• Journal of Advanced Navigation Technology
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• v.17 no.3
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• pp.298-305
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• 2013

In this paper, we propose simple combining schemes for sensing ATSC digital television signals with spectral correlation density (SCD). The detection algorithms exploiting the cyclostationarity exhibited by the pilot of ATSC digital television signals usually use the SCD value at a given particular frequency. However, we found that non-zero SCDs are found to be distributed over a certain range of frequencies in multipath fading environment. To utilize a set of non-zero SCD values computed in the vicinity of the pilot location, we formulate a class of combining methods in analogy with the maximal ratio combining, the square law combining and the equal gain combining. We show that the proposed simple combining schemes improve the detection performance by 0.5~1.0dB under multipath fading environments.

• Broadcasting and Media Magazine
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• v.20 no.4
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• pp.58-66
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• 2015

본 논문에서는 ATSC3.0 차세대 하이브리드 방송시스템에서 사용하는 전송과 그에 따른 서비스 구성 방식에 대한 표준화 진행 현황과, 전송 방식에 따른 서비스의 구성 및 서비스 획득에 필요한 주요 기술적 요소들을 어떻게 시그널링 하는지에 대해 설명하고자 한다.

• Broadcasting and Media Magazine
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• v.25 no.3
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• pp.84-100
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• 2020

미디어 환경은 방송과 통신의 융합으로 모든 미디어는 언제(Anytime), 어디서나(Anywhere), 어느 단말기기(Anydevice)로도 원하는 콘텐츠를 자유롭게 이용할 수 있는 방향으로 발전하고 있다. 국내 미디어 정책의 주요 변화가 있었을 때는 1995년 케이블방송 도입, 2002년 위성방송 도입, 2008년 IPTV 도입, 2013년 OTT의 등장이다. 국내의 경우 2012년 지상파TV의 디지털 전환도 큰 정책변화 중의 하나였다. 그러나 국내 미디어 정책 및 제도는 미디어 환경변화와는 무관하게 여전히 매체별 접근에 기반한 미디어 산업 균형발전 논리를 추구하고 있다. 미디어 정책변화에 따른 지상파 차세대 TV방송(ATSC 3.0) 활성화에 대한 현안 사항을 쟁점별로 분석하여 정책방안을 제언하면 첫째, 아날로그 시대부터 유지되어온 국내 방송정책 및 법제의 플랫폼별 칸막이 규제를 풀어 지상파 플랫폼 규제를 완화하여야 한다. 둘째, 정부의 지상파 ATSC 3.0 부가서비스(이동)부터 규제 완화와 지원이 필요한 시점이다. 셋째, 지상파 차세대 ATSC 3.0에 대한 재난매체 지정이 필요하다. 마지막으로 기술중립적 서비스 허가체계인 Negative 규제방식을 도입하여 사업자의 기술결합과 기술혁신에 대한 유인 독려가 필요하다.

• Journal of Internet Computing and Services
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• v.20 no.2
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• pp.21-27
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• 2019

The terrestrial ATSC 3.0 broadcasting system, which is capable of converging broadcast and communication services, uses IP based technology for data transmission between broadcasting equipment. In addition, data transmission between broadcasting equipment uses IP-based technology like existing wired communication network, which has advantageous in terms of equipment construction and maintenance In case IP based data transmission technology is used, however, it may inevitably cause an error that a packet is lost during transmission depending on the network environments. In order to cope with a broadcasting accident caused by such a transmission error or a malfunction of a broadcasting apparatus, a broadcasting system is generally configured as a duplication, which can transmit a normal packet when various types of error may occur. By this reason, correction method of error packets and intelligent switching technology are essential. Therefore, in this paper, we propose a design and implementation of intelligent IP switch for Ensuring Reliability of ATSC 3.0 Broadcast Streams. The proposed intelligent IP consists of IP Stream Analysis Module, ALP Stream Analysis Module, STL Stream Analysis Module and SMPTE 2022-1 based FEC Encoding/Decoding Module.

