By Topic

Broadcasting, IEEE Transactions on

Issue 3 • Date Sept. 2008

Filter Results

Displaying Results 1 - 25 of 25
  • Table of contents

    Page(s): C1
    Save to Project icon | Request Permissions | PDF file iconPDF (34 KB)  
    Freely Available from IEEE
  • IEEE Transactions on Broadcasting publication information

    Page(s): C2
    Save to Project icon | Request Permissions | PDF file iconPDF (40 KB)  
    Freely Available from IEEE
  • Content Extraction and Interpretation of Superimposed Captions for Broadcasted Sports Videos

    Page(s): 333 - 346
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (2145 KB) |  | HTML iconHTML  

    This paper illustrates how to interpret the superimposed caption box (SCB) in broadcasted sports videos of which the SCB template is presumably not given as a priori. The embedded captions in sports video programs represent digested key information of the video content. Most of the previous studies assume that the SCB template and the character bitmaps are known. The major contributions of this paper are (1) caption template extraction and identification, (2) symbol extraction and modeling, and (3) semantic interpretation of the identified captions and symbols. Experimental results show that the algorithm performs the SCB contents understanding for several commercial sports video programs. View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Procedure to Optimize Coverage and Throughput for a DVB-H System Based on Field Trials

    Page(s): 347 - 355
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (946 KB) |  | HTML iconHTML  

    A procedure to optimize the coverage and throughput for a DVB-H system is proposed. The performance of the system is evaluated by measurements for different modulation schemes, guard intervals, and MPE-FEC rates. Based on technical trial results, an optimal transmission scheme is proposed for a specific network, maximizing the coverage for a certain throughput requirement. This optimization will enable to select an optimal transmission scheme for future DVB-H trials and deployments. View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • A T-DAB Field Trial Using a Low-Mast Infrastructure

    Page(s): 356 - 370
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (3918 KB) |  | HTML iconHTML  

    A novel low-mast low-power terrestrial digital audio broadcasting (T-DAB) single frequency network topology is described and evaluated in this paper. For this purpose, a pilot network (band III and L-band) was constructed in Amsterdam, the Netherlands. The performance of the band III pilot network (channel 12B) is compared with the existing traditional high-power high-mast T-DAB network (channel 12C) of the public service broadcaster. An important goal is to investigate whether the pilot network can co-exist with an existing traditional T-DAB network. The field trial shows that a gap filler can effectively neutralize the adjacent channel interference of the pilot network on the existing T-DAB network. Moreover, the L-band pilot network is compared with both band III networks by assessing the indoor coverage of every network. For estimation of the indoor coverage, 34 objects were investigated. Both the indoor penetration loss for band III and L-band was determined for each object. Indoor coverage in a region is reached if 95% of the buildings or more have indoor coverage. Using this definition, the loss for band III is 21.6 dB and for L-band 24.6 dB. As a result we consider the indoor penetration loss values reported in literature as too optimistic. Also other parameters of the pilot network were measured, such as the frequency re-use distance. View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Performance Analysis of MF-TDMA Multi-Carrier Demultiplexer/Demodulators (MCDDs) in the Presence of Critical Degrading Factors

    Page(s): 371 - 382
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (906 KB) |  | HTML iconHTML  

    Two typical MCDD (multi-carrier demultiplexer/demodulator) architectures, M-MCD (multistage multicarrier demultiplexer) and PPF (polyphase FFT) suitable for multimedia service via the on-board processing (OBP) satellite, are analytically modeled and their error performances are numerically evaluated in the presence of five degrading factors including: narrow-band AWGN, carrier frequency offset, phase error, ISI and quantization error. Cumulative effects of these factors on the BERs of the two different MCDD structures are also assessed and compared for possible tradeoff under MF-TDMA (Multi-Frequency Time Division Multiplex Access) scheme using QPSK modulation. Results show that both architectures are commonly vulnerable to most degrading factors. However, combined effect of phase error with AWGN is more critical to M-MCD than PPF. In addition, PPF method proves to be more sensitive to quantization error than M-MCD. When all five degrading factors are considered, MCDD using PPF method exhibits better BER performance than that of M-MCD, especially when carrier phase error is significant. View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Transmitter Identification Signal Analyzer for Single Frequency Network

    Page(s): 383 - 393
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (1575 KB) |  | HTML iconHTML  

