ALBERT

All Library Books, journals and Electronic Records Telegrafenberg

X
feed icon rss

Ihre E-Mail wurde erfolgreich gesendet. Bitte prüfen Sie Ihren Maileingang.

Leider ist ein Fehler beim E-Mail-Versand aufgetreten. Bitte versuchen Sie es erneut.

Vorgang fortführen?

Exportieren
Filter
  • Bücher
  • Zeitschriften
  • Artikel  (1.777)
  • IEEE Signal Processing Letters  (1.777)
  • 1267
  • Elektrotechnik, Elektronik, Nachrichtentechnik  (1.777)
  • Wirtschaftswissenschaften
  • Architektur, Bauingenieurwesen, Vermessung
  • 1
    facet.materialart.
    Unbekannt
    Detection of Glottal Activity Using Different Attributes of Source Information (2015)
    Institute of Electrical and Electronics Engineers (IEEE)
    Details
    Publikationsdatum: 2015-08-04
    Beschreibung: The major activity during speech production is glottal activity and is earlier detected using strength of excitation (SoE). This work uses the normalized autocorrelation peak strength (NAPS) and higher order statistics (HOS) as additional features for detecting glottal activity. The three features, namely, SoE, NAPS, and HOS, are, respectively indicators of different attributes of glottal activity, namely, energy, periodicity, and asymmetrical nature of the resulting source signal. The effectiveness of these features is analyzed using the differential electroglottograph signal, zero-frequency filtered signal, and integrated linear prediction residual, as representatives of source signal. The combination of glottal activity information from the three features outperforms any single of them, demonstrating different information represented by each of these features.
    Print ISSN: 1070-9908
    Digitale ISSN: 1558-2361
    Thema: Elektrotechnik, Elektronik, Nachrichtentechnik
    Publiziert von Institute of Electrical and Electronics Engineers (IEEE) im Namen von The IEEE Signal Processing Society.
    Standort Signatur Erwartet Verfügbarkeit
    BibTip Andere fanden auch interessant ...
    AKTUELLE ARTIKEL
  • 2
    facet.materialart.
    Unbekannt
    Robust Texture Classification by Aggregating Pixel-Based LBP Statistics (2015)
    Institute of Electrical and Electronics Engineers (IEEE)
    Details
    Publikationsdatum: 2015-08-04
    Beschreibung: This letter addresses the texture classification problem through a pixel-based local binary pattern (LBP) statistics aggregation mechanism. Real-world texture images often present challenges for classification algorithms in terms of intra-class variability due, among others, to variable illumination. The LBP operator, a state-of-the-art texture descriptor, possesses key properties for tackling real-world texture images: discriminative power and invariance against monotonic gray level changes. We propose a novel texture classification approach that increases the robustness of LBP-based methods with respect to any type of intra-class variations. The method locally characterizes each pixel with an LBP code histogram and globally computes the label of a textured image by aggregating pixel labels through a voting process. Our approach can be in principle applied to any LBP version, as it focuses on how statistics are computed from LBP codes. We show that the proposed pixel-based approach improves upon traditional LBP block-based approaches in terms of classification accuracy by up to 5.1 p.p. on the public Outex database for the classic LBP with various neighborhoods as well as for various LBP extensions.
    Print ISSN: 1070-9908
    Digitale ISSN: 1558-2361
    Thema: Elektrotechnik, Elektronik, Nachrichtentechnik
    Publiziert von Institute of Electrical and Electronics Engineers (IEEE) im Namen von The IEEE Signal Processing Society.
    Standort Signatur Erwartet Verfügbarkeit
    BibTip Andere fanden auch interessant ...
    AKTUELLE ARTIKEL
  • 3
    facet.materialart.
    Unbekannt
    Trigonometric Interpolation Kernel to Construct Deformable Shapes for User-Interactive Applications (2015)
    Institute of Electrical and Electronics Engineers (IEEE)
    Details
    Publikationsdatum: 2015-08-04
    Beschreibung: We present a new trigonometric basis function that is capable of perfectly reproducing circles, spheres and ellipsoids while at the same time being interpolatory. Such basis functions have the advantage that they allow to construct shapes through a sequence of control points that lie on their contour (2-D) or surface (3-D) which facilitates user-interaction, especially in 3-D. Our piecewise exponential basis function has finite support, which enables local control for shape modification. We derive and prove all the necessary properties of the kernel to represent shapes that can be smoothly deformed and show how idealized shapes such as ellipses and spheres can be constructed.
    Print ISSN: 1070-9908
    Digitale ISSN: 1558-2361
    Thema: Elektrotechnik, Elektronik, Nachrichtentechnik
    Publiziert von Institute of Electrical and Electronics Engineers (IEEE) im Namen von The IEEE Signal Processing Society.