• Journal of Broadcast Engineering
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• v.22 no.6
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• pp.829-849
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• 2017

Due to the large-scale TV display, the convergence of broadcasting and broadband, and the advancement of signal compression and transmission technology, terrestrial digital broadcasting has evolved into UHD broadcasting capable of providing simultaneous broadcasting of fixed UHD and mobile HD. The Korean standard for terrestrial UHDTV broadcasting is based on ATSC 3.0, the broadcasting standard of North America. The terrestrial UHDTV broadcasting standard chose that as a new AV codec standard, HEVC video codec which can compress with higher efficiency compared to AVC, and MPEG-H 3D audio codec for realistic audio. Also, DASH and MMT are adopted as transmission format instead of MPEG-2 TS to support broadband as well as broadcasting network, and in order to provide 4K UHD/mobile HD service simultaneously ROUTE multiplexing technology is applied. In this paper, we propose an audio/video encoder, which is required to provide HDR/WCG supported high quality video service, 10.2 channel/4 object supporting stereo sound service, fixed UHD and mobile HD simultaneous broadcasting service based on ATSC3.0, also we implemented the ATSC 3.0 LDM system for ROUTE/DASH packager, multiplexing system and physical layer transmission/reception, and verified the service ability by applying it to real time broadcast environment.

• ETRI Journal
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• v.34 no.1
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• pp.17-23
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• 2012

This paper analyzes the feasibility of a new 3DTV broadcasting service scenario via Advanced Television Systems Committee Mobile/Handheld (ATSC-M/H). We suggest a dual-channel system in which a left-view image is encoded by MPEG-2 with HD quality and a small-sized right-view image is encoded by AVC. Also, the left view is transmitted through ATSC main channel and the right view is transmitted through ATSC-M/H channel. Although the transport stream formats of two channels are different from each other, we demonstrate that it is possible for the ATSC 2.0 decoder to synchronize the display of the left and right views when both encoders use a common wall clock and time stamp. We also propose a program specific information descriptor which guarantees full compatibility with the conventional 2D HDTV and emerging mobile TV services. Finally, we provide the results of subjective visual quality assessment of the proposed system in support of its 3DTV service quality.

• Journal of Multimedia Information System
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• v.9 no.3
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• pp.227-232
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• 2022

Disasters are now becoming commonplace and especially the vulnerable group such as the disabled, the elderly, children and foreigners are in a state of overlapping disasters. In this situation, ATSC 3.0-based UHDTV disaster information service for the visually and hearing impaired has been developing. This study focuses on the demand data collected through in-depth interview with the impaired. The demand analysis data is very important to development process of technology. The results of the interview show that it is essential to link the UHDTV disaster signals with home-network, IoT, wearable devices, and various assistive devices for the impaired (hearing aid, smart light bulbs, warning light, etc.). In outdoor space, UHDTV disaster information must be connected to public display media, digital signage, kiosk, screens in bus or taxi. If communication aids for the visually and hearing impaired are equipped with a function that can transmit and receive disaster information, it will help to minimize disaster damage.

• Journal of Broadcast Engineering
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• v.8 no.2
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• pp.109-115
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• 2003

In this paper we propose an efficient method to broadcast digital television signals using Single Frequency Networks (SFNs) in the Advanced Television Systems Committee (ATSC) transmission systems. Since the proposed schemes to synchronize multiple transmitters minimize the changes from the conventional ATSC system, the hardware complexity for the changes is very low. Our simulation results show that the proposed scheme makes less than 0.1 dB degradation at the threshold of visibility (TOV： BER= 3$\times$$10^{-6}$) in the additive white Gaussian noise (AWGN) channel. It is possible to reduce the performance degradation by increasing an initialization period of the proposed scheme.

• Proceedings of the Korean Society of Broadcast Engineers Conference
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• 2017.06a
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• pp.139-142
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• 2017

지상파 방송 3사(KBS, MBC, SBS)는 2017년 5월 31일부터 지상파 UHD(Ultra High Definition Television) 본방송을 개시하였다. ATSC(Advanced Television Systems Committee) 3.0 표준방식으로 이루어진 세계 최초 지상파 UHD 본방송으로써, 국내뿐만 아니라 미국, 일본, 유럽의 DTV선진국에서도 많은 관심을 보이고 있다. 본 논문에서는 시험방송 기간에 방송사와 가전사가 공동으로 실시한 ATSC 3.0 기반 지상파 UHD 본방송을 위한 물리계층 필드테스트 결과에 대해 살펴보고자 한다.

• Proceedings of the Korean Society of Broadcast Engineers Conference
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• 2015.07a
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• pp.306-307
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• 2015

본 논문에서는 ATSC (Advanced Television Systems Committee) 3.0 시스템을 위한 LDM (Layered Division Multiplexing) 기술을 제안하고, 그 성능을 전산실험을 통해 분석한다. 제안된 LDM 시스템은 기존의 TDM (Time Division Multiplexing) / FDM (Frequency Division Multiplexing) 기술에 비해 약 3 에서 9 dB 의 성능 이득을 나타낸다.