    A Single frequency network (SFN) design based on the Advanced Television Systems Committee (ATSC) terrestrial digital television (DTV) system normally causes interference among signals from multiple transmitters or repeaters in the network. The ATSC recommended practice (RP) A/111 introduces transmitter identification (TxID) signals embedded to the ATSC 8-VSB signals. A TxID signal analyzer is then used to detect the TxID signals and analyze the network. Following the analysis results, the SFN design can be managed by adjusting delay and power of multiple transmitters and repeaters. This paper presents basic concept of the Kasami sequence used as the TxID signals, and their insertion method to the ATSC 8-VSB signals. The structure of the TxID signal analyzer to efficiently detect TxID signals is proposed, and a theoretical approach to performance measurement of the TxID signal analyzer is discussed. In addition, computer simulation and laboratory test results are provided to evaluate the performance of the TxID signal analyzer. View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • A DFE Structure Using Quadrature Components of 8-VSB Signals

    Page(s): 394 - 400
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (1052 KB) |  | HTML iconHTML  

    In this paper, we present a decision feedback equalizer (DFE) that uses the quadrature components of 8-VSB signals in ATSC systems to mitigate multipath distortion efficiently. Unlike the conventional DFE structure for 8-VSB signals in which a real-valued feedback filter is used with real-valued decisions, the proposed DFE uses a complex-valued feedback filter with a complex-valued feedback sample generator. Due to the difficulty in analyzing a recursive system, we present a limited performance analysis on the proposed algorithm that a well-modeled feedback filter successfully cancels multipath channels with quadrature leakages in the absence of noise. For the performance comparison with conventional DFEs in realistic environments, we uses simulation methods. View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Public Key Broadcast Encryption Schemes With Shorter Transmissions

    Page(s): 401 - 411
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (602 KB) |  | HTML iconHTML  

    Broadcast encryption allows a sender to securely distribute messages to a dynamically changing set of users over an insecure channel. In a public key broadcast encryption (PKBE) scheme, this encryption is performed in the public key setting, where the public key is stored in a user's device, or directly transmitted to the receivers along with ciphertexts. In this paper, we propose two PKBE schemes for stateless receivers which are transmission-efficient. A distinctive feature in our first construction is that, different than existing schemes in the literature, only a fraction of the public key related to the set of intended receivers is required in the decryption process. This feature results in the first PKBE scheme with O(r) transmission cost and O(1) user storage cost for r revoked users. Our second construction is a generalized version of the first one providing a tradeoff between ciphertext size and public key size. With appropriate parametrization, we obtain a PKBE scheme with (Oradicn) transmission cost and O(1) user storage cost for any large set of n users. The transmission cost of our second scheme is at least 30% less than that of the recent result of Boneh et al.'s PKBE scheme, which is considered as being the current state-of-the-art. By combining the two proposed schemes, we suggest a PKBE scheme that achieves further shortened transmissions, while still maintaining O(1) user storage cost. The proposed schemes are secure against any number of colluders and do not require costly re-keying procedures followed by revocation of users. View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Redundancy Reduction Technique for Dual-Bitstream MPEG Video Streaming With VCR Functionalities

    Page(s): 412 - 418
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (355 KB) |  | HTML iconHTML  

    With the proliferation of online video contents, it is highly desirable that video streaming systems are able to provide fast and effective video browsing. However, the predictive coding techniques adopted in current compression standards such as MPEG severely complicate these browsing operations. One approach to achieve browsing functionalities is to store an additional reverse-encoded bitstream into the server. Unfortunately, this extra bitstream approximately doubles the storage requirement of the video server. In this paper, we make use of the redundancy inherent between the forward and reverse-encoded bitstreams in order to achieve a substantial reduction on the size of the reverse-encoded bitstream. A novel macroblock-selection strategy is then proposed in the server to access and manipulate various macroblocks from the forward and reverse-encoded bistreams to facilitate various browsing operations. Experimental results show that, as compared to the conventional dual-bitstream scheme, the new scheme significantly alleviates the storage increase due to the additional reverse-encoded bitstream. View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Performance Analysis of a Finite Duration Multichannel Delivery Method in IPTV

    Page(s): 419 - 429
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (907 KB) |  | HTML iconHTML  

    Reducing the channel change time is one of the major concerns of IPTV network deployment. This paper proposes multiple channels being delivered to household set top boxes, with a finite duration, to reduce channel change time. Unlike existing proprietary solutions that require additional equipment, or complex interactions between set top boxes and provisioning devices, the proposed method is easy to implement. We develop mathematical models to evaluate the bandwidth demand and channel change time of this method. We find that in a typical setup, the channel change time is reduced to 20%, yet the peak bandwidth increase on carrier's uplink is less than 50%. We compare the investigated method with existing ones, and argue that it is a promising alternative in terms of required bandwidth, channel change time and implementation complexity. View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Decoupled 3-D Zerotree Structure for Wavelet-Based Video Coding