    Standort Signatur Erwartet Verfügbarkeit
    BibTip Andere fanden auch interessant ...
    AKTUELLE ARTIKEL
  • 4
    facet.materialart.
    Unbekannt
    On the Average Directivity Factor Attainable With a Beamformer Incorporating Null Constraints (2015)
    Institute of Electrical and Electronics Engineers (IEEE)
    Details
    Publikationsdatum: 2015-08-07
    Beschreibung: The directivity factor (DF) of a beamformer describes its spatial selectivity and ability to suppress diffuse noise which arrives from all directions. For a given array constellation, it is possible to select beamforming weights which maximize the DF for a particular look-direction, while enforcing nulls for a set of undesired directions. In general, the resulting DF is dependent upon the specific look- and null directions. Using the same array, one may apply a different set of weights designed for any other feasible set of look- and null directions. In this contribution, we show that when the optimal DF is averaged over all look directions, the result equals the number of sensors minus the number of null constraints. This result holds regardless of the positions and spatial responses of the individual sensors and regardless of the null directions. The result generalizes to more complex wave-propagation domains (e.g., reverberation).
    Print ISSN: 1070-9908
    Digitale ISSN: 1558-2361
    Thema: Elektrotechnik, Elektronik, Nachrichtentechnik
    Publiziert von Institute of Electrical and Electronics Engineers (IEEE) im Namen von The IEEE Signal Processing Society.
    Standort Signatur Erwartet Verfügbarkeit
    BibTip Andere fanden auch interessant ...
    AKTUELLE ARTIKEL
  • 5
    facet.materialart.
    Unbekannt
    Robust Design of Transmit Waveform and Receive Filter For Colocated MIMO Radar (2015)
    Institute of Electrical and Electronics Engineers (IEEE)
    Details
    Publikationsdatum: 2015-08-04
    Beschreibung: We consider the problem of angle-robust joint transmit waveform and receive filter design for colocated multiple-input multiple-output (MIMO) radar, in the presence of signal-dependent interferences. The design problem is cast as a max-min optimization problem to maximize the worst-case output signal-to-interference-plus-noise-ratio (SINR) with respect to the unknown angle of the target of interest. Based on rank-one relaxation and semi-definite programming (SDP) representation of a nonnegative trigonometric polynomial, a cyclic optimization algorithm is proposed to tackle this problem. The effectiveness of the proposed method is illustrated via numerical examples.
    Print ISSN: 1070-9908
    Digitale ISSN: 1558-2361
    Thema: Elektrotechnik, Elektronik, Nachrichtentechnik
    Publiziert von Institute of Electrical and Electronics Engineers (IEEE) im Namen von The IEEE Signal Processing Society.
    Standort Signatur Erwartet Verfügbarkeit
    BibTip Andere fanden auch interessant ...
    AKTUELLE ARTIKEL
  • 6
    facet.materialart.
    Unbekannt
    Regularized Covariance Matrix Estimation via Empirical Bayes (2015)
    Institute of Electrical and Electronics Engineers (IEEE)
    Details
    Publikationsdatum: 2015-08-07
    Beschreibung: An Empirical Bayes formalization of the regularized covariance estimation problem is proposed for (possibly high-dimensional, low-sample) normal variates. A simple iteration is provided to automatically adjust the shrinkage level, which provably converges to the maximum likelihood hyperparameter estimation for any choice of the starting point. The proposed approach is effective and can outperform both MSE-optimized diagonal loading and the Rao–Blackwell Leidot–Wolf estimator in terms of covariance-matrix-specific metrics.
    Print ISSN: 1070-9908
    Digitale ISSN: 1558-2361
    Thema: Elektrotechnik, Elektronik, Nachrichtentechnik
    Publiziert von Institute of Electrical and Electronics Engineers (IEEE) im Namen von The IEEE Signal Processing Society.
    Standort Signatur Erwartet Verfügbarkeit
    BibTip Andere fanden auch interessant ...
    AKTUELLE ARTIKEL
  • 7
    facet.materialart.
    Unbekannt
    A Low-Complexity Near-ML Differential Spatial Modulation Detector (2015)
    Institute of Electrical and Electronics Engineers (IEEE)
    Details
    Publikationsdatum: 2015-06-06
    Beschreibung: Differential spatial modulation (DSM) is a newly-emerging differential scheme tailored to the spatial modulation technique, which selects only one among a group of antennas for transmission at any time instant. DSM, however, gives rise to prohibitive search complexity when the number of transmit antennas is large. In this letter, a low-complexity suboptimal detector is proposed for DSM. It is designed based on the maximum-likelihood criterion but takes more candidates for the antenna activation orders into account. The detection is performed in two steps: the first step is to confine the number of candidates for the modulated symbols to a small portion by exploiting the symmetry of the signal constellation; the second step is to select the most likely modulated symbols from the output of the first step according to the determined antenna activation order via a Viterbi-like algorithm. Analyses and simulations show that the proposed detector achieves near-optimal performance yet largely reduces the search complexity.
