• Title/Summary/Keyword: Digital Video Broadcasting (DVB)

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Low Complexity Synchronizer Using Common Autocorrelator for DVB-S2 System

  • Park, Jang-Woong;SunWoo, Myung-Hoon;Kim, Pan-Soo;Chang, Dae-Ig
    • JSTS:Journal of Semiconductor Technology and Science
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    • v.9 no.4
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    • pp.181-186
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    • 2009
  • This paper presents an efficient synchronizer architecture using a common autocorrelator for Digital Video Broadcasting via Satellite, Second generation (DVB-S2). To achieve the required performance under the worst channel condition and to implement the efficient H/W resource utilization of functional synchronization blocks, we propose a new efficient common autocorrelator structure. The proposed architecture can decrease about 92% of multipliers and 81% of adders compared with the direct implementation. Moreover, the proposed architecture has been thoroughly verified in XilinxTM Virtex IV and R&STM SFU (Signaling and Formatting Unit) broad-cast test equipment.

A Study on a DVB-SI based Data Service providing Additional Information of PPL Advertising (PPL광고의 부가정보를 제공하는 DVB-SI 기반 데이터서비스 연구)

  • KO, Kwangil
    • Convergence Security Journal
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    • v.19 no.4
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    • pp.189-195
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    • 2019
  • PPL advertising is growing due to the cheaper cost than other TV commercials, the familiar image construction from natural exposure in video, and the overseas marketing effects from programs export. However, it is difficult to provide additional information on PPL advertising targets in addition to short video exposure due to the restriction that they should be exposed without antagonizing viewers. This study designed a data service that supports PPL advertising, which provides additional information for PPL advertising targets. Specifically, the user scenario and user interface of the data service were designed considering the characteristics of the TV platform, the key additional information was defined by distinguishing the typical types of PPL advertisement, and the information on when PPL advertising targets should be exposed in the program was devised. We also developed a DVB-SI based method to provide the supplementary information to the data service.

Adaptive Call Admission and Bandwidth Control in DVB-RCS Systems

  • Marchese, Mario;Mongelli, Maurizio
    • Journal of Communications and Networks
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    • v.12 no.6
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    • pp.568-576
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    • 2010
  • The paper presents a control architecture aimed at implementing bandwidth optimization combined with call admission control (CAC) over a digital video broadcasting (DVB) return channel satellite terminal (RCST) under quality of service (QoS) constraints. The approach can be applied in all cases where traffic flows, coming from a terrestrial portion of the network, are merged together within a single DVB flow, which is then forwarded over the satellite channel. The paper introduces the architecture of data and control plane of the RCST at layer 2. The data plane is composed of a set of traffic buffers served with a given bandwidth. The control plane proposed in this paper includes a layer 2 resource manager (L2RM), which is structured into decision makers (DM), one for each traffic buffer of the data plane. Each DM contains a virtual queue, which exactly duplicates the corresponding traffic buffer and performs the actions to compute the minimum bandwidth need to assure the QoS constraints. After computing the minimum bandwidth through a given algorithm (in this view the paper reports some schemes taken in the literature which may be applied), each DM communicates this bandwidth value to the L2RM, which allocates bandwidth to traffic buffers at the data plane. Real bandwidth allocations are driven by the information provided by the DMs. Bandwidth control is linked to a CAC scheme, which uses current bandwidth allocations and peak bandwidth of the call entering the network to decide admission. The performance evaluation is dedicated to show the efficiency of the proposed combined bandwidth allocation and CAC.

Efficient Frame Synchronizer Architecture Using Common Autocorrelator for DVB-S2 (공통 자기 상관기를 이용한 효율적인 디지털 위성 방송 프레임 동기부 회로 구조)

  • Choi, Jin-Kyu;SunWoo, Myng-Hoon;Kim, Pan-Soo;Chang, Dae-Ig
    • Journal of the Institute of Electronics Engineers of Korea SD
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    • v.46 no.4
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    • pp.64-71
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    • 2009
  • This paper presents an efficient frame synchronizer architecture using the common autocorrelator for Digital Video Broadcasting via Satellite, Second generation(DVB-S2). To achieve the satisfactory performance under severe channel conditions and the efficient hardware resource utilization of functional synchronization blocks which have been implemented, we propose a new efficient common autocorrelator structure. The proposed architecture can improve the performance of the frame and frequency synchronizer since each block operates jointly in parallel and significantly reduce the complexity of the frame synchronizer. Hence, The proposed architecture can ensure the decrease by about 92% multipliers and 81% adders compared with the direct implementation. Moreover, it has been thoroughly verified with an FPGA board and R&STM SFU broadcast test equipment and consists of 29,821 LUTs with XilinxTM Virtex IV LX200.

