• Proceedings of the Korean Society of Computer Information Conference
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• 2014.01a
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• pp.343-344
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• 2014

UHDTV와 UD 스마트폰의 보급을 앞두고 고해상도, 고화질의 영상에 대한 요구가 더욱 커지고 있다. 2013년 1월 국제표준으로 승인된 차세대 비디오 코덱인 HEVC는 현재 국제표준 코덱인 H.264/MPEG-4 AVC보다 50% 이상 높은 압축률을 지원하게 되어 향후 방송은 물론 스마트폰 등 디지털 영상의 새로운 혁신적인 기술이 될 것으로 보인다. 본 연구에서는 HEVC 기술의 동향과 전망에 대해 살펴본다.

• Journal of The Korean Association of Information Education
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• v.5 no.1
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• pp.133-142
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• 2001

The conception of the computer education should be paid attention to use, as it has meaning of the education using the computer and the education learning the computer. As a notion of the latter, the computer education points at survey of calculation and study which is related programing. Especially study of programing demands various understandings of external fields in programing like operating system and knowledge of hardware with complex courses like coding, compiling, debugging. Existing programming has set importance on mechanical memorizing and using programing grammar so that it has not been suitable for cultivating logical thoughts. So this paper intends to analyze simple game sources coded by C which is based of programing language to develop a fundamental insight.

• Proceedings of the Korean Information Science Society Conference
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• 2005.11a
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• pp.571-573
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• 2005

최근 모바일 폰, 휴대형 MP3 재생기, 휴대형 미디어 재생기, 휴대형 게임기 등 휴대형 디지털 가전 제품이 일반화되고 있으며 이들의 컴퓨팅 환경이 향상됨에 따라 휴대 가전의 사용 편의성 및 부가가치를 향상시키기 위해 UI가 하나의 큰 경쟁력 요소로 대두되고 있다. 그러나 현재까지는 휴대 단말기를 중심으로 사용자의 개인성을 강조하는 UI가 일부 채택되고 있으며 타 휴대 가전 분야에서는 최근에야 UI의 중요성이 부각되어 UI용 엔진들이 개발되고 있는 실정이다. 본 논문에서는 낮은 사양의 프로세서를 가지는 휴대형 가전에서 UI로 활용할 수 있는 비손실 영상 압축 시스템 개발에 대한 내용을 기술한다. 본 논문에서 제안된 기법은 현재 메모리 사용량 및 디코딩 속도에서 우수한 성능을 보이는 LZO 기법을 수정한 것으로 휴대 단말기의 프로세서에서 압축율 보다는 디코딩 속도에 최적화되었다.

• KSII Transactions on Internet and Information Systems (TIIS)
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• v.4 no.6
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• pp.1006-1022
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• 2010

In this paper, a cross-layer resource allocation mechanism is proposed for wireless multimedia service. In particular, a game theory based on quality of service (QoS) for multimedia users is introduced to deal with the fairness of network resource allocation in wireless networks. Moreover, the channel states of wireless users are additionally regarded under the cross-layer design in WiMAX environment. In details, the bargaining solution is adopted to discover the efficient and fair resource allocation strategy for multimedia service in considering QoS in the peak signal-to-noise ratio (PSNR) and the channel states in the carrier-to-interface ratio (CINR). The proposed mechanism is illustrated and evaluated by simulation results of transmitting video sequences in WiMAX environment.

• Proceedings of the Korean Society of Computer Information Conference
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• 2018.07a
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• pp.303-304
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• 2018

본 논문에서는 Unity게임엔진을 이용하여 만든 유아용 코딩게임의 사례와 결과물을 보인다. 대학에서 초, 중학교로 낮아져 가는 소프트웨어 교육의 연령대의 흐름에 맞춰 유아용 게임을 제작했다. 아이들에게 친근한 자동차게임의 모양으로 문제를 논리적으로 푸는 방법을 찾는 컴퓨팅적 사고를 하게끔 도와 스스로 문제를 해결하게 하고, 성취감을 얻게 해준다. 또 문제에 대한 정해진 답이 없고 자신만의 의견을 낼 수 있기 때문에 호기심과, 창의력의 증폭을 기대할 수 있다. 기본적으로 맵을 이용해 스토리 진행이 이루어지는 코딩게임의 알고리즘을 사용했으며, Unity2D 엔진을 이용해 유아용 블록코딩게임과 키보드게임을 제작했다. 자동차 모양의 객체를 목적지에 도달하게 할 방법을 아이들 스스로 생각하는 컴퓨팅적 사고를 돕는다.

