• Broadcasting and Media Magazine
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• v.21 no.1
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• pp.13-32
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• 2016

지상파 UHD 방송이 2017년 2월 수도권을 시작으로 2021년까지 전국으로 확대될 예정이다. 본 고에서는 내년부터 시작될 UHD 방송에 대한 이해를 돕기 위해 UHD 영상 포맷을 UHD 영상 포맷 표준 현황을 통해 설명하고, 영상 포맷의 각 구성요소에 대한 화질과 실감 효과를 통해 UHD 영상의 실감 효과에 대해서 설명한다. 끝으로, UHD 영상 포맷과 관련된 이슈 현황과 향후 전망에 대해 설명한다.

• KSII Transactions on Internet and Information Systems (TIIS)
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• v.11 no.8
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• pp.4092-4104
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• 2017

In this paper, an efficient 4K and 8K UHD(Ultra High Definition) transmission scheme is proposed on the convergence networks with broadcasting and LTE(Long Term Evolution) by using CoMP(Coordinated Multi-Point). A video data is compressed and divided into BL(Base Layer), E(Enhanced layer)1, E2 and E3 by scalable HEVC(High Efficiency Video Coding). The divided layers can be combined by the scalable HEVC such as mobile HD, full HD, 4K and 8K UHD(Ultra High Definition). The divided layers are transmitted through the convergence networks with DVB-T2(Digital Video Broadcasting-$2^{nd}$ Generation Terrestrial) broadcasting system and LTE CoMP. This scheme transmits mobile HD and full HD layers through DVB-T2 broadcasting system by using M-PLP(Multiple-physical Layer Pipes), and adaptively transmits 4K or 8K UHD layer through LTE CoMP with MMT(MPEG Media Transport) server. An adaptive transmitting and receiving scheme in the LTE CoMP system provides 4K or 8K UHD layer to a user according to the user status. The proposed scheme is verified by showing the system-level simulation results which is better BER(bit-error-rate) performance than the conventional scheme. The results show that the proposed scheme provides the stable video contents to the user especially at the cell edge.

• Journal of Broadcast Engineering
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• v.22 no.5
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• pp.560-569
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• 2017

Recently as the studies on the combined delivery over multiple transmission media are progressed, studies using MMT which is next-generation multimedia transport standard are underway. They are about transmitting video data layered by SHVC through broadcasting network and communication network based on MMT. However, it is difficult to serve synchronized UHD contents in heterogeneous network environment based on MMT, because MMT standard doesn't fully specify the information to indicate the relationship between media. Also, the service that we want to propose in this paper is a broadcasting-based service such as terrestrial broadcasting. Therefore the user must be able to watch various contents continuously. However, the MMT PI(Presentation Information) that controls the spatio-temporal layout of a content has been described as providing only one content. In this paper, we propose the structure of MXD document and MMT PI to provide continuous UHD contents service based on heterogeneous network.

• Broadcasting and Media Magazine
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• v.23 no.2
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• pp.43-57
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• 2018

2018년 2월 우리나라는 평창 및 강릉 지역에서 동계올림픽을 개최하였다. 평창동계올림픽 기간을 활용하여 우리나라의 앞선 ICT 기술을 홍보하기 위해 5G, UHD, IoT를 주제로 ICT 홍보관, 5G 및 UHD 체험버스 등 다양한 행사를 마련하였다. 본 고에서는 지상파 UHD 방송 채널로부터 동계올림픽 경기 방송을 고정 환경에서의 UHD뿐만 아니라 이동 중 HD 방송을 동시에 시청할 수 있는 UHD 모바일 방송 시범서비스에 대한 현황과 시사점에 대해 논의하고자 한다.

• Journal of the Korean Institute of Illuminating and Electrical Installation Engineers
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• v.29 no.2
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• pp.8-18
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• 2015

This paper proposes a dimming method and a hybrid LED driving circuit suitable for the ultra high definition (UHD) broadcasting. There are major two problems during the dimming control for traditional LED broadcast lightings; one is a flicker that occurred when camera filming to these lightings, and the other is that linear control is impossible for LED luminous intensity under 10% due to LED electrical characteristics. The proposed dimming method and the driving circuit are designed to solve two problems simultaneously. For high level dimming control region from 10 to 100%, the analog control method was applied to the switching regulator constructed by MOSFET operated in the saturation region. For low level dimming control region under 10%, the fast PWM control method with the linear regulator constructed by MOSFET in the ohmic region was used. We verified experimentally that the dimming method is able to control the luminous intensity linearly from 1 to 100% and the flicker disappears on images taken by the charge coupled device (CCD) and the complementary metal oxide semiconductor (CMOS) cameras. Therefore, the proposed method is suitable for the UHD broadcasting.

