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Broadcasting, IEEE Transactions on

Issue 2 • Date June 2008

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Displaying Results 1 - 25 of 25
  • 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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  • Modeling and Measurement of Airplane Flutter Phenomena on TV Broadcasting Signal

    Page(s): 173 - 181
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (1001 KB) |  | HTML iconHTML  

    This paper presents a novel approach to model TV signal due to airplane flutter phenomena. The three components of the modeling are based on 1) Bistatic radar cross sections (RCS) of an ellipsoid, 2) 3-dimensional geometry consideration technique to calculate the distance difference between direct and reflected waves due to airplane, and 3) Ray theory, based on physical and geometrical consideration. Unlike previous works, the model takes into account of realistic parameters such flying height, distance from the airport, flying angle, altitude, aircraft body type and others. The simulation results are then compared with measurement results at 60.75 MHz and 208.75 MHz. The results have shown good agreement between simulation and measurement patterns. View full abstract»

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  • A Reliable and Power Efficient Beacon Structure for Cognitive Radio Systems

    Page(s): 182 - 187
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (446 KB) |  | HTML iconHTML  

    In this paper, an energy efficient structure for beacon signal transmission is proposed for incumbent wireless microphone protection in a cognitive radio system. The proposed structure consists of two consecutive parts: Synchronization with Index and Synchronization with Payload, transmitted as in-phase and quadrature components respectively. As opposed to the current beacon design, it can achieve more reliable and balanced error protection for the beacon components, while keeping the system complexity low. View full abstract»

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  • A Stereoscopic Video Generation Method Using Stereoscopic Display Characterization and Motion Analysis

    Page(s): 188 - 197
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (1699 KB) |  | HTML iconHTML  

    Stereoscopic video generation methods can produce stereoscopic content from conventional video filmed with monoscopic cameras. In this paper, we propose a stereoscopic video generation method using motion analysis which converts motion into disparity values and considers multi-user conditions and the characteristics of the display device. The field of view and the maximum and minimum disparity values were calculated in the stereoscopic display characterization stage and were then applied to various types of 3D displays. After motion estimation, we used three cues to decide the scale factor of motion-to-disparity conversion. These cues were the magnitude of motion, camera movements and scene complexity. A subjective evaluation showed that the proposed method generated more satisfactory video sequence. View full abstract»

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  • Hybrid Temporal Error Concealment Methods for Block-Based Compressed Video Transmission

    Page(s): 198 - 207
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (4587 KB) |  | HTML iconHTML  

    Boundary matching algorithm (BMA) and decoder motion vector estimation (DMVE) are two well-known temporal error concealment methods using the matching-based approach. In these two methods, the motion vector of each missing block is estimated by choosing one among candidate motion vectors which minimizes a sum of absolute differences (SAD) between boundary pixels of the corrupted macroblock. In general, the performance of DMVE is better than that of BMA. However, depending on the location or pattern of the corrupted block, BMA produces higher visual quality than DMVE. In this paper, we propose two types of hybrid error concealment methods; switching method and blending method. The switching method chooses one of two results obtained by BMA and DMVE based on the normalized SAD values. In the blending method, the weighted sum of the results concealed by the aforementioned two methods is utilized to improve the performance of error concealment. In order to reduce blocking artifacts further, the modified overlapped-block motion compensation is adaptively applied to the concealed blocks. Simulation results show that the proposed methods outperform other techniques in terms of subjective visual quality as well as PSNR performance. View full abstract»

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  • An Effective IPTV Channel Control Algorithm Considering Channel Zapping Time and Network Utilization

    Page(s): 208 - 216
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (1269 KB) |  | HTML iconHTML  

    This paper presents a simple but effective IPTV channel control algorithm that keeps channel zapping time in the tolerable range with high network utilization. The proposed algorithm controls channel zapping time by adjusting the number of broadcasting channels that are located close to users over IP networks and the number of additional I-frames inserted into each channel, based on the user's channel preference information. Finally, experimental results are provided to show the performance of the proposed algorithm. View full abstract»

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  • Improved Channel Estimation Based on Parametric Channel Approximation Modeling for OFDM Systems

    Page(s): 217 - 225
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (764 KB) |  | HTML iconHTML  

