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Actual Conditions of Spill Over by the Japan TV Broadcasting Signals (일본 TV 방송신호의 전파월경 실태)

  • Hue, Young-Tae;Kim, Hyun;Woo, Jong-Woo
    • The Journal of Korean Institute of Communications and Information Sciences
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    • v.32 no.11A
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    • pp.1213-1218
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    • 2007
  • In this study, we have been constructed measuring system for spill over by the Japan TV broadcasting signals and analyzed those signals using APD curve. In Busan, we have been measured channel of Japan TV broadcasting signals during 9 months. The quality of image is that maximum grade is 2.5 level, and the quality of sound is that maximum grade is 3 level. In the result of analysis for measured Japan TV broadcasting signals, we have been observed Japan TV broadcasting signals those we have been chosen the ch 36 and ch 38, plotted the APD curve of each channel for a season, in Specially.

Contents and Channel Operations for Over-the-Air Digital Broadcasting (지상파 디지털방송의 콘텐츠와 채널운영)

  • Ha, Ju-Yong;Ryu, Seung-Kwan
    • The Journal of the Korea Contents Association
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    • v.8 no.5
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    • pp.176-183
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    • 2008
  • The transition to digital television is a massive and complex undertaking, affecting virtually every segment of the television industry and all viewers who watch television. In this respect, consequences of digital conversion of broadcasting and its related industries are so tremendous that countermeasure establishment for activation of digital broadcasting and programming industry is required. This paper explores the current situation of digital broadcasting in terms of the channel operation and contents focusing on the cases of the U.S. and U.K. In doing so, this paper presents reasonable directions and policy suggestions that should be resolved to advance Korean digital broadcasting.

Implementation of Personalized EPG Service based on Tru2Way (Tru2Way기반의 사용자 맞춤형 EPG 서비스 구현)

  • Park, Doo-Jin;Lee, Jae-Dong
    • Journal of Korea Society of Industrial Information Systems
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    • v.21 no.1
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    • pp.51-59
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    • 2016
  • The progression of broadcasting technology changed the previous analogue broadcasting system into digital, which in result allowed several broadcasting programs to be transmitted as one stream by multiplexing. This multi channel environment interferes with audience to choose the program they want. EPG acts as supporter in this multi channel environment. The existing EPG system is limited in providing searching function with title, genre, date and Wish-list in multi-media environment. Thus, this thesis proposes new type EPG using PSIP information modification to respond with the change of broadcasting market. This type of EPG can be applied to several kinds of broadcasting systems.

A Study on Delivery Integration of UHD, Mobile HD, Digital Radio based on ATSC 3.0 (ATSC 3.0 기반 UHD, 이동HD, 디지털라디오 통합전송 연구)

  • Seo, Chang Ho;Im, Yoon Hyeock;Jeon, Sung Ho;Seo, Jae Hyun;Choi, Seong Jhin
    • Journal of Broadcast Engineering
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    • v.24 no.4
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    • pp.643-659
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    • 2019
  • In this paper, the technology verification of next generation broadcasting technology and service suitable for domestic broadcasting environment was carried out to build and activate domestic terrestrial UHD broadcasting. ATSC 3.0-based mobile HD broadcasting is currently conducting experiments with various parameters from broadcasting companies, research institutes and others. However, experiments on integrated transmissions, including audio services, have not been carried out. Through this experiment, we first performed the theory and experiment on the maximum number of ATSC 3.0 based UHD broadcasting service, maximum service number of HD broadcasting considering mobility, and maximum service number of audio broadcasting within one channel (6MHz). Second, parameters for integrated transmission of each service (UHD broadcasting, mobile HD and audio broadcasting) in one channel were derived. Finally, we studied technical possibilities through field tests that we receive while moving directly in the field.

MIMO Radio Channel Measurement and Analysis at 781MHz (781MHz 대역에서 MIMO 전파 채널 측정 및 분석)

  • Jeong, Won-Ho;Kim, Joo-Seok;Jung, Myoung-Won;Yoon, Young-Keun;Kim, Jong-Ho;Kim, Kyung-Seok
    • The Journal of the Institute of Internet, Broadcasting and Communication
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    • v.12 no.2
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    • pp.181-188
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    • 2012
  • In this paper, the measurement data is analyzed and channel parameters are derived through MIMO Channel measurements at 781MHz considering outdoor multi-path environment. 781MHz frequency band currently operates the DTV system. However, it will be allocated new mobile communication frequency band. The channel characteristics at 781MHz seem to be similar existing mobile communication system at 900MHz but a study on channel characteristics of signal transfer process is necessary because there is incomplete study in mobile networks at 781MHz. To avoid interference with Korean DTV broadcasting, we measured channel characteristics in city/suburban areas of Jeju island by channel sounder and 4×4 antenna of the ETRI(Korea Electronics and Telecommunications Research Institute). Path Loss, Delay Spread, Angular Spread and K-factor were derived based on measured data.

