• 한방안이비인후피부과학회지
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• 제18권3호
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• pp.95-101
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• 2005

Objective: In children with acute otitis media, we investigated the relationship between state of tympanic membrane and treatment period by video otoscope. Methods: Ten children(6 boys, 4 girls) with acute otitis media were assigned to one of three groups. In the grade I, there were redness in the tympanic membrane. In the grade II, there were bulging, effusion with exudate, dark color in the tympanic membrane. In the grade III, there were effusion with purulent exudate or cholesteatoma with serous exudate. And we investigated the treatment period in each group. Results: Overall, the $mean{\pm}S.D.$ on the treatment period in the grade I was shorter than grade II. It was $12.6{\pm}5.18$ in the grade I versus $26{\pm}2.83$ in the grade II. That in the grade II was shorter than grade III. It was $26{\pm}2.83$ in the grade II versus $148{\pm}43.03$ in the grade III. Conclusions: Although we couldn't have enough cases in each group. we could predict the conclusion that there was the relationship between treatment period and state of tympanic membrane.

• 한국멀티미디어학회논문지
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• 제15권12호
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• pp.1464-1474
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• 2012

In this paper, we propose a QoS (Quality of Service)-aware and cooperative resource reservation scheme using cross-layer link adaptation for wireless high definition video transmission through UWB (Ultra Wide Band) network with D-MAC (Distributed Medium Access Control). A wireless high definition video transmission system usually requires stable high throughput even without line-of-sight, e.g., a destination device in another room separated by a wall. Since the WiMedia D-MAC supporting DRP (Distributed Reservation Protocol) scheme causes lots of DRP resource reservation conflicts due to failure of beacon detection in wireless channel environment, overall performances of the WiMedia D-MAC can be deteriorated. And the current WiMedia MAC standard has not considered QoS provisioning even though QoS parameters such as a range of service rates are provided to each traffic stream. Therefore, we propose Relay DRP protocol with QoS-based relay node selection criterion, which makes a relay path to avoid DRP resource reservation conflicts and guarantee QoS more stably through cross-layer link adaptation of cooperative relay transmission scheme and is compliant with the current WiMedia D-MAC protocol. Simulation results demonstrate performance improvements of the proposed method for throughput and QoS provisioning.

• 방송공학회논문지
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• 제14권6호
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• pp.703-720
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• 2009

본 논문에서는 3D 컨텐츠 서비스에 대한 사용자의 욕구를 만족시킴과 동시에 미래 컴퓨팅 환경에 적합한 새로운 동영상 코딩 방법으로서 실감형 다시점 스케일러블 비디오 코딩 방법을 제안하였다. 미래의 비디오 코딩 방법은 스테레오 스코픽 또는 다시점 비디오를 통하여 삼차원 실감형 입체영상을 사용자로 하여금 느끼게 하는 실감형 서비스를 지원함과 동시에 다양한 통신환경 및 다양한 종류의 단말을 통합적으로 지원하기 위한 'One-source Multi-use'를 달성할 수 있어야 한다. 지금까지 2차원 디스플레이만을 지원하는 동영상 코딩 방법과는 다르게 본 논문에서 제안하는 실감형 다시점 스케일러블 비디오 코딩 방법은 그러한 실감 서비스를 지원할 수 있는 방법이다. 제안된 코딩 방법은 다시점 비디오 코딩 방법과 스케일러블 비디오 코딩 방법의 기능을 통합하는 방향으로 설계되고 구현된 후 성능 평가를 통해 실제 3D 서비스에서의 응용 가능성을 살펴보았다. 성능 평가를 통해 본 논문에서 제안하는 코딩 구조가 코딩 효율을 효율적으로 유지하면서 시점간의 랜덤 액세스 성능을 크게 높여 주는 것을 확인할 수 있었다.

• 한국방송∙미디어공학회:학술대회논문집
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• 한국방송공학회 2009년도 IWAIT
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• pp.267-272
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• 2009

Video digests provide an effective way of confirming a video content rapidly due to their very compact form. By watching a digest, users can easily check whether a specific content is worth seeing in full. The impression created by the digest greatly influences the user's choice in selecting video contents. We propose a novel method of automatic digest creation that evokes a joyful impression through the created digest by exploiting smile/laughter facial expressions as emotional cues of joy from video. We assume that a digest presenting smiling/laughing faces appeals to the user since he/she is assured that the smile/laughter expression is caused by joyful events inside the video. For detecting smile/laughter faces we have developed a neural network based method for classifying facial expressions. Video segmentation is performed by automatic shot detection. For creating joyful digests, appropriate shots are automatically selected by shot ranking based on the smile/laughter detection result. We report the results of user trials conducted for assessing the visual impression with automatically created 'joyful' digests produced by our system. The results show that users tend to prefer emotional digests containing laughter faces. This result suggests that the attractiveness of automatically created video digests can be improved by extracting emotional cues of the contents through automatic facial expression analysis as proposed in this paper.

• 한국콘텐츠학회논문지
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• 제12권2호
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• pp.173-181
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• 2012

교육현장에서 영상물 콘텐츠를 활용한 교육이 갈수록 그 중요성을 얻고 있다. 본 연구는 대학생들이 영상물 활용교육의 목적을 어떻게 인식하는지 또 어떠한 방식의 영상물 콘텐츠 활용교육을 중요하게 생각하는지 그리고 영상 콘텐츠 활용교육과 논리적 능력향상은 어떤 상관관계를 갖는다고 인식하는지에 대하여 조사했다. 대학생들을 심층 인터뷰한 결과 영상 콘텐츠는 강의내용의 이해를 위한 매력적인 교수법의 하나로 인식되었으며 비록 간접적이기는 하지만 언론 현장의 생생한 현상들과 실제 사례들을 학습할 수 있는 좋은 기회를 제공해준다고 인식하고 있다. 뿐만 아니라 영상 콘텐츠 활용은 학생들의 논리적 능력을 제고시킬 수 있는 매우 효과적인 학습방법이라고 인식하는 것으로 분석되었다.

