• Title/Summary/Keyword: Next generation DTV

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A Study on 700MHz Spectrum Utilization for the Improvement of Terrestrial Signal Reception and Next Generation Broadcasting (지상파방송 직접수신 환경 개선과 차세대방송을 위한 700MHz대역 주파수 활용 연구)

  • Park, Sung-Kyu;Lee, Chang-Hyung;Park, Goo-Man
    • Journal of Broadcast Engineering
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    • v.17 no.2
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    • pp.237-251
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    • 2012
  • Recently, the direct terrestrial broadcasting reception has been reduced rapidly and not been improved even in digital broadcast environment. The distribution plan of 700MHz frequency band(Ch.52~69) will make the problem worse because the spectrum might be allocated to mobile communication use. In this paper, we investigated the efficient frequency usage for DTV signal reception improvement and next generation broadcasting. The frequency amount required for reception improvement and for next generation broadcasting service is presented. We estimated the beneficial effect when the spectrum(108MHz Frequency Width) is used for SFN transmission technology, UHDTV and Full-HD 3DTV.

Improved Hybrid MIMO Scheme for Next Generation Communication System (차세대 통신 시스템을 위한 향상된 하이브리드 MIMO 기법)

  • Jo, Bong-Gyun;Han, Dong-Seog
    • Journal of Broadcast Engineering
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    • v.16 no.6
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    • pp.969-976
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    • 2011
  • In this paper, a terrestrial transmission system is proposed for the next generation digital television (DTV) system by applying a hybrid multi-input multi-output (MIMO) technology based on linear dispersion codes (LDCs). The digital video broadcasting-2nd generation terrestrial (DVB-T2) system adopted a space time block code (STBC) for improving receive performance. However, the data rate of STBC is not increased in proportion to the transmitter. The hybrid STBC scheme utilizes several STBC transmission blocks for increasing data rate. It is possible to increase the data rate and performance in the receiver by utilizing LDC. The performances of the proposed and conventional hybrid STBC schemes are evaluated through computer simulations.

Real-Time 2D-to-3D Conversion for 3DTV using Time-Coherent Depth-Map Generation Method

  • Nam, Seung-Woo;Kim, Hye-Sun;Ban, Yun-Ji;Chien, Sung-Il
    • International Journal of Contents
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    • v.10 no.3
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    • pp.9-16
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    • 2014
  • Depth-image-based rendering is generally used in real-time 2D-to-3D conversion for 3DTV. However, inaccurate depth maps cause flickering issues between image frames in a video sequence, resulting in eye fatigue while viewing 3DTV. To resolve this flickering issue, we propose a new 2D-to-3D conversion scheme based on fast and robust depth-map generation from a 2D video sequence. The proposed depth-map generation algorithm divides an input video sequence into several cuts using a color histogram. The initial depth of each cut is assigned based on a hypothesized depth-gradient model. The initial depth map of the current frame is refined using color and motion information. Thereafter, the depth map of the next frame is updated using the difference image to reduce depth flickering. The experimental results confirm that the proposed scheme performs real-time 2D-to-3D conversions effectively and reduces human eye fatigue.

Audio Format Comparative Study and Suggestion for Next Generation DTV (차세대 디지털 TV 방송을 위한 오디오 규격 비교 분석 및 제언)

  • Lee, Jae-Hong
    • The Journal of the Acoustical Society of Korea
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    • v.30 no.6
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    • pp.337-343
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    • 2011
  • With commencing trial 3D digital broadcasting, the studies on next generation digital broadcasting technology for coming UHDTV era is being actively progressing. In this paper, I propose surround audio formats for next-generation digital TV broadcasting, along with comparative study of major surround audio formats in use or under development. I did comparative study on current major competing surround formats such as Dolby True HD and DTS HD MA, along with NHK proposed 22.2 channel surround format for UHDTV system. Upon this comparative study and our housing situation consideration, I propose lossy compression 3D surround 7.1 channel surround format along with loosless 2.0 and 4.0 hi-fi format as next generation digital TV broadcasting standard. In lieu with this, I also propose transmitting binaural 2 channel audio data as sub-audio. It will give holographic sound experience when properly processed with individual HRTF (Head Related Transfer Function) with headphone. The table for data rate of each proposed audio format is also presented.

