• Title/Summary/Keyword: Broadcasting Reception

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A Study of limitation of Service Area by UWB transmission jamming in DMB System (DMB 시스템에서 UWB 전파가 서비스에 미치는 영향에 관한 연구)

  • Kim, Dong-Ok;Jung, Seung-Jong
    • 한국정보통신설비학회:학술대회논문집
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    • 2005.08a
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    • pp.141-145
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    • 2005
  • In this paper, UWB system did research about effect that interference effect with neighborhood single equipment or nearby group equipment gets In DMB service. 2.6425GHz satellite digital multimedia broadcasting service(SDMB) that electric wave interference special quality is contiguity frequency-band including interference of signal by unnecessary radiation level that is radiated in UWB system, and 3.4125GHz broadcasting relay net that is In-band frequency-band and interference effect degree that get in service did comparative analysis. SDMB system was BER $1{\times}10^{-4}$ that interference effect happens from 6.5m point and broadcasting signal reception is possible at 4m point. Also, it was BER $1{\times}10^{-4}$ that interference effect begins to happen from 5.0m point about center frequency 3.4126GHz and broadcasting signal reception is possible at 2m point. And, confirmed that UWB system of impulse method is less interference effect about 2 dB than UWB system of OFDM method, to electric wave of UWB system that is small output

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An Improvement of Performance in a Satellite Antenna Tracking Control System for Mobile DAB Reception (DAB수신을 위한 이동체용 위성 안테나 트랙킹 시스템의 성능 개선)

  • Jeong Joong-Sung
    • Journal of Advanced Marine Engineering and Technology
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    • v.28 no.7
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    • pp.1178-1184
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    • 2004
  • This paper presents the development of a satellite antenna tracking control system using a plane antenna for mobile DAB(Digital Audio Broadcasting) reception. To track more rapidly in the antenna of this system, this simple tracking system only tracks a direction of azimuth using pendulum in the direction of elevation. This system should track using the AGC(Automatic Gain Control) of the signal level which can receive DAB in spite of the changing of point and movement of the mobile. The directional gyro sensor is attached to solve the delay time in the Proposed tracking algorithm. The effectiveness of both the stabilization and tracking algorithm is demonstrated through experiment measuring AGC signal level. The implemented satellite antenna tracking control system is shown to be excellent for mobile DAB reception.

A Study on Asymmetrical Interactive e-Book Publication Composition by Using DTV Broadcasting (비대칭 쌍방향 전자 책 출판 TV전송 시스템 구성에 관한 연구)

  • 강명구;진용옥
    • Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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    • 2001.05a
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    • pp.201-208
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    • 2001
  • In the 21 st century, broadcasting, communication, and computer have been integrated due to the development of digital technology. Accordingly, to overcome the limit of respective communication media and to maintain them, their independent area shall not be classified. This study is to examine the future environment of digital TV broadcasting, to analyze customizing type service and interactive type TV technology, and to make asymmetric interactive digital TV publication broadcasting system, which is TV broadcasting in the next generation to treat visual image, sound, and various data all together by harmonizing broadcasting and communication like ISDB(Integrate Service Digital Broadcasting). In addition, to develop service on publication broadcasting with high quality, this study is tn propose to develop relative devices for TV/PC reception to realize a new communication type TV publication broadcasting, by analyzing technology for producing, sending, transmitting, receiving, and saving to apply to customizing type interactive system and by examining its application.

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Design and Implementation of 8K UHD Encapsulation Method for Efficient Transmission and Reception based on MMT

  • Song, Seulki;Ryu, Youngsu;Wee, Jungwook;Park, Kyungwon;Kwon, Kiwon
    • KSII Transactions on Internet and Information Systems (TIIS)
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    • v.12 no.2
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    • pp.860-872
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    • 2018
  • In this Paper, we propose 8K UHD (Ultra High Definition) encapsulation method for efficient transmission and reception based on MMT (MPEG Media Transport). Broadcasting services for 8K UHD allow users to feel the maximized reality. However, present technology is difficult to provide 8K UHD in broadcasting networks, because the 8K UHD bitrate is too high to be transmitted in the current broadcasting networks. Research for transmitting 8K UHD is underway. In some researches, a receiver is implemented with four 4K UHD display instead of a 8K UHD display. In order to transmit 8K UHD within the limited transmission bitrate of broadcasting network, 8K UHD contents encoded by SHVC (Scalable High Efficiency Video Coding) and then transmitted over heterogeneous network. For using the broadcasting and communication networks, MMT standard is used. MMT is IP based transmission protocol as the next generation transmission protocol. According to the MMT standard, video stream encapsulated and transmitted in MMTP (MMT Protocol) packet. IP-based broadcasting and communication networks can be used to transmit simultaneously, and the receiver can synchronize and play it. We propose an encapsulation method that can efficiently transmit and receive 8K UHD. The proposed method increases a payload rate and decreases an initial delay at the receiver. We show that the efficiency of the proposed method is verified by experimental tests.