    Orthogonal frequency division multiplexing (OFDM) together with high order modulation scheme requires accurate channel estimation to perform coherent demodulation. In this paper, improved channel estimation methods based on a parametric channel approximation model are proposed for the OFDM system using pilot subcarriers. This channel model is called fraction taps channel approximation (FTCA) model, which is defined as a finite impulse response (FIR) on some definitive delay taps that have a fraction tap delay spacing relative to the sampling interval. Then, based on the FTCA channel model, the minimum mean square error (MMSE) and least square (LS) estimators are derived. Simulations over non-sample-spaced channels prove that the use of the FTCA channel model can effectively eliminate the problem of multi-path delay estimation and reduce the signal subspace dimension of the channel correlation matrix, where the full-rank estimators using pilot subcarriers can be adopted, and consequently, improve the channel estimation performance. View full abstract»

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  • Configurable Multi-Rate Decoder Architecture for QC-LDPC Codes Based Broadband Broadcasting System

    Page(s): 226 - 235
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (487 KB) |  | HTML iconHTML  

    In this paper we present a Base-matrix based decoder architecture for multi-rate QC-LDPC codes proposed in broadband broadcasting system. We use the Modified Min-Sum Algorithm (MMSA) as the decoding algorithm in this architecture, which lowers the complexity of the LDPC decoder while keeping almost the same performance or even better. Based on this algorithm, we designed a novel check node processing unit to reduce the complexity of the decoder and facilitate the multiplex of the processing units. The decoder designed with hardware constraints is not only scalable in throughput, but also easily configurable to support different QC-LDPC codes flexible in code rate and code length. View full abstract»

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  • Field Tests of Digital Audio Broadcasting in the FM Band Based on Continuous Phase Modulation

    Page(s): 236 - 248
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (2346 KB) |  | HTML iconHTML  

    We propose a new broadcasting scheme for the transmission of digital audio signals simultaneously with existing analog frequency modulation radio (88-108 MHz) in adjacent channels, denoted as in-band-adjacent channel system (IBAC) . This broadcasting scheme enables the transmission of digital audio data in CD quality with a data rate of up to 156 kb/s within an FM 200 kHz channel. The digital transmission is based on continuous phase modulation (CPM) and a proper reduced-state sequence estimator. CPM is the digital equivalent of the analog FM and has a constant envelope, too. This is a great advantage, because on the one hand existing nonlinear amplifiers can be reused to achieve good efficiency and low out-of-band radiation, on the other hand it enables the broadcasting companies to reuse the existing infrastructure (amplifiers, antennas, frequency bands) which reduces the investment costs and improves the chances for an introduction of CPM as a new broadcasting standard. With the proposed method, the power level and the symbol rate of the transmitter signal is determined in a manner that the interference the CPM signal poses for the analog FM signal in adjacent channels remains below a level according to the radio frequency emission mask defined by international rules. Due to the multipath propagation of the transmitted signal, the transmission behavior of typical radio channels is characterized by high dispersion of up to 85 . For the parameterization of this demonstrator, the channel memory amounts 14 bits. Due to the implementation of the hardware, the symbol duration is different in this case from the one in . Since Viterbi detection is not feasible due to the number of channel states, detection is performed by a reduced-state sequence estimator that is able to eliminate the complete channel interferences by decision feedback . We will describe in this paper the underlying algorithms of synchronization and channel estimation, since they are important component- - s of a real receiver. To underline the suitability of the CPM based broadcasting scheme, we have conducted field tests in the city area of Hanover with a real broadcasting evaluation system based on the proposed CPM broadcasting scheme with support of the northern German broadcast service (NDR) in Hanover with encouraging results. View full abstract»

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  • Modulation and Pre-Equalization Method to Minimize Time Delay in Equalization Digital On-Channel Repeater

    Page(s): 249 - 256
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (1454 KB) |  | HTML iconHTML  

