• Proceedings of the Korean Information Science Society Conference
• /
• 2004.04a
• /
• pp.442-444
• /
• 2004

TV-Anytime은 차세대 디지털 방송을 위한 표준으로 기존의 방송시스템에서 방송 서비스 제공자가 사용자에게 방송 프로그램을 일방적으로 전송하는 것과는 달리 사용자가 다 채널 환경하에서 관련 메타데이터를 이용하여 채널을 직접 검색하고 검색한 정보를 저장하였다가 시간과 장소에 무관하게 사용하는 것을 목표로 한다 이러한 환경을 가능하게 하기 위하여 본 논문에서는 TV-Anytime 메타데이터를 저장 및 관리하고 검색하기 위한 시스템을 설계 및 구현한다. TV-Anytime기반 메타데이터 관리 시스템은 메타데이터의 특성을 파악하여 일반적인 메타데이터 관리 방법보다는 TV-Anytime 메타데이터에 특화된 방법으로 설계하고 구현하였다. 또한, 사용자에게 보다 풍부한 질의를 제공하기 위해서 MPEG7을 추가하여 내용기반 검색을 가능하도록 할 뿐만 아니라, XQuery를 검색을 위한 질의어로 사용하여 시스템간의 상호운용성을 보장하였다.

• Journal of the Korean Mathematical Society
• /
• v.55 no.3
• /
• pp.719-734
• /
• 2018

An image restoration problem with Poisson noise arises in many applications of medical imaging, astronomy, and microscopy. To overcome ill-posedness, Total Variation (TV) model is commonly used owing to edge preserving property. Since staircase artifacts are observed in restored smooth regions, higher-order TV regularization is introduced. However, sharpness of edges in the image is also attenuated. To compromise benefits of TV and higher-order TV, the weighted sum of the non-convex TV and non-convex higher order TV is used as a regularizer in the proposed variational model. The proposed model is non-convex and non-smooth, and so it is very challenging to solve the model. We propose an iterative reweighted algorithm with the proximal linearized alternating direction method of multipliers to solve the proposed model and study convergence properties of the algorithm.

• KSII Transactions on Internet and Information Systems (TIIS)
• /
• v.12 no.7
• /
• pp.3322-3337
• /
• 2018

Sleep mode detection is a significant power management and green computing feature. However, it is difficult for televisions and smart TVs to detect deactivation events because we can use these devices without the assistance of an input device. In this paper, we propose a robust method for smart TVs to detect deactivation events based on a visual combination of face and motion detection. The results of experiments conducted indicate that the proposed method significantly reduces incorrect face detection and human absence by means of motion detection. The results also show that the proposed method is robust and effective for smart TVs to reduce power consumption.

• Archives of design research
• /
• v.14 no.2
• /
• pp.127-136
• /
• 2001

The aim of this study is to examine and compare Koreans and Japanese creativities in advertising. It was to analyze empirically their creativities appreciated in 200 TV commercials broadcasted between 1992 and 1998. The content analysis, was a useful process, provided very important clues for comparative analysis. Many difference were found in the examined TV commercials in Korea and Japan. It showed major difference in ways in which the level of noise, the using of cuts, social space, camera work, etc. except preference of jingle, colors, elements of tradition. The most distinctive difference is that the Japanese TV commercials deal with atmosphere than the Korean commercials. This result may help to explain a common social phenomenon of not losing the original culture in each society, as a result of "international acculturation" and the subsequent "indigenization by adaptive change"

• Proceedings of the Korean Society of Broadcast Engineers Conference
• /
• 1999.06a
• /
• pp.151-158
• /
• 1999

This paper describes TVML (TV program Making Language) for automatically generating television programs from text-based script. This language describes the contents of a television program using expression with a high level of abstraction like“title #1”and“zoom-in”. The software used to read a script written in TVML and to automatically generate the program video and audio is called the TVML Player. The paper begins by describing TVML language specifications and the TVML Player. It then describes the“external control mode”of the TVML Player that can be used for applying TVML to interactive applications. Finally, it describes the TVML Editor, a user interface that we developed which enables users having no specialized knowledge of computer languages to make TVML scripts. In addition to its role as a television-program production tool. TVML is expected to have a wide range of applications in the network and multimedia fields.