Efficient Frame Synchronization Detector and Low Complexity Automatic Gain Controller for DVB-S2 (효율적인 디지털 위성 방송 프레임 동기 검출 회로 및 낮은 복잡도의 자동 이득 제어 회로)

  • Choi, Jin-Kyu;Sunwoo, Myung-Hoon;Kim, Pan-Soo;Chang, Dae-Ig
    • Journal of the Institute of Electronics Engineers of Korea SD
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    • v.46 no.2
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    • pp.31-37
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    • 2009
  • This paper presents an efficient frame synchronization strategy with the identification of modulation type for Digital Video Broadcasting-Satellite second generation (DVB-S2). To detect the Start Of Frame (SOF) and identify a modulation mode at low SNR, we propose a new correlator structure and a low complexity Automatic Gain Controller (AGC). The proposed frame synchronization architecture can reduce about 93% multipliers and 89% adders compared with the direct implementation of the Differential - Generalized Post Detection Integration (D-GPDI) algorithm which is very complex and the proposed a low complexity AGC consists of only 5 multipliers and 3 adders. The proposed architecture has been thoroughly verified on the Xilinx Virtex II FPGA board.

An Efficient 4K and 8K UHD Transmission Scheme on Convergence Networks with Broadcasting and LTE by using Coordinated Multi-Point Transmission System

  • Ryu, Youngsu;Park, Kyungwon;Wee, Jungwook;Kwon, Kiwon
    • 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.

Comparison of Channel Estimation Schemes for Digital Broadcasting System in a Mobile Environment (이동 환경에서 디지털 방송 시스템을 위한 채널 추정 기법의 성능 비교)

  • Kim, Ki-Nam;Kim, Jin-Ho;Cho, Sung-Joon
    • Journal of Advanced Navigation Technology
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    • v.9 no.1
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    • pp.41-47
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    • 2005
  • In this paper, the performances of various channel estimation schemes for DVB-H system are investigated. The linear interpolation, the second order interpolation, the cubic spline interpolation, and the time-domain interpolation, which are used in frequency domain, are chosen as the channel estimation schemes. We derived the performances of Mean Square Error (MSE), Bit Error Rate (BER), and the complexity of calculation in Rayleigh and Rician fading channel through computer simulations. From the simulation results, the cubic spline interpolation shows the best performance under high $E_b/N_0$ environments.

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Improved Equalization Performance for DVB-T2 based on Data Reuse (데이터 재사용기반 DVB-T2 등화 성능 개선)

  • Kang, Eun-Su;Han, Dong-Seog
    • Journal of the Institute of Electronics Engineers of Korea TC
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    • v.49 no.8
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    • pp.33-38
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    • 2012
  • An equalization algorithm is proposed for digital video broadcasting - terrestrial version 2 (DVB-T2) systems to minimize the noise effect. It is done by averaging frequency-domain data and channel responses obtained with different signal intervals for the same orthogonal frequency division multiplexing (OFDM) symbol. Its performance is evaluated by computer simulations along with comparison of conventional algorithms.

Broadband CMOS Single-ended to Differential Converter for DVB-S2 Receiver Tuner IC (DVB-S2 수신기 튜너용 IC의 광대역 CMOS 단일신호-차동신호 변환기)

  • Shin, Hwa-Hyeong;Kim, Nam-Young
    • Proceedings of the Korean Institute of Electrical and Electronic Material Engineers Conference
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    • 2008.06a
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    • pp.185-185
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    • 2008
  • This paper describes the broadband SDC (Single-ended to Differential Converter) for Digital Video Broadcasting-Satellite $2^{nd}$ edition (DVB-S2) receiver tuner IC. It is fabricated by using $0.18{\mu}m$ CMOS process. In order to obtain high linearity and low phase mismatch, the broadband SDC (Single-ended to Differential Converter) is designed with current mirror structure and cross-coupled capacitor and current source binding differential structure at VDD. The simulation result of SDC shows IIP3 of 11.9 dBm and IIP2 of 38 dBm. It consumes 5mA current with 2.7V supply voltage.

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A Study on Optical High-Throughput Efficiency Methods for Digital Satellite Broadcasting System (위성 방송 시스템에서 최적의 고전송 효율 기법 연구)

  • Baek, Chang-Uk;Jung, Ji-Won
    • The Journal of the Institute of Internet, Broadcasting and Communication
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    • v.17 no.3
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    • pp.63-69
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    • 2017
  • In next generation satellite broadcasting system, requirement of high throughput efficiency has been increasing continuously. To increase throughput efficiency and improve bit error performance simultaneously, FTN method and LDPC codes are employed in new sattelite standard, DVB-S3 system. This paper considered three kinds of methods for increase throughput efficiency. Firstly, as conventional one, high coding rate parity matrix in LDPC encoder is considered. Secondly, punctured coding scheme which delete the coded symbols according to appropriate rules is considered. Lastly, FTN method which transmit fater than Nyquist rate is considered. Among of three kinds of methods, FTN method is most efficient in aspect to performance while maintain same throughput efficiency.