    Page(s): 430 - 436
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (551 KB) |  | HTML iconHTML  

    A novel data structure is proposed for magnitude-ordering 3-D wavelet transform coefficients. This data structure consists of temporal 1-D orientation trees followed by spatial 2-D orientation trees. Based on this data structure, a coding algorithm is developed for the embedded coding of 3-D wavelet transform coefficients. Experiment results confirm that the proposed coding algorithm outperforms a conventional algorithm that uses asymmetric 3-D orientation trees. View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Seasonal Variation of LF/MF Sky-Wave Field Strengths

    Page(s): 437 - 440
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (119 KB) |  | HTML iconHTML  

    The most recent LF/MF sky-wave data bank has been revisited and reorganized by this author for the purpose of studying seasonal variation. Measured monthly median field strengths of about 100 propagation paths from different regions of the world have been tabulated and studied. Conventional wisdom suggests that field strengths are the strongest during spring and autumn and are the weakest during summer. The current study, which is based on a much larger data bank, suggests that the conventional wisdom is only true under certain conditions and only true in certain areas of the world. This paper attempts to discuss seasonal variation in more detail, both qualitatively and quantitatively. A number of representative examples will be given. Impact of other factors affecting seasonal variation will be pointed out and discussed also. View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Adaptive Concurrent Equalization Applied to Multicarrier OFDM Systems

    Page(s): 441 - 447
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (2168 KB) |  | HTML iconHTML  

    Receivers for wireless Orthogonal Frequency Division Multiplexing (OFDM) systems usually perform the channel estimation based on pilot carriers in known positions of the channel spectrum. Interpolation is applied between pilot carriers to determine the channel transfer function in all carrier frequencies. Channel variations along time are compensated by means of interpolation between successive channel estimates on the same carrier frequency. However, not rarely do fast channel variations exceed the time interpolator capability, as is the case for mobile operation. In this article we propose a new technique based on concurrent de- convolution, as a mean to further increase the time interpolator capability. Concurrent deconvolution, also known as concurrent equalization, is based on the concurrent operation of two stochastic gradient time-domain algorithms. One gradient-based algorithm minimizes a cost function that measures the received signal energy dispersion and the other minimizes the Euclidean distance between the received digital modulation symbols and the ones in the reference constellation which are assigned to each OFDM sub-channel. Results show that the proposed technique, when subsequently applied to the time interpolation stage, improves the system robustness for fast varying channels. The whole channel compensation computational cost is increased by the cost of a two coefficient multirate adaptive FIR filter, added only to those subcarriers at the FFT output to which a pilot sequence has not been assigned. View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Blind Compensation of Linear Amplitude Distortions

    Page(s): 448 - 453
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (184 KB) |  | HTML iconHTML  

    The estimation and the compensation of particular amplitude distortions, typically affecting the consumer-grade receivers in broadband satellite communications, are considered. The distortion filter is modeled as a linear function of the frequency with unknown slope. We present a novel slope estimator, analytically derived by exploiting the spectral properties of the distorted signal, which results to be unbiased and does not exhibit false locks in the scenarios of practical interest. Since an ideal slope compensator would require an unmanageable filtering, we focus on a low-complexity compensation filter that ensures nearly the same performance. Extensive simulation results prove the effectiveness and the robustness of the proposed solution, which can also work blindly at very low values of the signal-to-noise ratio. View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Near Optimal PRT Set Selection Algorithm for Tone Reservation in OFDM Systems

    Page(s): 454 - 460
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (340 KB) |  | HTML iconHTML  

    In the tone reservation (TR) scheme, it is known that finding the optimal peak reduction tone (PRT) set is equivalent to solving the secondary peak minimization problem. However, this problem cannot be solved for the practical number of tones because it is nondeterministic polynomial-time (NP)-hard. In this paper, two efficient methods for selecting a near optimal PRT set are proposed. The first method is a random search algorithm with reduced computational complexity based on the observation that the secondary peak value of the time domain kernel, which is obtained by inverse fast Fourier transforming the characteristic sequence of the PRT set, statistically tends to decrease as the variance of the time domain kernel decreases. The second method is a deterministic selection algorithm using the cyclic difference set. The near optimality of these methods is confirmed through the numerical analysis. View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Iterative Extrapolation for Channel Equalization in DVB-T Receivers