Fast Generation Methods for Computer-Generated Hologram Using a Modified Recursive Addition Algorithm

  • Choi, Hyun-Jun
    • Journal of information and communication convergence engineering
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    • v.11 no.4
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    • pp.282-287
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    • 2013
  • A real-time digital holographic display is the core technology for the next-generation 3DTV. Holographic display requires a considerably large amount of calculation. If generating a large number of digital holograms is intended, the amount of calculation and the time required increase exponentially. This is a significant obstacle in a real-time hologram service. This paper proposes an algorithm that increases the speed of generating a Fresnel hologram by using a recursive addition operation covering the entire coordinate array of a digital hologram. The 3D object designed to calculate the digital hologram uses a depth-map image produced by computer graphics. The proposed algorithm is a technique that performs the computer-generated holography (CGH) operation with only recursive addition of all of the hologram's coordinates by analyzing the regularity between the 3D object and the digital hologram coordinates. The experimental results show that the proposed algorithm increases the operation speed by 70% over the technique using the conventional CGH equation and by more than 30% over the previously proposed recursive technique.

Study on the Effect of Industry by Using the Next Generation Broadcasting on 700MHz Band Frequency (700MHz 대역 주파수의 차세대방송 이용과 산업효과 연구)

  • Park, Sung Kyu;Ahn, Seong_Je;Park, Jong Won;Kim, Gwangho;Park, Gooman
    • Proceedings of the Korean Society of Broadcast Engineers Conference
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    • 2011.07a
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    • pp.316-319
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    • 2011
  • 본 논문에서는 그 동안 국내 지상파 DTV 방송의 임시대역으로 사용해 오던 Ch.61~69(752~806MHz)를 포함한 700MHz 대역의 주파수 Ch.52~69(698~806MHz)를 지상파방송 디지털전환 이후 경매에 의해 통신에 할당하려는 방송통신위원회의 정책 추진에 대한 기술적, 정책적 타당성을 분석하고, 디지털 방송에서의 주파수 필요성과 상관성을 비교하여 바람직한 주파수 정책에 대한 방향을 모색하고자 하였다. 디지털 방송의 경우 이 대역에서 차세대방송용으로 활용할 계획을 가지고 있으며 방송 콘텐츠산업과 디스플레이산업의 발전 촉매제로 간주하고 있다. UDTV(Ultra-HDTV) 및 Full-HD 3DTV 를 비롯하여 HD 혹은 Full-HD MMS(Multi Mode Service) 서비스와 무안경식 3DTV, 홀로그래피 3DTV 와 같은 차세대방송 환경 구축을 위해서는 우선 700MHz 대역의 주파수의 추가 확보와 정책적 지원의 필요성이 요구되고 있다. 본 논문에서는 무선통신과 방송분야의 주파수 요구 내용을 비교함으로써 바람직한 주파수 할당 정책에 대한 대안을 제시하였다.

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Next Generation Terrestrial DTV Transmission Technology (차세대 지상파 DTV 전송기술)

  • Kim, Sung-Hoon;Choi, Jin-Soo;Hong, Jin-Woo
    • Proceedings of the IEEK Conference
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    • 2008.06a
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    • pp.9-11
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    • 2008
  • In this paper, we describe a 1/4 rate robust modulation algorithm for Enhanced-xVSB system which is fully backward compatible with ATSC 8-VSB standard. Laboratory test results of proposed Enhanced-xVSB 1/4 rate mode is shown a significantly improved reception performance under multipath as well as AWGN channel. We suggest an Enhanced-xVSB terrestrial broadcasting system for in-band Pedestrian/Portable TV broadcasting service.