• Proceedings of the Korean Information Science Society Conference
• /
• 2004.04b
• /
• pp.22-24
• /
• 2004

디지털 방송 환경의 발전은 방송 서비스 제공자가 방송 프로그램을 사용자에게 단방향으로 서비스를 제공하는 것뿐만 아니라 방송 서비스 제공자와 사용자 사이에 양방향의 액션을 통한 서비스 제공으로 형태가 변화하고 있다. 이러한 방송 서비스를 위한 규격을 만드는 국제표준화단체인 TV-Anytime 포럼에서는 차세대 디지털 방송용 메타데이터 국제 표준을 만드는 작업을 진행하고 있다. TV-Anytime 메타데이터를 실제의 응용에 적용하기 위해서는 대용량의 메타데이터를 저장하고 관리하는 것이 필수적인 요구 사항이다. 이에 TV-Anytime 메타데이터를 실제 디지털 방송 환경에서 효율적으로 관리할 수 있도록 메타데이터 저장 엔진을 설계 및 구연한다 또한 다른 시스템과의 시험을 통해 TV-Anytime 메타데이터 이외에도 XML 문서를 저장하고 관리하기 위한 다른 응용에서도 저장방법의 기준으로 상을 수 있는 자료가 될 것으로 기대된다.

• Journal of the Korean Society of Radiology
• /
• v.13 no.5
• /
• pp.765-771
• /
• 2019

Noise in skull X-ray imaging is inevitable, which reduces imaging quality and diagnostic accuracy and increases errors due to the nature of digital imaging devices. Increasing the dose can attenuate noise, but that could lead to big problems with higher exposure dose received by patients. Thus, noise reduction algorithms are actively being studied at low doses to solve dose problems and reduce noise at the same time. Wiener filter and median filter have been widely used, with the disadvantages of poor noise reduction efficiency and loss of much information about imaging boundary. The purpose of this study is to apply total variation (TV) algorithm to skull X-ray imaging that can compensate for the problems of previous noise reduction efficiency to assess quantitatively and compare them. For this study, skull X-ray imaging is obtained using various kVp and mAs using the skull phantom using the X-ray device of Siemens. In addition, contrast to noise ratio (CNR) and coefficient of variation (COV) are compared and measured when noisy image, median filter, Wiener filter and TV algorithm were applied to each phantom imaging. Experiments showed that when TV algorithms were applied, CNR and COV characteristics were excellent under all conditions. In conclusion, we've been able to see if we can use TV algorithm to improve image quality and CNR could be seen to increase due to the decrease in noise as the amount of increased mAs. On the other hand, COV decreased as the amount of increased mAs, and when kVp increased, noise was reduced and the transmittance was increased, so COV was reduced.

• Journal of Science of Art and Design
• /
• v.11
• /
• pp.37-49
• /
• 2007

TV animation has come a long way to this date since popular animation programs were aired on TV, such as 'Run Little Tiger', 'Run Honey', 'Hurry-Scurry Yeongsimi', beginning with 'Wandering Magpie' on KBS in 1978. However, problematic production process has resulted in the degradation of quality. Consequently, the dwindling viewing rate forced animation advertisers to leave, and the animation production shrank. Under those unfavorable circumstances, the government started to heed messages transmitted from animation producers and went ahead with the 'animation broadcasting quota' in a bid to help revitalize Korean animation industry. This study aimed to identify problems and set the direction for the animation industry by analyzing its fundamental and structural problems.

• KSII Transactions on Internet and Information Systems (TIIS)
• /
• v.9 no.12
• /
• pp.4835-4855
• /
• 2015

TV white space (TVWS) is showing promise to become the first widespread practical application of cognitive technology. In fact, regulators worldwide are beginning to allow access to the TV band for secondary users, on the provision that they access the geolocation database. Device-to-device (D2D) can improve the spectrum efficiency, but large-scale D2D communications that underlie TVWS may generate undesirable interference to TV receivers and cause severe mutual interference. In this paper, we use an established geolocation database to investigate the power allocation problem, in order to maximize the total sum throughput of D2D links in TVWS while guaranteeing the quality-of-service (QoS) requirement for both D2D links and TV receivers. Firstly, we formulate an optimization problem based on the system model, which is nonconvex and intractable. Secondly, we use an effective approach to convert the original problem into a series of convex problems and we solve these problems using interior point methods that have polynomial computational complexity. Additionally, we propose an iterative algorithm based on the barrier method to locate the optimal solution. Simulation results show that the proposed algorithm has strong performance with high approximation accuracy for both small and large dimensional problems, and it is superior to both the active set algorithm and genetic algorithm.

• Journal of the Ergonomics Society of Korea
• /
• v.27 no.4
• /
• pp.15-26
• /
• 2008

Recently, Internet Protocol TV technology has a latent power for searching information by using internet-connected interactive TV media. It is hard to browse and search web site conveniently since the visual and input devices are not sufficient for navigating through the websites. Zoomable user interface is a possible solution that may reduce users' task load and improve their performance. In this paper, we made three types of web browsers as scroll, physical zooming and semantic zooming type. Fifteen participants asked to do searching tasks and their task time, accuracy and subjective responses are recorded. In the result, though scroll type is evaluated more efficient than other types in task time and accuracy since participants are familiar with scroll type interface, semantic zooming type is highly rated in subjective responses such as perceived searching efficiency, satisfaction and joyfulness. This result implied semantic zooming is a possible solution which is improving user experience of searching websites using Internet Protocol TV.