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Broadcasting, IEEE Transactions on

Issue 3 • Date Sept. 2013

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Displaying Results 1 - 21 of 21
  • Table of contents

    Page(s): C1
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    Freely Available from IEEE
  • IEEE Transactions on Broadcasting publication information

    Page(s): C2
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  • Field Trials and Evaluations of In-Band Digital Radio Technologies: HD Radio and DRM+

    Page(s): 401 - 411
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (2503 KB) |  | HTML iconHTML  

    This paper depicts the field trials and results for in-band digital radio technologies in Korea. For the in-band methods, HD Radio and DRM+ are considered. In HD Radio, MP3 hybrid mode and MP5 all digital modes are selected, and 4-QAM and 16-QAM are selected for DRM+. To evaluate the practical performance of each technology, system parameters and received electric field strength are evaluated in various test routes and environments. In the field trial, listening tests are also executed by test staffs, and the results of listening tests are analyzed and compared with results of system parameters. Since the trials consider various practical reception environments, the test results can be used as references for decision of digital radio standard. View full abstract»

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  • A Novel Distributed Translator for an ATSC Terrestrial DTV System

    Page(s): 412 - 421
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (1224 KB) |  | HTML iconHTML  

    This paper presents a new design and implementation method of distributed translator (DTxR), termed the equalization DTxR (EDTxR), for distributed translator network in ATSC systems. EDTxR has a simple structure and does not require any devices to be added to studio or transmitter facilities already deployed. EDTxRs which retransmit the same transmitter signal can have identical output symbol streams among them without additional synchronization information by utilizing the structure of the equalization digital on-channel repeater (EDOCR). Moreover, they can synchronize output frequency among them without global positioning system (GPS) clock receivers by adopting a crystal oscillator for each translator and compensating the frequency offset of the each crystal oscillator through the carrier and timing recovery. To verify the proposed method, multiple EDTxRs are implemented and tested in the laboratory and in the field. Through the tests, it is confirmed that EDTxR is a simple and economic distributed translator for distributed transmission system which does not need additional synchronization devices. Therefore, EDTxR can be a promising translator for coverage extension of digital terrestrial television broadcasting under spectrum deficient situations. View full abstract»

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  • Static Reception Results of DRM+ Field Trials in VHF Band II in Brazil

    Page(s): 422 - 431
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (1347 KB) |  | HTML iconHTML  

    The DRM+ (Digital Radio Mondiale) system is the extension up to 300 MHz of the DRM digital radio broadcasting system. During 2010 three different trials were conducted in Brazil with DRM+ system in VHF band II (popularly called FM band). These trials were defined to have a big, medium and small coverage area for big, local and community broadcasters. For this purpose, different transmission powers were used. The transmission was done with only DRM signal in low power trial. In the high and medium power trials the transmission was done in “combined mode”, that is, the FM and DRM+ signals were transmitted in adjacent channels from the same transmission site. In this paper the results of these trials are explained and compared with theoretical values. View full abstract»

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  • A Real-Time Error Resilient Video Streaming Scheme Exploiting the Late- and Early-Arrival Packets

    Page(s): 432 - 444
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (1269 KB) |  | HTML iconHTML  

    For real-time video streaming systems, the video packets arriving after the display deadline of their frames are considered as late-arrival packets, and typically they are discarded. This will affect the current frame and the following ones due to error propagations. For this reason, in this paper, we propose an approach to exploit the late-arrival and out-of-order packets, which includes two mechanisms. The first mechanism will use these packets to update the reference frames to make them more consistent with the encoder side, and this will eventually reduce the error propagations. The second mechanism will use these packets to increase the chance of successfully decoding the Reed-Solomon (RS) code. In the proposed approach, a sub-GOP based systematic RS code is used and optimized to exploit these packets, where the size of each sub-GOP and the parity packet number for each sub-GOP are optimally tuned, taking into consideration the maximum end-to-end delay, the network conditions, and other system parameters, so as to make the best use of the late-arrival packets and to exploit the out-of-order packets. Finally, the experimental results show the advantage of the proposed approach over other approaches. View full abstract»

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  • Joint Rate Allocation of Stereoscopic 3D Videos in Next-Generation Broadcast Applications