• Proceedings of the Korean Society of Computer Information Conference
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• 2012.07a
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• pp.89-91
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• 2012

스마트폰과 HDTV의 보급에 따라 고해상도, 고화질의 영상에 대한 요구가 더욱 커지고 있다. 그에 발맞추어 관련 업체에서도 차세대 영상기기에 대한 개발에 박차를 가하고 있다. 또한 HDTV의 4배 이상의 해상도를 갖는 UHD에 대한 많은 기관들의 관심은 자연스레 표준화 단체들의 주목을 받게 만들었으며, 동영상 표준화 단체들도 높은 해상도, 고화질의 영상에 대한 압축 기술의 필요성을 공감하게 되었다. 현재 MPEG과 VCEG는 공동으로 차세대 비디오 코덱인 HEVC의 표준화작업이 진행 중에 있으며, UHD영상에서의 압축효율까지를 염두에 둔 코덱이 표준화될 예정이다. 본 연구에서는 현재까지의 HEVC 표준화 동향과 기술에 대해 살펴본다.

• Proceedings of the Korea Contents Association Conference
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• 2008.05a
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• pp.648-652
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• 2008

We all know *.x file is a bridge of the 3D model developer and the game developer. In today's 3D game programming, more and more advanced hardware support it to run, but we still need to consider the methods to generate the animations. 3D model maker is tired of rectifying the skeletal animations. If he mistakes one point in some one animation, this will lead to distortion in *.x file. Then the modification consumes long time. So finding a good blending method is the best choice for generating multiple skeletal animations. There were some methods for animations blending. In this paper, we could use 3D max or Maya to blend animations; and we could use *.x file and blend animations in coding. And we will use 3D max 8.0 to export the *.x file and present a better way to combine skeletal animations.

• Communications of Mathematical Education
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• v.36 no.3
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• pp.439-467
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• 2022

The future society requires not only knowledge but also various competencies, including creativity, cooperative spirit and integrated thinking. This research develops a program for integrating mathematics and information science to enhance important mathematical competencies such as problem-solving and communication. This program does not require much prior knowledge, can be motivated using everyday language and easy-to-access tools, and is based on creative problem-solving activities with multilateral cooperation. The usefulness and rigor of mathematics are emphasized as the number of participants increases in the activities, and theoretical principles stem from the matrix theory over finite fields. Moreover, the activity highlights a connection with error-correcting codes, an important topic in information science. We expect that the real-world contexts of this program contribute to enhancing mathematical communication competence and providing an opportunity to experience the values of mathematics and that this program to be accessible to teachers since coding is not included.

• The Journal of the Korea institute of electronic communication sciences
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• v.15 no.4
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• pp.651-658
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• 2020

In the fifth generation (5G) mobile networks, the interactive mobile game users have increased tremendously, which induces correlated information sources (CIS). One of the promising 5G technologies is non-orthogonal multiple access (NOMA). In NOMA, the users share the channel resources, so that CIS affect each user's bit-error rate (BER) performance, which is not the case for orthogonal multiple access (OMA). In this paper, we derive the optimal receiver for NOMA with CIS, and then investigate the impact of CIS on each user's BER performance.

• Fashion & Textile Research Journal
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• v.24 no.5
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• pp.519-529
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• 2022

This research analyzed the characteristics of Hanfu street snaps in the Chinese version of TikTok to determine the development and meaning of Hanfu. Based on grounded theory, this study selected 102 representative cases by sorting Hanfu street snaps on TikTok according to popularity. Subsequently, through open coding, the cases were organized and summarized into five main categories. The findings are as follows: 1) The national cultural pride has enabled a greater number of Hanfu fans and groups to upload short videos promoting the Hanfu movement on TikTok to expand the influence of the activities and popularize cultural knowledge. 2) The users attempted cross-cultural communication by participating in cultural festivals in Western countries wearing Hanfu. 3) The 'See now buy now' function of TikTok enables numerous Hanfu merchants to upload short videos about Hanfu products to promote their products and boost sales. 4) As 'gamification' affects everyday life, computer game enthusiasts among them wear Hanfu in the form of role-playing. 5)As a unique "meme" phenomenon on TikTok, wearing Hanfu to make interesting videos has also become a form of entertainment. Thus, although the characteristics of Hanfu street snaps on TikTok originated from the transmission of Hanfu culture, the culture has now been transformed through social media into symbolic consumption and play culture.