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IEEE Signal Processing Letters

Issue 2 • Date Feb. 2011

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Displaying Results 1 - 25 of 26
  • [Front cover]

    Publication Year: 2011, Page(s): C1
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  • IEEE Signal Processing Letters publication information

    Publication Year: 2011, Page(s): C2
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  • Table of contents

    Publication Year: 2011, Page(s):81 - 82
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  • Beta-Divergence as a Subclass of Bregman Divergence

    Publication Year: 2011, Page(s):83 - 86
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (106 KB) | HTML iconHTML

    In this paper, we present a complete proof that the β-divergence is a particular case of Bregman divergence. This little-known result makes it possible to straightforwardly apply theorems about Bregman divergences to β-divergences. This is of interest for numerous applications since these divergences are widely used, for instance in non-negative matrix factorization (NMF). View full abstract»

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  • A Novel Low-Complexity HMM Similarity Measure

    Publication Year: 2011, Page(s):87 - 90
    Cited by:  Papers (9)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (268 KB) | HTML iconHTML

    In this letter, we propose a novel similarity measure for comparing Hidden Markov models (HMMs) and an efficient scheme for its computation. In the proposed approach, we probabilistically evaluate the correspondence, or goodness of match, between every pair of states in the respective HMMs, based on the concept of semi-Markov random walk. We show that this correspondence score reflects the contrib... View full abstract»

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  • Joint Relay Selection and Power Allocation for Two-Way Relay Networks

    Publication Year: 2011, Page(s):91 - 94
    Cited by:  Papers (82)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (171 KB) | HTML iconHTML

    In this letter, we present an optimal joint relay selection (RS) and power allocation scheme for two-way relay networks which aim to establish a communication link between two transceivers with the help of one relay. Our approach is based on the maximization of the smaller of the received signal-to-noise-ratios (SNRs) of the two transceivers under a total transmit power budget. We show that this p... View full abstract»

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  • A New Histogram Modification Based Reversible Data Hiding Algorithm Considering the Human Visual System

    Publication Year: 2011, Page(s):95 - 98
    Cited by:  Papers (42)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1274 KB) | HTML iconHTML

    In this letter, we propose an improved histogram modification based reversible data hiding technique. In the proposed algorithm, unlike the conventional reversible techniques, a data embedding level is adaptively adjusted for each pixel with a consideration of the human visual system (HVS) characteristics. To this end, an edge and the just noticeable difference (JND) values are estimated for every... View full abstract»

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  • Factored MLLR Adaptation

    Publication Year: 2011, Page(s):99 - 102
    Cited by:  Papers (5)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (159 KB) | HTML iconHTML

    One of the most popular approaches to parameter adaptation in hidden Markov model (HMM) based systems is the maximum likelihood linear regression (MLLR) technique. In this letter, we extend MLLR to factored MLLR (FMLLR) in which the MLLR parameters depend on a continuous-valued control vector. Since it is practically impossible to estimate the MLLR parameters for each control vector separately, we... View full abstract»

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  • Mean Square Error Estimation in Thresholding

    Publication Year: 2011, Page(s):103 - 106
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (225 KB) | HTML iconHTML

    We present a novel approach to estimating the mean square error (MSE) associated with any given threshold level in both hard and soft thresholding. The estimate is provided by using only the data that is being thresholded. This adaptive approach provides probabilistic confidence bounds on the MSE. The MSE bounds can be used to evaluate the denoising method. Our simulation results confirm that not ... View full abstract»

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  • An Iterative Approach to Near-Uniform Group-Delay Error Design of FIR Filters

    Publication Year: 2011, Page(s):107 - 110
    Cited by:  Papers (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (204 KB) | HTML iconHTML

    For a minimax finite impulse response filter, the group-delay error near the bandedges of the filter is usually much larger than the error elsewhere. A sigmoid function was recently introduced as a phase-error upper-bound function to effectively reduce the group-delay error near the bandedge. However, the manual selection of the function's parameters limits its flexible use in the design. This let... View full abstract»

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  • Time-Recursive IAA Spectral Estimation

    Publication Year: 2011, Page(s):111 - 114
    Cited by:  Papers (16)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (475 KB) | HTML iconHTML

    This letter presents computationally efficient time-updating algorithms of the recent Iterative Adaptive Approach (IAA) spectral estimation technique. By exploiting the inherently low displacement rank, together with the development of suitable Gohberg-Semencul (GS) representations, and the use of data dependent trigonometric polynomials, the proposed time-recursive IAA algorithm offers a reductio... View full abstract»

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  • Privacy Protection of Fingerprint Database

    Publication Year: 2011, Page(s):115 - 118
    Cited by:  Papers (8)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (419 KB) | HTML iconHTML

    A fingerprint authentication system for the privacy protection of the fingerprint template stored in a database is introduced here. The considered fingerprint data is a binary thinned fingerprint image, which will be embedded with some private user information without causing obvious abnormality in the enrollment phase. In the authentication phase, these hidden user data can be extracted from the ... View full abstract»

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  • High Speed Progressive Digital-Reversal Algorithm

    Publication Year: 2011, Page(s):119 - 121
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (233 KB) | HTML iconHTML