    Page(s): 445 - 454
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (463 KB) |  | HTML iconHTML  

    3D video is foreseen to be the next natural step in the evolution of digital media. Among various representation formats available for 3D videos, stereoscopic is considered the most mature technology so far. This paper proposes a joint rate allocation scheme for next-generation broadcast applications, in which multiple stereoscopic 3D videos are encoded and transmitted simultaneously. We first propose a scalable stereoscopic video coding scheme that inherits features from scalable video coding. The scalable format makes the rate control of each video as easy as bit-stream extraction. For the two views in stereo videos, the reference view is independently coded to provide backward compatibility, while the auxiliary view is coded using the reference view as a base layer to remove inter-view redundancy. Based on the well-known fact that the human visual system can compensate and conceal the degraded fidelity in one of the two views, provided the other view is encoded at a high quality, the proposed joint rate allocation scheme does adaptive bit allocation between views to obtain high compression efficiency and better quality. Experimental results show that the proposed framework achieves smaller quality fluctuation among videos and higher perceived quality in each video as compared with the existing system. View full abstract»

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  • Design of a Novel Antenna Array Beamformer Using Neural Networks Trained by Modified Adaptive Dispersion Invasive Weed Optimization Based Data

    Page(s): 455 - 460
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (431 KB) |  | HTML iconHTML  

    A new antenna array beamformer based on neural networks (NNs) is presented. The NN training is performed by using optimized data sets extracted by a novel invasive weed optimization (IWO) variant called modified adaptive dispersion IWO (MADIWO). The trained NN is utilized as an adaptive beamformer that makes a uniform linear antenna array steer the main lobe toward a desired signal, place respective nulls toward several interference signals, and suppress the side lobe level (SLL). Initially, the NN structure is selected by training several NNs of various structures using MADIWO-based data and by making a comparison among the NNs in terms of training performance. The selected NN structure is then used to construct an adaptive beamformer, which is compared to MADIWO-based and ADIWO-based beamformers, regarding the SLL and the ability to properly steer the main lobe and the nulls. The comparison is made, considering several sets of random cases with different numbers of interference signals and different power levels of additive zero-mean Gaussian noise. The comparative results exhibit the advantages of the proposed beamformer. View full abstract»

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  • A New Pilot Architecture for Sub-Band Uplink OFDMA Systems

    Page(s): 461 - 470
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (2632 KB) |  | HTML iconHTML  

    In sub-band uplink orthogonal frequency division multiple access (OFDMA) systems, the data signals of the different users are transmitted on non-overlapping frequency sub-bands. Moreover, the pilots used to estimate the carrier frequency offset (CFO) and channel state are generally placed at the edge of each sub-band. However, the accuracies of the CFO and channel estimates are seriously degraded by multiple-user interference (MUI) between neighboring subscribers. Conventionally, the effects of MUI are mitigated by inserting a guard sub-carrier between adjacent users and adding a single pilot to either edge of the data sub-carrier. However, in the present study, the guard sub-carrier is more fully exploited by adding three pilots to each side of the data subcarrier. Notably, in the proposed approach, the pilots of neighboring users are overlapped. As a result, the proposed architecture has the same bandwidth efficiency as that of the conventional guard subcarrier insertion scheme. It is shown that the proposed pilot design yields a lower MUI than the conventional guard subcarrier insertion method and achieves an improved bit error rate (BER) performance as a result. View full abstract»

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  • Dynamic Channel Reordering to Reduce Latency During Surfing Periods in IPTV Networks

    Page(s): 471 - 483
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (1350 KB) |  | HTML iconHTML  

    In IPTV networks, channel change latency represents a major concern in achieving broadcast-level service quality. Bandwidth limitations at the user side prevents the clients from receiving all the channels at once. As a result, most of the requests have to go through the network leading to significant delays during the channel change process. In this paper, we address this latency problem in IPTV networks by proposing a novel channel reordering technique that exploits the differing key-frame delivery times for the adjacent sessions to dynamically arrange the switching order during the surfing periods. The simulation results show that, compared to static channel ordering techniques, the proposed framework can achieve more than 50% improvement in channel change latency without introducing any significant overhead in the network. The proposed dynamic reordering technique is also shown to be robust against variations observed in channel listings and/or session time-shifts. View full abstract»

