Contents Association
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• v.5 no.2
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• pp.7-17
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• 2005

Flash contents for education can embody easily complex interactions with learner by splendid contents of various multimedia and animation. Moreover, they provide high class user interface and have advantages of inducing learner's interest and concentration. However, authoring flash content requires the skill to use the Flash tool, which is too difficult for professor to make the educational Flash contents. In this paper, we proposed the system that professors can make the Flash contents automatically by selecting something necessary and typing texts on the web. Also, the reusability and usability of the implemented system is analyzed in the viewpoint of professor by comparing with conventional method to reuse the Flash contents from various viewpoints.

• Journal of Korea Multimedia Society
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• v.2 no.3
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• pp.277-288
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• 1999

A distributed multimedia school system is developed for the multimedia classroom at high school and university. The system is designed and implemented for students to improve the learning efficiency through the personalized multimedia contents and pace of learning. The previously developed multimedia information retrieval systems have some limitations on being applied to the multimedia classroom: expensive cost per stream or poor retrieval quality inappropriate for education, unscalability of system and service, unfamiliar proprietary client environment, and difficulty for teachers to use the authoring tools and manage the authored teaching materials. The system we developed overcomes the above problems. It is so scalable as to be applicable not only to a segmented classroom but also to the world wide Internet. The stream server is one of the components of the system: stream servers clients, a service gateway system, and a authoring management system. This paper describes the design and implementation of the stream server. A single stream server can simultaneously playback the multimedia streams as many as clients at one classroom. This is achieved only by the software engine without any changes of the hardware architecture. The systematic coupling with other components gives the scalability of the system and the flexibility of services.

• Journal of Korea Multimedia Society
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• v.7 no.2
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• pp.251-263
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• 2004

The Synchronized Multimedia Integration Language (SMIL), recommended by the World Wide Web Consortium (W3C) in 1998, is an XML-based declarative language to synchronize and present multimedia documents. SMIL can create new multimedia data integrating various types of multimedia objects which exist separately such as text, video, graphics and audio. It can support synchronization of multimedia data which are limited in current HTML-based Web technology. For its popularity, it is required to develop a multimedia server guaranteeing Quality of Service (QoS), authoring tool and player. For developing a SMIL authoring tool and player, the technologies are essentially required to read and analyze a SMIL document and to play synchronized various types of media objects in a timeline. In this paper, we describe a design and implementation of an event processor which supports SMIL 2.0 timing model. Moreover, we also develop a SMIL 2.0 player using the proposed event processor. This will facilitate the play of SMIL contents, so that it can contribute to the prosperity of SMIL technology It is possible to reuse in various language profiles defined in the SMIL standard. This player is expected to be utilized in other standard integrating SMIL such as XHTML＋SMIL and SMIL Animation.

• ETRI Journal
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• v.35 no.6
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• pp.1048-1057
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• 2013

In recent years, augmented reality (AR) technologies have been the subject of great interest among many communities. In education applications, old-fashioned materials (or textbooks) are still used, despite remarkable AR developments in the industrial area. We present an AR system for education. Our system consists of an authoring tool that can be used to create educational content, a viewer that plays that content, and an engine to manage the tool and viewer. In our system, a marker unit recognizes a marker printed on a plane or a cubic plane by adaptively adjusting the threshold to have an excellent recognition rate in diverse environments and acquires corresponding data of the marker. Based on the system, we test 142 elementary school students for increased educational benefits using our system.

• Proceedings of the Korean Information Science Society Conference
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• 2001.04b
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• pp.391-393
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• 2001

본 논문에서는 디지털 멀티미디어 컨텐츠의 효과적인 제작을 위해 멀티미디어 컨텐츠가 다양한 형태의 타입으로 표현될 수 있도록 하는 MPEG-4 컨텐츠 타입 변환기의 설계 및 구현을 제시한다. MPEG-4 컨텐츠 타입 변환기는 멀티미디어 저작 도구인 멀티미디어 Authoring Tool을 위한 핵심 보조 기술이다. MPEG-4 컨텐츠 타입 변환기는 효과적 타입 변환을 위해 MPEG-4, TRIF 및 SMIL을 포함하는 중간포맷을 정의하여 이용한다. 즉, MPEG-4, TRIF 및 SMIL로 정의된 각각의 트리 형태의 데이터와 중간자적인 트리 형태의 중간 포맷 간에 양방향 변환을 가능하게 하여 손쉽게 다양한 타입으로의 변환을 가능하게 한다. 그리고, 각 트리 형태의 멀티미디어 데이터는 그에 해당되는 스트림의 형태로 트레이스 되어 출력되며, 실행 가능한 데이터를 생성하기 위해 Encode와 Mux 또는 파싱을 실행한다.