    This paper presents novel modulation and pre-equalization methods to minimize a signal processing time delay in the equalization digital on-channel repeater (EDOCR) for the ATSC terrestrial digital TV system. The proposed modulation method uses equi-ripple (ER) filter for vestigial side bands (VSB) pulse shaping instead of conventional square root raised cosine (SRRC) filter. And the proposed pre-equalization method calculates pre-equalizer filter coefficients by comparing a baseband signal as a reference signal and a demodulated repeater output signal, and then creates new VSB pulse shaping filter coefficients by the convolution of the ER filter and the pre-equalizer filter coefficients. The new VSB pulse shaping filter minimizes the time delay of EDOCR by adjusting the number of its pre-taps and also compensates the linear distortions due to the use of the ER filter and mask filter. View full abstract»

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  • An Overview: Peak-to-Average Power Ratio Reduction Techniques for OFDM Signals

    Page(s): 257 - 268
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (764 KB) |  | HTML iconHTML  

    One of the challenging issues for Orthogonal Frequency Division Multiplexing (OFDM) system is its high Peak-to-Average Power Ratio (PAPR). In this paper, we review and analysis different OFDM PAPR reduction techniques, based on computational complexity, bandwidth expansion, spectral spillage and performance. We also discuss some methods of PAPR reduction for multiuser OFDM broadband communication systems. View full abstract»

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  • Preventing Interference to DTV Broadcasting in Every Market From Unlicensed or Uncontrolled Clusters of Broadband Devices on Unoccupied DTV Channels

    Page(s): 269 - 275
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (782 KB) |  | HTML iconHTML  

    The threat of interference to licensed DTV by clusters of unlicensed and uncontrolled broadband devices (BDs) transmitting simultaneously on unoccupied DTV channels remains. DTV channels in major U.S. cities could be victimized by interference from unlicensed or uncontrollable clusters. This paper shows how and why interference by clusters of broadband devices would be significantly higher than interference by individual broadband devices or by interference from clusters of single-tone devices. This paper also provides a real-world assessment of the maximum interference that consumer-grade receivers can accept from clusters of broadband devices operating on unoccupied DTV channels. To prevent interference to DTV and to maximize spectral efficiency individual base stations would have to be licensed as part of a network, and portable unlicensed devices would have to be equipped with dual DTV tuners with GPS chips. View full abstract»

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  • A Novel Clock Recovery Scheme for ATSC Receivers

    Page(s): 276 - 282
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (376 KB) |  | HTML iconHTML  

    This paper presents a method of using the field sync signal to perform clock recovery for ATSC receivers. This approach ensures a fast, reliable, and accurate receiver clock recovery even under severely distorted channel conditions. View full abstract»

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  • An Improved Sampling Frequency Offset Estimator for OFDM-Based Digital Radio Mondiale Systems

    Page(s): 283 - 286
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (244 KB) |  | HTML iconHTML  

    After coarse synchronization in orthogonal frequency division multiplexing (OFDM) systems, there might still be a residual frequency offset (RFO) and a sampling clock frequency offset (SFO), which seriously degrade the performance of the systems. This paper suggests a simple way of estimating the SFO in OFDM-based digital radio mondiale (DRM) system. To demonstrate the efficiency of the proposed SFO estimator, comparisons are made with other existing estimators in terms of mean square error (MSE) performance, estimation range, and complexity. View full abstract»

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  • Estimation of Inchannel-Interference to Digital Radio Mondiale (DRM) Signals During Operation

    Page(s): 287 - 295
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (459 KB) |  | HTML iconHTML  

    This paper presents two novel interference measurement estimators for the DRM (Digital Radio Mondiale) system. They are based on the PSD (Power Spectral Density) estimation of the received spectrum, and provide interference estimation whilst the DRM transmitter is in operation. The first estimator provides successful detection of in-channel narrowband interference. If the interferer is an AM co-channel signal, the second estimator takes advantage of the specific characteristics of the DRM modulation to provide accurate measurement of the signal-to-interference ratio value. This allows protection ratio calculus and failure detection caused by interference. View full abstract»

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  • Region of Interest-Based Adaptive Multimedia Streaming Scheme

    Page(s): 296 - 303
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (548 KB) |  | HTML iconHTML  