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  • Cost-Oriented Adaptive Multimedia Delivery

    Page(s): 484 - 499
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (3466 KB) |  | HTML iconHTML  

    Mobile Internet and mobile services that make use of mobile data are increasingly popular. However, the cost of content delivery, in particular, multimedia type content over cellular networks is still high and poses a challenge for some users who are not necessarily willing or cannot afford to pay too much for it. The problem is further exacerbated when video content is used, as this type of content is heavier and can lead to higher bills. In this context, this paper presents a novel cost-oriented adaptive multimedia delivery (COMEDY) mechanism that considers the user's willingness to pay for a certain video quality and user's mobile device characteristics to deliver adaptive multimedia content over wireless connection. The goal of the mechanism is to reduce the cost of multimedia delivery for users that are not willing to pay that much. The mechanism is evaluated both through objective and subjective studies. The evaluation shows that the proposed mechanism provides a reduction in the price paid for accessing multimedia content, and the user's perceived quality is not negatively affected. View full abstract»

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  • Joint Scalable Coding and Routing for 60 GHz Real-Time Live HD Video Streaming Applications

    Page(s): 500 - 512
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (1556 KB) |  | HTML iconHTML  

    Transmission of high-definition (HD) video is a promising application for 60 GHz wireless links, since very high transmission rates (up to several Gbit/s) are possible. In particular we consider a sports stadium broadcasting system where signals from multiple cameras are transmitted to a central location. Due to the high pathloss of 60 GHz radiation over the large distances encountered in this scenario, the use of relays might be required. The current paper analyzes the joint selection of the routes (relays) and the compression rates from the various sources for maximization of the overall video quality. We consider three different scenarios: (i) each source transmits only to one relay and the relay can receive only one data stream, and (ii) each source can transmit only to a single relay, but relays can aggregate streams from different sources and forward to the destination, and (iii) the source can split its data stream into parallel streams, which can be transmitted via different relays to the destination. For each scenario, we derive the mathematical formulations of the optimization problem and re-formulate them as convex mixed-integer programming, which can guarantee optimal solutions. Extensive simulations demonstrate that high-quality transmission is possible for at least ten cameras over distances of 300 m. Furthermore, optimization of the video quality gives results that can significantly outperform algorithms that maximize data rates. View full abstract»

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  • Effect of PAPR Reduction on Spectrum and Energy Efficiencies in OFDM Systems With Class-A HPA Over AWGN Channel

    Page(s): 513 - 519
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (422 KB) |  | HTML iconHTML  

    In this paper, we mainly analyze the relations between peak-to-average power ratio (PAPR) reduction, spectrum efficiency (SE), and energy efficiency (EE) in orthogonal frequency division multiplexing (OFDM) systems, respectively. Through PAPR reduction, the efficiency of high power amplifier (HPA) could be substantially improved, and the nonlinear distortion noise caused by the HPA could also be significantly reduced. As a result, the SE and EE are increased with a total transmit power constraint over additive white Gaussian noise (AWGN) channel. Moreover, we derive the quantitative relations between PAPR reduction, SE, and EE, respectively. Simulation results show that the OFDM system with PAPR reduction could achieve higher SE and EE than the system without PAPR reduction. View full abstract»

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  • Bandwidth and Power Scalable Digital Predistorter for Compensating Dynamic Distortions in RF Power Amplifiers

    Page(s): 520 - 527
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (1266 KB) |  | HTML iconHTML  

    In this paper, a bandwidth and power scalable digital predistortion architecture is proposed for the linearization of power amplifiers (PA) exhibiting memory effects. The proposed digital predistorter allows for low complexity update following changes in the signal's bandwidth and/or power level. Experimental validation carried on a 300-W Doherty PA shows that the scalable predistorter architecture achieves similar performance as its conventional counterpart. However, the proposed predistorter requires the update of up to 50% less coefficients than the conventional predistorter. View full abstract»

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  • A General Adaptive Digital Predistortion Architecture for Stand-Alone RF Power Amplifiers

    Page(s): 528 - 538
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (758 KB) |  | HTML iconHTML  