    This paper describes a number of fast digital-reversal algorithms based on progressive index mapping. The proposed digital-reversal approach can obtain higher efficiency by decreasing the number of index mapping operations, unrolling the innermost loop, and vectorizing data operations. Comparing with other digital-reversal algorithms, we find that the new approach have higher efficiency than the k... View full abstract»

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  • Letter-to-Sound Pronunciation Prediction Using Conditional Random Fields

    Publication Year: 2011, Page(s):122 - 125
    Cited by:  Papers (9)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (104 KB) | HTML iconHTML

    Pronunciation prediction, or letter-to-sound (LTS) conversion, is an essential task for speech synthesis, open vocabulary spoken term detection and other applications dealing with novel words. Most current approaches (at least for English) employ data-driven methods to learn and represent pronunciation “rules” using statistical models such as decision trees, hidden Markov models (HMM... View full abstract»

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  • Coherent Spectral Analysis of Asynchronously Sampled Signals

    Publication Year: 2011, Page(s):126 - 129
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (556 KB) | HTML iconHTML

    We propose a joint sparse signal recovery approach to coherent spectral analysis of irregularly sampled signals. These signals share the same frequencies, and are sampled asynchronously. Two types of solution procedures are considered. First one is a convex optimization approach, which optimizes a mixed l2,1-norm. The other method minimizes an approximation of l... View full abstract»

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  • Spectrogram Image Feature for Sound Event Classification in Mismatched Conditions

    Publication Year: 2011, Page(s):130 - 133
    Cited by:  Papers (36)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (295 KB) | HTML iconHTML

    In this letter, we present a novel feature extraction method for sound event classification, based on the visual signature extracted from the sound's time-frequency representation. The motivation stems from the fact that spectrograms form recognisable images, that can be identified by a human reader, with perception enhanced by pseudo-coloration of the image. The signal processing in our method is... View full abstract»

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  • Relay Selection in Dual-Hop Vehicular Networks

    Publication Year: 2011, Page(s):134 - 137
    Cited by:  Papers (21)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (351 KB) | HTML iconHTML

    In this letter, we investigate cooperative diversity with relay selection over cascaded Rayleigh fading channels. In particular, we analyze the performance of a relay selection scheme for cooperative vehicular networks with the decode-and-forward (DF) protocol. Only the “best” relay, which satisfies an index of merit, is selected. We ignore the direct transmission between the source ... View full abstract»

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  • Logarithmic Frequency Scale Parallel Filter Design With Complex and Magnitude-Only Specifications

    Publication Year: 2011, Page(s):138 - 141
    Cited by:  Papers (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (163 KB) | HTML iconHTML

    Recently, the fixed-pole design of second-order parallel filters has been introduced to accomplish arbitrary (e.g., logarithmic) frequency resolution for transfer function modeling and equalization. The frequency resolution is set by the pole frequencies, and the resulting filter response corresponds to the smoothed (moving-average filtered) version of the target frequency response. This letter pr... View full abstract»

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  • Comments on “Performance Analysis of Amplify-and-Forward Opportunistic Relaying in Rician Fading”

    Publication Year: 2011, Page(s):142 - 143
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (238 KB) | HTML iconHTML

    It has been pointed out that the asymptotic SER formula of the opportunistic relaying derived by B. Maham is erroneous. The correct SER approximation is therefore presented. It is concluded that opportunistic relaying provides the coding gain in high SNR of R! times less as compared with the repetition-based cooperation. The simulations are also conducted to substantiate the corrected SER formula. View full abstract»

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  • Reply to “Comments on Performance Analysis of Amplify-and-Forward Opportunistic Relaying in Rician Fading”

    Publication Year: 2011, Page(s): 143
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (189 KB) | HTML iconHTML

    First, I would like to thank the associate editor and the author of the Comment for bringing this issue to our attention. While I agree with the mentioned comment, I think the error is rather trivial. The difference is only on a proportional constant for the derived asymptotic expression. Since the main contributions of our paper were the SER expressions in Section III-A and the diversity analysis... View full abstract»

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  • Comments on "OFDM Transmission for Time-Based Range Estimation"

    Publication Year: 2011, Page(s): 144
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (35 KB) | HTML iconHTML

    The letter by Wang and Fattouche makes the claim that the Cramer-Rao lower bound (CRLB) for range estimation using orthogonal frequency division multiplexing (OFDM) signals is 4.8 dB lower than that of pseudo-noise (PN) signals. However, this is not the case. The sole reason for the 4.8 dB gain in the said letter is due to the fact that the authors implicitly used an uncommon pulse shaping filter ... View full abstract»

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  • Blank page

    Publication Year: 2011, Page(s):145 - 146
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  • IEEE Signal Processing Letters Information for authors

    Publication Year: 2011, Page(s):147 - 148
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  • IEEE copyright form

    Publication Year: 2011, Page(s):149 - 150
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  • IEEE Signal Processing Society Information

    Publication Year: 2011, Page(s): C3
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Aims & Scope

The IEEE Signal Processing Letters is a monthly, archival publication designed to provide rapid dissemination of original, cutting-edge ideas and timely, significant contributions in signal, image, speech, language and audio processing.

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Meet Our Editors

Editor-in-Chief
Peter Willett
University of Connecticut
Storrs, CT 06269
peter.willett@uconn.edu