• 한국정보통신학회논문지
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• 제23권9호
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• pp.1096-1103
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• 2019

오늘날 정보통신기술의 발전으로 인해 디지털 영상 매체의 영향력은 점차 커지고 있으며, 청소년들의 대부분이 스마트폰과 컴퓨터를 이용하여 수많은 영상 콘텐츠를 소비하고 있다. 또한 청소년들은 이러한 영상 콘텐츠 소비하는 데에만 그치지 않고 직접 영상을 촬영하고 편집하여 유튜브(YouTube)나 비메오(Vimeo) 등의 매체에 본인이 만든 영상을 업로드하기도 한다. 이러한 현상에서 알 수 있듯이 영상 미디어를 쓰고, 읽고, 표현하는 등의 다양한 환경에서 영상을 활용하고 표현하는 미디어 교육은 매우 중요하다고 할 수 있다. 현재 미디어 교육은 발전된 디지털 기기와 영상 콘텐츠 제작 소프트웨어의 활용에 대한 교육 없이는 논할 수 없게 되었다. 본 연구는 영상 콘텐츠 제작 교육의 관점에서 미디어 교육을 다룬다. 이를 위해 비선형 편집 시스템을 중심으로 한 영상 콘텐츠 제작 과정을 통하여 학습할 수 있는 미디어 교육 방법에 대하여 논의 한다.

• 한국HCI학회:학술대회논문집
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• 한국HCI학회 2008년도 학술대회 2부
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• pp.115-120
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• 2008

본 논문은 하나의 미디어아트 작품에 대한 분석과 구현된 기술을 제공한다 3차원 그래픽 기술을 이용하여 다중 동영상 플레이어를 구현하였으며, 모든 동영상은 상호 연동되어 동작한다 컴퓨터의 소프트웨어로 구현된 동영상 플레이어에 관객이 참여하여 관객 스스로 감성적 자극을 얻을 수 있도록 구상하였다. 각 플레이어에 인간의 희로애락을 표현하며 특정화면에 대한 경험의 공감을 표현한다. 시스템의 성능에 따라 N2개 플레이어가 증가될 수 있으며, 더욱 많은 동영상간의 복합적인 연계를 통해 예술적 메시지를 전달할 수 있을 것으로 생각한다.

• 한국컴퓨터정보학회논문지
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• 제22권8호
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• pp.107-112
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• 2017

In this paper, I studied several universities which are especially famous for video and media fields in the United States to develop our international competitiveness. I selected the outstanding US universities and researched the various indexes of corresponding department, internship program and other activities related with company. Then, analyzed the research results and compared with the department of Video Broadcasting at the K women's university in our country. As a result, the retention rate and the graduate rate of the 4-years universities(bachelor's degree) are very higher than the 2-years associated degree among the US universities. On the other hand, although the department of Video Broadcasting at the K women's university is the associated degree course, it shows up the highest the retention rate and the graduate rate than the US universities. Therefore, we are able to recognize that K Women's University has managed its students well. However, the employment rate of the K Women's University was poor than the US universities due to the lack of the internship programs, other activities supported by companies and the career service center.

• International Journal of Internet, Broadcasting and Communication
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• 제7권1호
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• pp.10-14
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• 2015

Video Content owners seek to squeeze the maximum amount of revenue from their assets via distribution into more territories. Digital Cinema Package(DCP), trusted solution to distribute protected content to theaters, caters to relatively small user base, which limits revenue. With the growth of the Internet & other digital media, the economics of media content has changed dramatically. Security remains main concern to deliver content to millions of consumers using intelligent digital display devices like Tablets, Smartphones, Smart TVs, Desktop & Laptop. By making the video content available to this segment securely, content owners will benefit from increased revenue. Through this paper we propose Open Source HomeDCP model to distribute the content to home users for offline viewing. We propose to include other open source CODEC than JPEG2000/MPEG2, which are specifically designed for theatrical performance. Final image size will be further reduced considering the display device resolution where video will be finally played. Key Delivery Message(KDM) system to be altered to suit new devices. This will be a big boost to Content Economy as content owners would be able to distribute the content securely to the wider audience & ensure more revenue.

• 한국조경학회지
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• 제26권3호
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• pp.312-320
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• 1998

The purpose of this study is to investigate and compare the validity of various visual simulation methods with or without sounds and videos of the landscapes The landscape evaluation through such media as color slide, color slide with sounds, video and video without sounds are compared with on-site evaluaton of the landscape. The results are as follows : ·Video can generally convey the feelings for the real landscapes better than traditonal mathod, i.e., slide without sounds. ·When the sources of sounds are dominant in the view, there are great differences in responses among 4 different media and video can convey the feelings for real landscapes on site most successfully. ·There are slight differences by landscape types ; in mixed landscapes, there are higher correlations between the on-site estimaton and estimations through media ; in natural landscapes, video can reflect the feelings for real landscapes on site better. ·There is little difference between two shooting methods, fixed shot and pan shot. These results suggest that traditional visual simulation, with slides or photographs, could not reflect the real landscapes in certain situations and the visual simulation method with sounds and videos should be used in such situatios to represent the real landscape better. Especially, when the whole and comprehensive evaluatio of the landscape properties is important, the visual simulation with sounds and videos should be used. And simulation techniques with sounds and videos should be further developed for practial applications.