    This paper presents a general architecture of adaptive digital predistorter (DPD) for stand-alone radio frequency (RF) power amplifiers (PAs). The input and output of the proposed architecture are both RF signals, which is compatible with a stand-alone PA. This DPD system consists of three parts: the RF PA for linearization, RF front-ends with two down-conversion paths and one up-conversion path, and a field-programmable gate array (FPGA) board with ADC/DACs. This architecture enjoys the cost and performance advantages of the adaptive digital baseband predistortion while extending the DPD coverage to the general PA applications with direct RF input and output. A DPD prototype for stand-alone PAs is implemented. Performance improvement of the proposed architecture is validated by measurement results on a typical base-station PA. Experimental results demonstrate the generality of the proposed DPD architecture by comparing the performance with the conventional DPD system. View full abstract»

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  • Bit Division Multiplexing for Broadcasting

    Page(s): 539 - 547
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (3930 KB) |  | HTML iconHTML  

    This paper aims to improve the throughput of a broadcasting system that supports the transmission of multiple services with differentiated minimum signal-to-noise ratios (SNRs) required for successful receptions simultaneously. We propose a novel multiplexing method called bit division multiplexing (BDM), which outperforms the conventional time division multiplexing (TDM) counterpart by extending the multiplexing from symbol level to bit level. Benefiting from multiple error protection levels of bits within each high-order constellation symbol, BDM can provide so-called nonlinear allocation of the channel resources. Both average mutual information (AMI) analysis and simulation results demonstrate that, compared with TDM, BDM can significantly improve the overall transmission rate of multiple services subject to the differentiated minimum SNRs required for successful receptions, or decrease the minimum SNRs required for successful receptions subject to the transmission rate requirements of multiple services. View full abstract»

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  • An Automatic Broadcast System for a Weather Report Radio Program

    Page(s): 548 - 555
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    Here we describe a speech-synthesis method using templates that can generate recording-sentence sets for speech databases and produce natural sounding synthesized speech. Applying this method to the Japan Broadcasting Corporation (NHK) weather report radio program reduced the size of the recording-sentence set required to just a fraction of that needed by a comparable method. After integrating the recording voice of the generated recording-sentence set into the speech database, speech was produced by a voice synthesizer using templates. In a paired-comparison test, 66% of the speech samples synthesized by our system using templates were preferred to those produced by a conventional voice synthesizer. In an evaluation test using a five-point mean opinion score (MOS) scale, the speech samples synthesized by our system scored 4.97, whereas the maximum score for commercially available voice synthesizers was 3.09. In addition, we developed an automatic broadcast system for the weather report program using the speech-synthesis method and speech-rate converter. The system was evaluated using real weather data for more than 1 year, and exhibited sufficient stability and synthesized speech quality for broadcast purposes. View full abstract»

    Open Access
  • A Novel Attention-Based Key-Frame Determination Method

    Page(s): 556 - 562
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (7010 KB) |  | HTML iconHTML  

    This paper presents a novel key-frame detection method that combines the visual saliency-based attention features with the contextual game status information for sports videos. Two critical issues of the attention-based video content analysis are addressed: 1) the visual attention characteristics when a user is watching a video clip and 2) extracting the degree of excitement about the on-going game status. First, the object-oriented visual attention map and the algorithm of determining the contextual attention are presented. The procedure of the contextual inference is used to simulate how the game status attracts the viewers. Second, a fusion methodology of visual and contextual attention analysis based on the characteristics of human excitement is introduced. In addition, the amount of key-frames is determined by using the contextual attention score, while the key-frame determination depends on integrating all the visual attention scores. In experimental results, it demonstrates the robustness of the proposed system for basketball and baseball programs. View full abstract»

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  • 2013 IEEE Broadcast Symposium-San Diego

    Page(s): 563
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    Freely Available from IEEE
  • IEEE International Symposium on Broadband Multimedia Systems and Broadcasting

    Page(s): 564
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    Freely Available from IEEE
  • IEEE Transactions on Broadcasting information for authors

    Page(s): C4 - C3
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    Freely Available from IEEE

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IEEE Transactions on Broadcasting covers the field of broadcast technology, including the production, distribution, transmission, and propagation aspects of broadcasting.

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Yiyan Wu
Communications Research Ctr Canada