• The Journal of the Korea Contents Association
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• v.21 no.12
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• pp.296-301
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• 2021

This study is a study dealing with the empirical test of standardized multimedia disaster warning broadcasting linked with the next-generation prediction and warning platform and the disaster warning additional data service of terrestrial UHD broadcasting. The next-generation prediction and warning platform used in the demonstration test complies with the CAP-based TTA standardization standard, and the UHD disaster warning additional data service complies with the AEAT standard. As a result of the experiment, when a standardized CAP disaster warning message is issued and delivered to a broadcasting company, a system was established so that it is automatically converted to AEAT, a UHD disaster warning additional data message, and transmitted. The receiver unit was configured by connecting a set-top capable of receiving disaster alert data and a TV with an HDMI cable. When a disaster is announced, the set-top displays the AEAT message on the TV broadcasting screen, customized to the priority of the disaster and the area where it is issued. In addition, incoming messages are displayed in a language suitable for user settings among 5 languages. Additional multimedia functions such as images and alarm sounds could also be linked. In particular, it was confirmed that the receiver message was displayed within 3 seconds of issuing the disaster alert, enabling prompt delivery of the disaster alert.

• Broadcasting and Media Magazine
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• v.19 no.2
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• pp.46-56
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• 2014

UHD(Ultra High Definition) 관련기술이 성숙되면서 최근 UHD 방송은 HD(High Definition) 방송 이후 차세대 실감 방송 서비스로 확고하게 자리를 잡아 가고 있다. 이러한 영향으로 UHDTV를 중심으로 UHD 방송장비의 상용화가 점차 확대되고 있고, 국내외 여러 방송사업자들은 서비스 상용화 준비를 서두르고 있다. CJ헬로비전을 포함한 국내 케이블 방송사들은 유일하게 UHD 방송 표준화를 조기에 완료하였고 이를 기반으로 상용 서비스를 준비해 왔기에 세계최초로 2014년 4월에 4K-UHD 방송을 상용화한다. 케이블 방송에서 UHD 방송의 조기 상용화와 표준화는 전송방식의 변경이나 네트워크에 대한 대규모 투자가 없이 UHD 방송을 쉽게 제공할 수 있는 구조이기 때문에 가능했다. UHD 방송은 방송산업 가치사슬의 전 부분에 걸쳐 영향을 주기 때문에 케이블의 4K-UHD 방송 상용화를 계기로 국내 방송산업의 활성화에 기여할 것이다. 본 고에서는 세계최초로 상용화 하는 CJ헬로비전의 케이블 4K-UHD 방송 서비스와 케이블 UHD 방송 표준에 대해서 알아본다.

• Journal of Digital Convergence
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• v.12 no.8
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• pp.271-282
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• 2014

The recent flow of broadcasting technology, HDTV and 3DTV are being followed to develop UHDTV. UHDTV has established itself as the new paradigm. In Korea, the 4K-UHDTV experimental terrestrial broadcasting and cable and satellite TV services are being carried out in the present. 4K-UHD content creation workflow to enable a systematic formulation is needed. In this study, Through expert opinion 4K-UHD production workflow to derive the important topics and Hierarchical analysis methods (AHP, Analytic Hierarchy Process) is applied to 4K-UHD content creation is important to consider the items were compared to each other. The upper layer has a content creation workflow planning side, the media file management side and operational aspects of the selection and production equipment were classified. In the lower layer, UHD STAFF roles between production and training, media management, selection and operation of the storage device was evaluated in a relatively important. In addition, real-time 4K-UHD suggested workflow for production.

• The Journal of the Korea Contents Association
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• v.19 no.11
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• pp.516-526
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• 2019

As with all narrative forms based on media, the narrative method of TV human documentary is closely related to the change of broadcasting environment. In 2017, the world's first terrestrial UHD broadcast was launched in Korea, and in September of that year, KBS broadcasted the UHD special documentary series. , made of UHD capable of ultra-high definition video and immersive audio, showed a narrative approach completely different from the existing TV human documentary. Instead of all-out narration, which was considered an essential element in the TV human documentary, it used the modest first-person narration of the characters, while actively using drones capable of various compositions to express the psychology of the characters in detail and enable viewers' immersion. In addition, the Montage editing technique, an editing method that has not been attempted in TV human documentaries, utilizes the narrative development method of 'showing' as a video without 'explaining' with narration. After , many similar narrative documentaries are broadcast, and the flow and direction of TV human documentaries are changing under UHD broadcasting environment.

• Journal of Digital Convergence
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• v.12 no.10
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• pp.21-34
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• 2014

The purpose of this paper is to examine how technological innovation and increasing competition affect the relationship among market players and what policy issues are emerging through the case of UHDTV. There emerges sharp conflicts among consumer-electronics companies, telcos, terrestrial broadcasting companies and pay-TV companies since they all have different perspectives and interests regarding the way UHDTV services are introduced in the competitive broadcasting market. Dualized governance structure leads to aggravating conflicts. While the case of UHDTV demonstrates clearly that technological innovation and more competition into the market create conflicts among these market players, it is well expected that we will see very often similar conflicts and policy chaos in this innovative and competitive broadcasting industry.