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The frequency utilization research for the terrestrial broadcasting direct received environment construction and next generation broadcasting (지상파방송 직접수신 환경 구축과 차세대방송을 위한 주파수 활용 연구)

  • Park, Sungkyu;Lee, Changhung;Park, Jongwon;Kim, Gwangho;Park, Gooman
    • Proceedings of the Korean Society of Broadcast Engineers Conference
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    • 2011.11a
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    • pp.27-30
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    • 2011
  • 본 논문에서는 방송용주파수를 좀 더 효율적으로 활용하여 시청자가 쉽게 지상파방송을 직접 수신할 수 있도록 DTV 방송 수신환경 개선 방법에 대해 찾아보고 난시청해소와 차세대방송에 필요한 주파수 소요량을 정량적으로 제시하고자 한다. 특히 디지털전환 이후에 회수되는 700MHz 대역 (108MHz 주파수폭)에 대하여 UDTV 와 Full-HD 3DTV 기술을 적용한 차세대방송을 구축할 때 난시청해소와 시청자와 방송과 산업에 미치는 효과를 제시한다.

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Enhanced-xVSB Development for Next Generation Terrestrial DTV Transmission System (차세대 지상파 DTV 전송방식 시스템을 위한 Enhanced-xVSB 개발)

  • Kim Sung-Hoon;Ji Kum-Ran;Lee Jae-Youn;Kim Seung-Won;Lee Soo-In;Kim Chang-Joong;Lee Ho-Kyoung
    • Proceedings of the Korean Society of Broadcast Engineers Conference
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    • 2004.11a
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    • pp.281-284
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    • 2004
  • This paper described an Enhanced-xVSB system for improving mobile/pedestrian reception performance to the ATSC DTV 8-VSB transmission standard. E-xVSB system can transmit a mixture of normal (8-VSB) stream and enhanced (robust) stream. The robust stream has a higher threshold of visibility (TOV) compared to the standard stream, and legacy receivers ignore the robust packets. Thus, Enhanced-xVSB system is fully backward compatible with a current ATSC standard. for mobile and portable reception support, E-xVSB system adopts a reduced constellation method as well as enhanced trellis-coded modulation scheme. E-xVSB system supports a variety of enhanced modulation schemes: Pseudo-2VSB, Enhanced-4VSB, modified Enhanced-8VSB and Hybrid-VSB. Proposed E-xVSB system performs well under serious dynamic multipath reception environment.

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Enhanced-TCM CODEC Development for Next Generation Terrestrial DTV Transmission System (차세대 지상파 DTV 전송시스템을 위한 Enhanced-TCM CODEC 개발)

  • Kim Sung-Hoon;Ji Kum-Ran;Lee Jae-Youn;Kim Seung-Won;Lee Soo-In;Kim Chang-Joong;Lee Ho-Kyoung
    • Journal of Broadcast Engineering
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    • v.10 no.1 s.26
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    • pp.14-21
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    • 2005
  • This paper described an Enhanced-xVSB system for improving mobile/pedestrian reception performance to the ATSC(Advanced Television System Committee) DTV 8-VSB transmission standard. E-xVSB system can transmit a mixture of normal (8-VSB) stream and enhanced (robust) stream. The robust stream has a higher threshold of visibility (TOV) compared to the standard stream, and legacy receivers ignore the robust packets. Thus, Enhanced-xVSB system is fully backward compatible with a current ATSC standard. For mobile and portable reception support, E-xVSB system adopts a reduced constellation methodas well as enhanced trellis-coded modulation scheme. E-xVSB system supports a variety of enhanced modulation schemes : Pseudo-2VSB, Enhanced-4VSB, modified Enhanced-8VSB and Hybrid-VSB. Proposed E-xVSB system performs well under serious dynamic multipath reception environment.