• The Journal of Korean Institute of Electromagnetic Engineering and Science
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• v.19 no.12
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• pp.1470-1481
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• 2008

A demand for spectrum resources, especially in the low frequency bands, is ever increasing with the development of mobile telecommunications and so is their economic value as other national resources. Also, development in mobile broadband require more bandwidth with excellent propagation characteristics, such as those frequencies in the 700/800/900 MHz bands. As a way to enhance the economic efficiency of using spectrum resources, many countries including the U.S., the U.K. and Japan, have recently focused on the refarming plan of the low frequency bands according to the transition from analogue to digital TV. By the way, as a result of WRC-07, those parts of the band $698{\sim}960\;MHz$ in Region 2 and the band $790{\sim}960\;MHz$ in Regions 1 and 3 which are allocated to the mobile service on a primary basis are identified for use by administrations wishing to implement International Mobile Telecommunications (IMT). Therefore, after analogue to digital television switchover, some administrations may decide to use all or parts of the band $698{\sim}806/862\;MHz$ for other services to which the band is allocated on a primary basis, in particular the mobile service for the implementation of IMT, while in other countries the broadcasting service will continue to operate in that band. And to conclude, bands already identified for IMT-2000 will also be able to be used for IMT. This work will help establish a policy direction for spectrum refarming in the low frequency bands in Korea(Rep. of).

• Proceedings of the IEEK Conference
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• 2003.07e
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• pp.1779-1782
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• 2003

본 논문에서는 새로운 색역폭(color gamut) 매핑 방법을 이용하여 디지털 TV 디스플레이 장치의 화질을 개선하는 방법을 제안하였다. 기존에 실시간 적응이 어렵던 색역폭 매핑 방법을 실시간으로 처리하기 위한 하드웨어 구조를 제안하였으며 이를 통하여 수 나노 초 단위의 처리 속도가 필요한 디지털 TV 의 디스플레이 장치에 성공적으로 적용이 가능하였다. 또한 제안된 하드웨어 구조는 필요에 따라 색역폭 매핑 해상도의 조절이 가능하여 해상도 및 하드웨어 구현 비용을 적절히 조절할 수 있는 장점이 있다.

• Journal of Korea Technology Innovation Society
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• v.10 no.1
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• pp.164-181
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• 2007

This paper empirically analyzes determinants of DTV (Digital Television) adoption in household survey data with IT-related household demand characteristics. To this purpose, we conducted a survey for the adoption of DTV to 1,000 households nationwide. In the questionnaire, various questions asking socio-economics characteristics such as age, education, income were included. Also, status of adoption and usage of IT services such as paid broadcasting, internet, and DVD were asked. To analyze the determinants of intention of purchasing, decision of purchasing, and the timing of purchasing DTV, we adopted the ordered logit, binary logit and multinomial legit models. When there is an order among groups, ordered logit was employed and when there is no orders among groups, multinomial logit was emplyed for the estimation. It is found that when conditions of other explanatory variable are constant, the more educated household heads are, the more probable they become early adopters of DTV. It is also found that other conditions being constant, the income level of households and IT-related household demand characteristics are very important factors affecting DTV adoption. Since the likelihood of purchasing DTV is much higher for those who know the government policy of analog broadcasting termination schedule than others who do not know, dissemination of the Korean government's digital broadcasting policy will affect significantly the adoption of DTV. And policy with various incentives ought to be employed to accelerate DTV adoption, because households with the older TV sets are more likely to purchase DTV. It is suggested that the Korean government should develop policy to connect both DBS (Direct Broadcast Satellite) and DTV since DBS subscribers are more likely to be an early adopter than non-subscribers.

• The Journal of Korean Institute of Communications and Information Sciences
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• v.35 no.7A
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• pp.725-730
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• 2010

Preparing the conversion to the digital broadcasting system, we are deciding broadcasting network plan and interference protection area, using the measured receiving electric field level from the digital broadcasting station. However, the essential researches are needed about a receiving electric field level, because a digital TV (DTV) broadcasting receiver has been improved and an actual receiving environment should be considered. In this paper, the measured data were classified with domestic terrain of line of sight (LOS) and those of non-LOS, and effective receiving electric field level was proposed based on the LOS data. It is known that receiving electric field-level of 48 ㏈uV/m or more should be required for receiving rate of 90% and 50 ㏈uV/m for that of 95%, on the basis of the information of domestic terrain LOS.