Linear Diversity Analysis for M-ary Square Quadrature Amplitude Modulation over Nakagami Fading Channels

  • Yoon, Dong-Weon;Chang, Dae-Ig;Kim, Nae-Soo;Woo, Hoon-Shik
    • ETRI Journal
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    • v.25 no.4
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    • pp.231-237
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    • 2003
  • We derive and analyze the exact closed-form expression for the average bit error probability (BEP) of M-ary square quadrature amplitude modulation (QAM) for diversity reception in frequency-nonselective Nakagami fading. A maximal ratio combining (MRC) diversity technique with independent or correlated fading cases are considered. Numerical results demonstrate error performance improvement with the use of MRC diversity reception. The presented new expressions offer a convenient way to evaluate the performance of M-ary square QAM with an MRC diversity combiner for various cases of practical interest.

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The Development of the USB-DMB Receiver

  • Park, Nho-Kyung;Jin, Hyun-Joon
    • The Journal of the Acoustical Society of Korea
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    • v.23 no.3E
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    • pp.74-78
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    • 2004
  • As analog audio systems are changing to digital systems, the DAB (Digital Audio Broadcasting) is expected to provide CD quality audio, various data services with interactiveness and excellent mobile reception ability. The DMB (Digital Multimedia Broadcasting), as more advanced successor of the DAB, adds video capability on the audio and data services. The DAB system assures high quality audio services even when the reception is through portable and mobile receivers. In this paper, USB-DAB receiver and PCI-DMB receiver are designed and implemented. The DAB receiver and the DMB receiver incorporate with PC to make use of computational power and application software of Pc. This enables the developed system to be more flexible and to meet various applications easier.

Information Behavior on Social Live Streaming Services

  • Scheibe, Katrin;Fietkiewicz, Kaja J.;Stock, Wolfgang G.
    • Journal of Information Science Theory and Practice
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    • v.4 no.2
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    • pp.6-20
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    • 2016
  • In the last few years, a new type of synchronous social networking services (SNSs) has emerged—social live streaming services (SLSSs). Studying SLSSs is a new and exciting research field in information science. What information behaviors do users of live streaming platforms exhibit? In our empirical study we analyzed information production behavior (i.e., broadcasting) as well as information reception behavior (watching streams and commenting on them). We conducted two quantitative investigations, namely an online survey with YouNow users (N = 123) and observations of live streams on YouNow (N = 434). YouNow is a service with video streams mostly made by adolescents for adolescents. YouNow users like to watch streams, to chat while watching, and to reward performers by using emoticons. While broadcasting, there is no anonymity (as in nearly all other WWW services). Synchronous SNSs remind us of the film The Truman Show, as anyone has the chance to consciously broadcast his or her own life real-time.

An Implementation of TPEG Transmission and Reception Systems Based on Digital Radio Mondiale (DRM 기반 TPEG 송.수신 시스템 구현)

  • Kwon, Ki-Won;Park, Kyung-Won;Jeon, Won-Gi;Choi, Young-Keon;Chang, Tae-Wook
    • 한국정보통신설비학회:학술대회논문집
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    • 2008.08a
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    • pp.125-128
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    • 2008
  • In this paper, the Transport Protocol Experts Group(TPEG) transmission and reception system based on Digital Radio Mondiale(DRM) is implemented for traffic information services. DRM stands for the European radio broadcasting standard to bring AM radio into digital radio, designed to work at frequencies below 30MHz. DRM can offer various data services such as text messages and a slide show service as well as audio services. In spite of low datarate, the TPEG system on DRM has an advantage that the traffic information service system for whole country can be established because DRM can offer wider service ranges than terrestrial-digital multimedia broadcasting(T-DMB) and simply archive a single frequency network.

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Color reappearance investigation of monitor for reception such as TV broadcasting in digital age (디지털 시대의 TV방송등 수신용 모니터의 색 재현 고찰)

  • Kang, Tae-Keun
    • Proceedings of the Korean Institute of IIIuminating and Electrical Installation Engineers Conference
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    • 2004.05a
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    • pp.570-574
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    • 2004
  • Technical supply reason of digital base and important color reappearance of WEB base that is diffused rapidly on industry whole. Examined my outside factor investigation and revision method of inaccurate color reproduction and color reappearance valuation method influencing in color reappearance of monitor for last reception using in on-line shopping as well as end consumers in graphic age

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Limited Reception Function based Two-Way Authentication T-DMB System (제한수신 기능을 통한 양방향 인증 T-DMB 시스템)

  • Lee, Jong-Won;Park, Sang-No;Yu, Dae-Sang;Kim, Jong-Moon;Jung, Hoe-Kyung
    • Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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    • 2016.05a
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    • pp.794-796
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    • 2016
  • Recently terrestrial mobile multimedia broadcasting(T-DMB) service is being provided throughout the country are expanding and demand is increasing day by day. T-DMB has the advantage of being cheaper in cost than installing another mobile multimedia broadcasting. However, there are a variety data of additional and provide it difficult for localized emergency alert broadcasting services. In this paper, a method to solve this problem feature was designed to restrict incoming unidirectional / bidirectional authentication via T-DMB system. In the mobile device is received by the T-DMB broadcasting service authentication mechanism for re-transmission to the mobile device, and T-DMB receiving other registered users can view it impossible to receive the broadcast. Through the proposed system it is considered to be able to solve the problems of the existing T-DMB technology.

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