    Adaptive multimedia streaming aims at adjusting the transmitted content based on the available bandwidth such as losses that often severely affect the end-user perceived quality are minimized and consequently the transmission quality increases. Current solutions affect equally the whole viewing area of the multimedia frames, despite research showing that there are regions on which the viewers are more interested in than on others. This paper presents a novel region of interest-based adaptive scheme (ROIAS) for multimedia streaming that when performing transmission-related quality adjustments, selectively affects the quality of those regions of the image the viewers are the least interested in. As the quality of the regions the viewers are the most interested in will not change (or will involve little change), the proposed scheme provides higher overall end-user perceived quality than any of the existing adaptive solutions. View full abstract»

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  • Hybrid Broadcasting With Small Buffer Demand and Waiting Time for Video-on-Demand Applications

    Page(s): 304 - 311
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (1312 KB) |  | HTML iconHTML  

    One way to broadcast a popular video is to partition the video into segments, which are transmitted on several channels currently and periodically. The approach lets multiple users share channels, and thus obtains high bandwidth utilization. Many previous studies such as the recursive frequency-splitting (RFS) and harmonic broadcasting schemes focus on decreasing clients' waiting time. Another issue on reduction of clients' buffer demands is also important, especially for the goal to provide video services using limited-capability client devices such as PDAs and set-top boxes (STBs). Related work includes the skyscraper broadcasting (SkB), client-centric approach (CCA), greedy disk-conserving broadcasting (GDB), and reverse fast broadcasting (RFB) schemes. By combining RFS and RFB, this paper designs a hybrid broadcasting scheme (HyB), which exhibits a good tradeoff between client buffering spaces and waiting time. In comparison with SkB, CCA, GDB, RFB, and RFS, HyB requires smallest buffers, only 25% of video size. For waiting time, the scheme also outperforms all the schemes, except RFS. View full abstract»

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  • A Robust Resolution-Enhancement Scheme for Video Transmission Over Mobile Ad-Hoc Networks

    Page(s): 312 - 321
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    Historically, Error-Resilient (ER) video transmission and Super-Resolution (SR) image reconstruction techniques have evolved separately. In this paper, we propose a coordinated application of ER and SR to enhance the resolution of image transmitted over mobile ad-hoc networks. In order to combat error propagation, a flexible multiple description coding method based on shifted 3-D SPIHT (3-D Set Partitioning In Hierarchical Trees) algorithm is presented to generate variable independent descriptions (substreams) according to the network condition. And then, a novel unequal error protection strategy based on the priority level is provided to assign a higher level of error protection to more important parts of bitstream. Moreover, a robust SR algorithm is proposed in the presence of different kinds of packet loss rate to enhance the image resolution. Experimental results indicate that the proposed robust resolution-enhancement scheme outperforms the competing methods from the aspects of PSNR (Peak-Signal-to-Noise Ratio) and visual quality under different packet loss rates. View full abstract»

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  • RF Performance of T-DAB Receivers

    Page(s): 322 - 328
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (703 KB) |  | HTML iconHTML  

    In every wireless system, the weakest link determines the performance of the network. In this paper the Radio Frequency (RF) performance of both band III and L-band Terrestrial Digital Audio Broadcasting (T-DAB) consumer receivers are discussed. The receivers have been tested based on the EN 50248 standard. The test results show that the average consumer receiver for band III meets the requirements set by EN 50248, except for the non-adjacent interferer experiments. In this experiment, the average consumer receiver performs up to 10 dB worse than required. In addition, the experiments reveal that there is a large difference in performance between consumer receivers. Besides band III, also L-band consumer receivers have been evaluated. The results of the L-band experiments show that the consumer receivers are not capable of decoding a DAB signal with a COST207 rural area channel model in case of T-DAB mode IV. Network operators should for this reason use mode II for the L-band and should expect a larger influence of non-adjacent interference on receiver performance in band III than anticipated based on EN 50248. View full abstract»

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  • 58th Annual IEEE Broadcast Symposium

    Page(s): 329
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    Freely Available from IEEE
  • IEEE Broadcast Technology Society Tutorial at IBC

    Page(s): 330
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    Provides notice of upcoming conference events of interest to practitioners and researchers. View full abstract»

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  • IEEE International Symposium on Broadband Multimedia Systems and Broadcasting

    Page(s): 331
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    Freely Available from IEEE
  • 27th International Conference on Consumer Electronics 2009

    Page(s): 332
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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

Aims & Scope

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

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Editor-in-Chief
Yiyan Wu
Communications Research Ctr Canada