• Broadcasting and Media Magazine
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• v.3 no.3
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• pp.11-23
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• 1998

디지털 기술을 중심으로 한 급속한 기술혁신과 정보통신 시장의 대내 \ulcorner외적 개방으로 방송과 통신 등 미디어간의 융합화가 가속되고 미국, 영국, 일본 등 선진국들이 지상파 디지털TV 방송실시 계획을 발표 함으로서 방송의 디지털화는 기정 사실화 되었다. 또한 각국은 방송시장의 개방에 대응하여 방송산업의 경쟁력강화 및 이를 통한 문화적 정체성 확보에 고심하고 있다. 이러한 방송환경의 급속한 변화에 대응하여 21세기 멀티미디어/정보화 시대에 국내 방송산업의 활성화 및 국제경쟁력 강화를 위해서 국내 지상파 디지털TV 방송의 전환계획은 매우 중요하며 상당한 의미를 갖는다. 따라서 국내 지상파 방송의 디지털 전환계획을 수립하기 위해 기본적인 전환 일정, 디지털TV 방송 및 동시방송과 관련된 세부 전환 일정, 유료방송 관련 사항, 주파수 활용 계획, 전환비용, 산업체의 기술확보 계획, 디지털방송 관련 법/제도 등 주요 사항들을 여러 분야에서 연구하여 향후 추진방향을 제시하고자 각 관련기관들이 노력하고 있다. 본 고에서는 국내 지상파 방송의 디지털 전환과 관련된 주요 사항들에 대한 기본 배경 및 환경들을 중심으로 서술하고, 이를 기초로 관련 기관들로부터 의견을 수집하고, 외국의 사례를 참조하여 수행된 주요 사항들을 간략히 정리하였다.

• TTA Journal
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• s.51
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• pp.94-96
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• 1997

일본의 주요 연구소들은 디지털 지상방송 시스템의 개발을 위하여 변조방식을 중점으로 기본적인 현장시험을 공동으로 시작할 예정이다. 이 현장시험은 디지털 지상 TV방송의 조기도입을 촉진하도록 1998년까지 잠정적인 방송시스템의 설정을 목표로 진행되고 있다.

• Journal of Digital Convergence
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• v.11 no.5
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• pp.299-305
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• 2013

Internet Data is hugely increased for high quality multimedia services and the related techniques is also developed rapidly. This paper is aimed to develop integrated internet data and Digital-Television receiving system with high performance and optimization, which is obtained by one-board integration with load control. It is applicable to various devices like computer, set-top box, home multimedia gateway etc. The performance is proved by evaluation test. It shows that the developed device can be TV tuner and internet AP for more robust multimedia services.

• 한국HCI학회:학술대회논문집
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• 2008.02a
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• pp.236-239
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• 2008

In this paper, we developed digital TV interactive game using mobile device. This enables a TV viewer to participate in the game using mobile devices. Recently, advanced interface is adopted in the mobile devices, especially touchpad type interface is favorable. Such type interface has the advantage of more familiar interface for users, and the user can input various type of action. Using a mobile phone enables many users can participate in the TV game, and provides a private screen. In this paper, we describe contributions of the program in detail, and we present the architecture and a demonstration of the proposed program in a similar broadcasting environment.

• 전기의세계
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• v.45 no.6
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• pp.28-33
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• 1996

본 논문에서는 디지털 TV의 발전과정과 관련 기술들을 간략히 살펴보고자 한다.

• The KIPS Transactions:PartA
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• v.10A no.6
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• pp.595-604
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• 2003

A Digital TV system is necessary for data Processing as well as video and audio processing. Especially in the case of interactive broadcasting, it should manage returning channel created by the Internet, PSTN, and so on. Because of many functionalities and multitasking jobs, it needs an Operating System. Embedded Linux as open source program can increase a cost effectiveness in market and has many advantages - reusable device drivers and application programs, more convenient developing environment using shell and file system, and easy problem resolution within Open Source Community. In this paper, we modified Embedded Linux kernel and cross developing environment for a big-endian system, redesigned devices for kernel execution, and configured system memory map in order to load a linux kernel. Also we developed an device driver for entire system control.