• International Journal of Computer Science & Network Security
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• v.21 no.8
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• pp.87-96
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• 2021

The demand for e-learning through video lectures is rapidly increasing due to its diverse advantages over the traditional learning methods. This led to massive volumes of web-based lecture videos. Indexing and retrieval of a lecture video or a lecture video topic has thus proved to be an exceptionally challenging problem. Many techniques listed by literature were either visual or audio based, but not both. Since the effects of both the visual and audio components are equally important for the content-based indexing and retrieval, the current work is focused on both these components. A framework for automatic topic-based indexing and search depending on the innate content of the lecture videos is presented. The text from the slides is extracted using the proposed Merged Bounding Box (MBB) text detector. The audio component text extraction is done using Google Speech Recognition (GSR) technology. This hybrid approach generates the indexing keywords from the merged transcripts of both the video and audio component extractors. The search within the indexed documents is optimized based on the Naïve Bayes (NB) Classification and K-Means Clustering models. This optimized search retrieves results by searching only the relevant document cluster in the predefined categories and not the whole lecture video corpus. The work is carried out on the dataset generated by assigning categories to the lecture video transcripts gathered from e-learning portals. The performance of search is assessed based on the accuracy and time taken. Further the improved accuracy of the proposed indexing technique is compared with the accepted chain indexing technique.

• Journal of Korea Society of Digital Industry and Information Management
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• v.5 no.1
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• pp.89-98
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• 2009

The existing mashup service providers have induced users to participate in their own made services and have grown their services by user participations and contributing contents. Recent services based on Web2.0 are called by 'Open (Content) Service' which means anyone can provide new services to the others without any of their own contents. But unfortunately the most of these days services are not opened. They just using mashups for increasing their service's traffics. We introduce the way to make a simple service to provide searching videos present it with extracted keyword from external content without our own contents at all. this show that how to combine the content with another contents or services.

• Proceedings of the Korean Information Science Society Conference
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• 2007.10c
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• pp.41-45
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• 2007

The rapid growing of video content production leads to the necessity of developing more complex indexing systems in order to efficiently allow searching, retrieval and presentation of the desired segments of videos. This paper presents a method for indexing soccer video through automatic extraction of information from internet. The proposed paper defines a metadata structure to formally represent the knowledge of soccer matches and provides an automatic method to extract semantic information from web-sites. This approach improves the capability to extract more reliable and richer semantic Information for soccer videos. Experimental results demonstrate that the proposed method provides an efficient performance.

• Journal of the Korean housing association
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• v.17 no.2
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• pp.97-106
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• 2006

The purpose of this study is to provide basic data for the planning of adolescents preferred space, and fur the purpose of the study analyzed the spaces made by them in the web site where 3-dimension space manipulating is possible and captured their consciousness of space. The study was to interview 60 adolescents in the web-site by video chatting and observation by video ethnography. The results are as follows. 1) Three-dimension space is where adolescents express their present preference for spaces of residence, leisure and outer activities, and where they reveal their desire to be realized in the future. 2) Adolescents foster friendship in the cyberspace, where they meet friends and enjoy talking and share their desire for space creation which is hardly come true in reality. 3) It is possible to grasp their latent preference of space, and actualization of the cyber preference would give them more satisfaction.

• Proceedings of the Korean Society of Computer Information Conference
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• 2021.07a
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• pp.109-110
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• 2021

본 논문에서는 웹툰(Webtoon)에서 파생되어 현재 온라인 동영상 플랫폼에서 활발하게 저작되고 있는 영상툰을 위한 영상툰 저작 시스템의 설계를 설명한다. 설명하는 저작 시스템은 웹을 기반으로 설계하여 저작자의 접근성을 높이고 웹에 접근할 수 있는 어느 장소에서든 저작이 가능하다는 이점으로 인해 편의성을 높였다. 또한, 많이 사용되고 있는 영상 저작 프로그램의 기본 형태를 따라 설계를 진행하여 처음 접하는 사용자들이 익숙하게 작업할 수 있도록 하여 적응을 위한 시간을 최소한으로 줄이고 단기간 내에 익숙하게 사용할 수 있도록 설계하였다. 설계된 시스템은 제안한대로 사용자가 익숙하게 사용할 수 있는 구조로 구성하였고, 향후에는 영상툰을 위한 다양한 효과들을 추가하여 시스템의 유용성 및 편의성을 높일 예정이다.