    Page(s): 461 - 467
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (973 KB) |  | HTML iconHTML  

    This paper proposes an iterative extrapolation method to improve the channel-equalization performance for DVB-T receivers. The coefficients of a one-tap equalizer are conventionally obtained by taking the reciprocals of the estimated channel coefficients. Inversion of the channel coefficients, however, may cause noise enhancement at those frequencies corresponding to spectral nulls. To reduce such undesirable noise amplification, iterative extrapolation based on the time-domain truncation is performed, resulting in smooth nulls. Simulation results show that the proposed method improves the channel-equalization performance compared to the conventional zero-forcing equalization method in terms of bit error rates in DVB-T receivers at all SNRs. View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • An Implementation of the Decision Feedback Equalizer Based on Delay-Matched Structure

    Page(s): 468 - 476
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (1041 KB) |  | HTML iconHTML  

    This paper presents a new equalizer structure named Delay-Matched Decision-Feedback Equalizer (DMDFE) which is an effective solution to the hardware implementation of time domain adaptive Decision-Feedback Equalizer (DFE) in single carrier modulated DTV system. The transposed structure combined with the conventional transversal filter is employed in DMDFE to reduce the ghost estimation delay of feedback filter in DFE. And the DMDFE provides a one-symbol period feedback ghost estimation which enables the new structure to have the same performance with ideal Least Mean Square (LMS) DFE. The DMDFE can cope with faster fading channel and longer post-echo than transposed DFE. Meanwhile the DMDFE saves more hardware resources than the transposed DFE. View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Combined NR Decoding With Decision Feedback Equalizer for Chinese DTTB Receiver

    Page(s): 477 - 481
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (429 KB) |  | HTML iconHTML  

    In this paper, the effect of the Minimum-Mean-Square Error Decision Feedback Equalizer (MMSE-DFE) when combined with decoding that is applied to the coded transmission, is studied. When the length of MMSE-DFE is large, it is more realizable to use the decoding value as the decision value. Here, the DFE using the Nordstrom-Robinson (NR) decoding value is proposed. Through simulation and by testing results, the DFE combined with NR decoding shows better performance than the traditional DFE. Moreover, this paper supports an approach to cancel partial residual Inter-Symbol Interference (ISI) that is caused by decision delay when DFE is combined with NR decoding. View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • A Transmit Diversity Scheme for TDS-OFDM System

    Page(s): 482 - 488
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (232 KB) |  | HTML iconHTML  

    Transmit diversity is especially important in broadcasting network. In this paper, a transmit diversity method is proposed for the Chinese National Digital terrestrial television broadcasting (DTTB) standard. The transmit diversity scheme is based on the design of orthogonal sequences which have perfect crosscorrelation and almost perfect autocorrelation characteristic. The characteristics of the proposed sequences can help for synchronization and channel estimation in time domain synchronous orthogonal frequency division multiplexing (TDS-OFDM) system. Simulations using space-time codes (STCs) in digital terrestrial/television multimedia broadcasting (DTMB) system with low density parity check coding (LDPC) show that the proposed transmit diversity method has about 1-2 dB signal-to-noise ratio (SNR) gain comparing with no diversity for QPSK and 16 QAM constellations at BER= 10-4, and it can avoid the appearance of BER floor for 64 QAM constellation. View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Comments on "On the Combining of the Amplitude and Phase Modulation in the Same Signal

    Page(s): 489
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (59 KB)  

    For original paper see Pliatsikas et al. (2005). In the present correspondence, we comment on the proposed phase modulation scheme described in the above paper. We also suggest revising Table I to eliminate possible confusion. View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • 58th Annual IEEE Broadcast Symposium

    Page(s): 490
    Save to Project icon | Request Permissions | PDF file iconPDF (459 KB)  
    Freely Available from IEEE
  • IEEE International Symposium on Broadband Multimedia Systems and Broadcasting

    Page(s): 491
    Save to Project icon | Request Permissions | PDF file iconPDF (490 KB)  
    Freely Available from IEEE
  • Special issue of the IEEE/OSA Journal of Display Technology for Transparent Electronics

    Page(s): 492
    Save to Project icon | Request Permissions | PDF file iconPDF (609 KB)  
    Freely Available from IEEE
  • IEEE Transactions on Broadcasting information for authors

    Page(s): C4 - C3
    Save to Project icon | Request Permissions | PDF file iconPDF (38 KB)  
    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.

Full Aims & Scope

Meet Our Editors

Editor-in-Chief
Yiyan Wu
Communications Research Ctr Canada