    Print ISSN: 1070-9908
    Digitale ISSN: 1558-2361
    Thema: Elektrotechnik, Elektronik, Nachrichtentechnik
    Publiziert von Institute of Electrical and Electronics Engineers (IEEE) im Namen von The IEEE Signal Processing Society.
    Standort Signatur Erwartet Verfügbarkeit
    BibTip Andere fanden auch interessant ...
    AKTUELLE ARTIKEL
  • 8
    facet.materialart.
    Unbekannt
    Similarity Validation Based Nonlocal Means Image Denoising (2015)
    Institute of Electrical and Electronics Engineers (IEEE)
    Details
    Publikationsdatum: 2015-08-14
    Beschreibung: Nonlocal means is one of the well known and mostly used image denoising methods. The conventional nonlocal means approach uses weighted version of all patches in a search neighbourhood to denoise the center patch. However, this search neighbourhood can include some dissimilar patches. In this letter, we propose a pre-processing hard thresholding algorithm that eliminates those dissimilar patches. Consequently, the method improves the performance of nonlocal means. The threshold is calculated based on the distribution of distances of noisy similar patches. The method denoted by Similarity Validation Based Nonlocal Means (NLM-SVB) shows improvement in terms of PSNR and SSIM of the retrieved image in comparison with nonlocal means and some recent variations of nonlocal means.
    Print ISSN: 1070-9908
    Digitale ISSN: 1558-2361
    Thema: Elektrotechnik, Elektronik, Nachrichtentechnik
    Publiziert von Institute of Electrical and Electronics Engineers (IEEE) im Namen von The IEEE Signal Processing Society.
    Standort Signatur Erwartet Verfügbarkeit
    BibTip Andere fanden auch interessant ...
    AKTUELLE ARTIKEL
  • 9
    facet.materialart.
    Unbekannt
    Time–Frequency Filtering Based on Spectrogram Zeros (2015)
    Institute of Electrical and Electronics Engineers (IEEE)
    Details
    Publikationsdatum: 2015-08-11
    Beschreibung: For a proper choice of the analysis window, a short-time Fourier transform is known to be completely characterized by its zeros, which coincide with those of the associated spectrogram. A simplified representation of the time-frequency structure of a signal can therefore be given by the Delaunay triangulation attached to spectrogram zeros. In the case of multicomponent nonstationary signals embedded in white Gaussian noise, it turns out that each time–frequency domain attached to a given component can be viewed as the union of adjacent Delaunay triangles whose edge length is an outlier as compared to the distribution in noise-only regions. Identifying such domains offers a new way of disentangling the different components in the time–frequency plane, as well as of reconstructing the corresponding waveforms.
    Print ISSN: 1070-9908
    Digitale ISSN: 1558-2361
    Thema: Elektrotechnik, Elektronik, Nachrichtentechnik
    Publiziert von Institute of Electrical and Electronics Engineers (IEEE) im Namen von The IEEE Signal Processing Society.
    Standort Signatur Erwartet Verfügbarkeit
    BibTip Andere fanden auch interessant ...
    AKTUELLE ARTIKEL
  • 10
    facet.materialart.
    Unbekannt
    HOG-Dot: A Parallel Kernel-Based Gradient Extraction for Embedded Image Processing (2015)
    Institute of Electrical and Electronics Engineers (IEEE)
    Details
    Publikationsdatum: 2015-08-11
    Beschreibung: In this letter, we propose HOG-Dot, a method for the direct computation of the polar image gradients coordinates from the pixels values. The proposed algorithm, to be used as the first step of the Histogram of Oriented Gradient (HOG) pipeline, approximates the exact gradient with its projection onto a versor chosen among the projection plane set. Instead of non linear computations, the HOG-Dot method exploits linear operations while introducing a bounded approximation error with respect to other HOG approaches, thus resulting a more suitable solution for embedded devices. Concerning the state of the art, it also achieves improved accuracy with the mathematical spatial gradient formulation .
    Print ISSN: 1070-9908
    Digitale ISSN: 1558-2361
    Thema: Elektrotechnik, Elektronik, Nachrichtentechnik
    Publiziert von Institute of Electrical and Electronics Engineers (IEEE) im Namen von The IEEE Signal Processing Society.
    Standort Signatur Erwartet Verfügbarkeit
    BibTip Andere fanden auch interessant ...
    AKTUELLE ARTIKEL
Schließen ⊗
Diese Webseite nutzt Cookies und das Analyse-Tool Matomo. Weitere Informationen finden Sie hier...