• The Journal of the Korea Contents Association
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• v.2 no.2
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• pp.17-26
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• 2002

In this paper, we suggest a method to acquire the moving object centered video by panning and tilting a camera automatically according to motion vectors calculated by detecting the motion of a moving object on video steam. We create a difference image by estimating the intensity difference at the grid points of neighboring frames. And we detect the motion using both horizontal projection histogram and vertical projection histogram and decide the center of motion part. Then we calculate a new direction and degree of the motion by comparing coordinates at the center of current motion and the center of previous motion. By controling the RCM using these Motion vectors, we can get video stream positioned unwire object on the center of video frame. Through the experiments, we could get a moving object centered video stream continuously arid monitor remotely by implementing sever/client architecture based on the web.

• Journal of Digital Convergence
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• v.16 no.2
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• pp.189-194
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• 2018

This study reflects the current trend of the blind hiring culture focused on job competency rather than education specification as government initiative. In order to overcome the limitation of the existing document-oriented online recruitment process, we proposed a system architecture design of video interview system. In addition, we have evaluated the effectiveness through the development of prototype and performance experiment based on it. The proposed online video interview system is designed to combine intelligent Web technology to enable customized job matching and distant job coaching. This system is designed to reduce recruitment cost and opportunity cost of job seekers. Based on results derived from this study, commercialization of the proposed video interview system can be expected to be an practical online recruitment solution for the job competency based employment.

• The KIPS Transactions:PartB
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• v.12B no.7 s.103
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• pp.775-782
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• 2005

In this paper, we propose multicast technique in order to reduce the required network bandwidth by n times, by merging the adjacent multicasts depending on the number of HENs (Head-End-Nodes) n that request the same video. Allowing new clients to immediately join an existing multicast through patching improves the efficiency of the multicast and offers services without any initial latency. A client might have to download data through two channels simultaneously, one for multicast and the other for patching. The more the frequency of requesting the video is, the higher the probability of caching it among HENs increases. Therefore, the requests for the cached video data can be served by HENs. Multicast from server is generated when the playback time exceeds the amount of cached video data. Since the interval of multicast can be dynamically expanded according to the popularity of videos, it can be reduced the server's workload and the network bandwidth. We perform simulations to compare its performance with that of conventional multicast. From simulation results, we confirm that the Proposed multicast technique offers substantially better performance.

• 한국HCI학회:학술대회논문집
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• 2009.02a
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• pp.1198-1207
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• 2009

최근 WEB 2.0 환경을 통해 사용자는 직접 응용 프로그램과 데이터를 이용하여 새로운 컨텐츠를 생산하는 주체로 변모하고 있다. 이러한 사용자의 자발적이고 적극적인 참여는 'UCC(사용자 제작 컨텐츠)'라고 불리는 새로운 문화 컨텐츠의 활성화로 이어지고 있다. 특히 글과 그림, 소리 등이 총체적으로 엮여 있는 동영상 UCC 의 경우, 이야기 구조나 캐릭터가 갖는 내용적인 특성과 제작자의 제작 취지를 훼손없이 살릴 수 있다는 제작의 특성으로 인해 WEB 2.0 환경에서 사용자의 참여가 더욱 두드러지고 있다. 본 연구에서 '사용자들이 열광하는 동영상 UCC 는 어떤 특징을 갖는가?' 라는 질문에 답하기 위해 동영상을 시청하는 사용자의 몰입과 창의성 평가를 진행하였고 이에 영향을 주는 요인으로 동영상 UCC 를 구성하는 내용적인 특성인 이야기의 내러티브와 캐릭터의 과장성을 살펴 보았다. 그리고 이 요인들의 상호작용에 영향을 주는 매개변인으로 제작자의 제작의도에 따른 컨텐츠의 특성을 선정하였다. 제작자의 의도에 따른 컨텐츠의 특성을 분류하기 위해 라캉의 주체이론과 퍼스의 기호학 이론을 바탕으로 모형을 제안하였으며 이를 검증하기 위해 UCC 사용자들을 대상으로 현재 서비스 중인 동영상 UCC 를 보여주고 설문을 실시하였다. 연구결과 제안하는 모형의 적용가능성이 입증되었으며 제작자의 의도에 따른 컨텐츠의 특성에 따라 이야기의 내러티브나 캐릭터의 과장성이 사용자의 몰입과 창의성평가에 미치는 영향력이 다르게 나타나는 것을 확인할 수 있었다.

• Journal of Digital Contents Society
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• v.11 no.2
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• pp.225-234
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• 2010

Web-based instruction is being developed as a new study model getting out of the traditional standardized education method. It is a new education tool which promotes learner-centered and cooperative study. Flash, as one of the most powerful web authoring tool can maximize the effectiveness of learning using computer graphic, animation, sounds and video. In this paper, we will look at developing and distributing education materials using flash and the efficient web-based instructions.