On the Restriction of Cable TV Local Channel's News Commentary Function (케이블TV 지역채널의 해설.논평 금지에 관한 일 고찰)

  • Shin, Tae-Sub;Kim, Jae-Young
    • Korean journal of communication and information
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    • v.56
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    • pp.117-131
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    • 2011
  • This study critically reviews the justifications for the restriction of cable local channel's news commentary function in terms of the fundamental principle of journalism. By doing so, it tries to find some problems and ways to solve them. Broadcasting Law and Korea Communications Commission's Rule inhibiting the news commentary of cable local channel on specific issues conflict with the basis of journalism which is particularly represented in Broadcasting Law. The law and rule tend to solidify public opinion for vested rights of local worthies. In addition, they are likely to degenerate cable local channel to the tools for promoting local government. Therefore, this article proposes the revision of the law and rule towards permitting the news commentary of cable local channel. At the same time, it suggests a new broadcasting policy for inducing cable local channel to increase manpower resources and production investment.

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Digital Signal Processing Techniques for the Equalization Digital On-Channel Repeater in the ATSC Terrestrial DTV System (ATSC 지상파 DTV 시스템의 등화형 디지털 동일 채널 중계기를 위한 디지털 신호 처리 기술)

  • Park Sung Ik;Eum Homin;Lee Yong-Tae;Kim Heung Mook;Seo Jae Hyun;Kim Hyoung-Nam;Kim Seung Won
    • Journal of Broadcast Engineering
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    • v.9 no.4 s.25
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    • pp.357-370
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    • 2004
  • In this paper we propose Digital Signal Processing (DSP) techniques for the Equalization Digital On-Channel Repeater(EDOCR) in the ATSC digital TV (DTV) System. DSP techniques consist of demodulation. baseband equalization, and remodulation. Since the time delay caused by signal processing in the EDOCR can seriously affect the performance of ATSC legacy receivers, it is required that the processing time should be minimized as much as possible. To achieve this goal, we focus on the reduction of the EDOCR's time delay with the minimization of its performance degradation. In addition, we present recommended proper parameters for hardware implementation based on extensive simulation result.

Parameter Determination of Digital Terrestrial TV System Using Protection Ratios for digital TV (디지털 지상파 TV 신호간 간섭보호비를 이용한 시스템 파라메터 결정)

  • 이일근;김택환박재홍송영중
    • Proceedings of the IEEK Conference
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    • 1998.10a
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    • pp.139-142
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    • 1998
  • This paper presents a method to determine the rolloff factors of both the digital terrestrial TV modulator and the bandpass filter (BPF) at the digital TV receiver input, using an analytical power spectral density model satisfying given co-channel and adjacent channel protection ratios for the digital terrestrial broadcasting services. Since the proposed method is very simple and effective to use, also can be used regardless of type of systems or modulation techniques, this method is expected to be applied to select some other digital terrestrial broadcasting system specifications.

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Discovered Pilot Designs in MIMO OFDM System with optimization algorithms

  • JunYoung Son
    • International Journal of Internet, Broadcasting and Communication
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    • v.15 no.4
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    • pp.44-50
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    • 2023
  • For Wi-Fi and IoT wireless systems, high-capacity wireless communication technology is being applied using MIMO OFDM. Because of virtu0al subcarriers in the practical MIMO OFDM system, the pilot subcarriers cannot be spaced equally. Thus, it is difficult to obtain a good mean square error (MSE) performance of the channel estimate. This paper proposes applicable methods and the newly discovered locations of pilot subcarriers in four transmitted antennas resulting in a good MSE performance with proposed optimization algorithms.

A Study of Development of Transmission Systems for Next-generation Terrestrial 4K UHD & HD Convergence Broadcasting (차세대 지상파 4K UHD & HD 융합방송을 위한 전송 시스템 개발에 관한 연구)

  • Oh, JongGyu;Won, YongJu;Lee, JinSub;Kim, YongHwan;Paik, JongHo;Kim, JoonTae
    • Journal of Broadcast Engineering
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    • v.19 no.6
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    • pp.767-788
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    • 2014
  • The worldwide transition from analog to digital broadcasting has now been completed and the need to study next generation standards for Ultra High Definition TV (UHDTV) broadcasting, and broadcasting & communication convergence systems is rapidly growing. In particular, high resolution mobile broadcasting services are needed to satisfy recent consumers. Therefore, the development of highly efficient convergence broadcasting systems that provide fixed/mobile broadcasting through a single channel is needed. In this paper, a service scenario and requirements for providing 4K UHD & HD convergence broadcasting services through a terrestrial single channel are analyzed by employing the latest transmission and A/V codec technologies. Optimized transmission parameters for 6 MHz & 8 MHz terrestrial bandwidths are drawn, and receiving performances are measured under Additive White Gaussian Noise (AWGN) and time-varying multipath channels. From the results, in a 6 MHz bandwidth, the reliable receiving of HD layer data can be achieved when the receiver velocity is maximum 140 Km/h and is not achieved when the velocity is over 140 Km/h due to the limit of bandwidth. When the bandwidth is extended to 8 MHz, the reliable receiving of both 4K UHD and HD layer data is achieved under a very fast fading multipath channel.