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IEEE Signal Processing Letters

Issue 10 • Date Oct. 2005

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Displaying Results 1 - 23 of 23
  • Table of contents

    Publication Year: 2005, Page(s):c1 - c4
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  • IEEE Signal Processing Letters publication information

    Publication Year: 2005, Page(s): c2
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  • Optimal time segmentation for overlap-add systems with variable amount of window overlap

    Publication Year: 2005, Page(s):665 - 668
    Cited by:  Papers (4)  |  Patents (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (184 KB) | HTML iconHTML

    In this letter, we propose a new best basis search algorithm for computing the optimal time segmentation of a signal, given a predefined cost measure. The new algorithm solves a problem that arises when the individual signal segments are windowed and overlap-add is applied between adjacent signal segments. When windows having a variable tail shape are employed, the minimization of a cost measure i... View full abstract»

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  • On performance of sphere decoding and Markov chain Monte Carlo detection methods

    Publication Year: 2005, Page(s):669 - 672
    Cited by:  Papers (36)  |  Patents (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (168 KB) | HTML iconHTML

    In a recent work, it has been found that the suboptimum detectors that are based on Markov chain Monte Carlo (MCMC) simulation techniques perform significantly better than their sphere decoding (SD) counterparts. In this letter, we explore the sources of this difference and show that a modification to existing sphere decoders can result in some improvement in their performance, even though they st... View full abstract»

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  • Blind adaptive multiuser detection based on affine projection algorithm

    Publication Year: 2005, Page(s):673 - 676
    Cited by:  Papers (15)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (184 KB) | HTML iconHTML

    In this letter, we introduce a novel blind multiuser detector based on the affine projection algorithm (APA) for direct-sequence code-division multiple-access (DS-CDMA) systems. Computational complexities of least mean-squares (LMS), recursive least squares (RLS), Kalman, and APA-based blind multiuser detection algorithms are compared. The proposed technique has similar convergence and tracking pr... View full abstract»

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  • Optimal correlating transform for erasure channels

    Publication Year: 2005, Page(s):677 - 680
    Cited by:  Papers (6)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (192 KB) | HTML iconHTML

    In this letter, we derive a gradient-based algorithm for computing the optimal transform when coefficients are transmitted over an erasure channel whose statistics are known. The discrete transform introduces correlation among the coefficients with consequent performance improvement against losses. Simulations show appreciable improvements over standard schemes and also good robustness when loss p... View full abstract»

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  • Image denoising algorithm via doubly local Wiener filtering with directional windows in wavelet domain

    Publication Year: 2005, Page(s):681 - 684
    Cited by:  Papers (51)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (496 KB) | HTML iconHTML

    Local Wiener filtering in the wavelet domain is an effective image denoising method of low complexity. In this letter, we propose a doubly local Wiener filtering algorithm, where the elliptic directional windows are used for different oriented subbands in order to estimate the signal variances of noisy wavelet coefficients, and the two procedures of local Wiener filtering are performed on the nois... View full abstract»

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  • A novel objective no-reference metric for digital video quality assessment

    Publication Year: 2005, Page(s):685 - 688
    Cited by:  Papers (30)  |  Patents (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (160 KB) | HTML iconHTML

    A novel objective no-reference metric is proposed for video quality assessment of digitally coded videos containing natural scenes. Taking account of the temporal dependency between adjacent images of the videos and characteristics of the human visual system, the spatial distortion of an image is predicted using the differences between the corresponding translational regions of high spatial comple... View full abstract»

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  • Statistical voice activity detection using a multiple observation likelihood ratio test

    Publication Year: 2005, Page(s):689 - 692
    Cited by:  Papers (82)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (216 KB) | HTML iconHTML

    Currently, there are technology barriers inhibiting speech processing systems that work in extremely noisy conditions from meeting the demands of modern applications. This letter presents a new voice activity detector (VAD) for improving speech detection robustness in noisy environments and the performance of speech recognition systems. The algorithm defines an optimum likelihood ratio test (LRT) ... View full abstract»

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  • Fast decomposition of filterbanks for the state-of-the-art audio coding

    Publication Year: 2005, Page(s):693 - 696
    Cited by:  Papers (6)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (224 KB) | HTML iconHTML

    This letter derives fast decomposition for the quadrature mirror filterbanks (QMFs) of the low power spectral band replication (SBR) tools in the MPEG high efficiency advanced audio coding (HE AAC) decoder. In contrast with the standard method where computation-intensive matrix operations are employed in the QMF, the proposed method decomposes the matrix operations into conventional discrete cosin... View full abstract»

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  • Synthesis filters design for coding gain in oversampled filter banks

    Publication Year: 2005, Page(s):697 - 700
    Cited by:  Papers (9)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (224 KB) | HTML iconHTML

    In this letter, we study the impact of the design freedom brought about by oversampling in perfect reconstruction oversampled filter banks, on the choice of synthesis filters that maximize the coding gain. In particular, based on the expression of the coding gain for the oversampled case, we show the dependency of the coding gain on both analysis and synthesis filters. We explore how the choice of... View full abstract»

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  • A fast algorithm for bidimensional EMD

    Publication Year: 2005, Page(s):701 - 704
    Cited by:  Papers (123)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (448 KB) | HTML iconHTML

    In this letter, we describe a new method for bidimensional empirical mode decomposition (EMD). This decomposition is based on Delaunay triangulation and on piecewise cubic polynomial interpolation. Particular attention is devoted to boundary conditions that are crucial for the feasibility of the bidimensional EMD. The study of the behavior of the decomposition on a different kind of image shows it... View full abstract»

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  • A new chirp scaling algorithm based on the fractional Fourier transform

    Publication Year: 2005, Page(s):705 - 708
    Cited by:  Papers (19)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (240 KB) | HTML iconHTML

    The fractional Fourier transform (FrFT), which is a generalized form of the well-known Fourier transform, has only recently started to appear in the field of signal processing. This has opened up the possibility of a new range of potentially promising and useful applications. In this letter, we develop a new FrFT-based chirp scaling algorithm (CSA) and compare its performance with the classical CS... View full abstract»

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  • DOA estimation via a network of dumb sensors under the SENMA paradigm

    Publication Year: 2005, Page(s):709 - 712
    Cited by:  Papers (8)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (184 KB) | HTML iconHTML

    Following the SENMA concept, we consider a wireless network of very dumb and cheap sensors, polled by a travelling "rover". Sensors are randomly placed and isotropic: Individually, they have no ability to resolve the direction of arrival (DOA) of an acoustic wave. However, they do observe the wavefront at different times. We assume that the communication load must be as limited as possible, so tha... View full abstract»

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  • Phase-mode versus delay-and-sum spherical microphone array processing

    Publication Year: 2005, Page(s):713 - 716
    Cited by:  Papers (52)  |  Patents (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (152 KB) | HTML iconHTML

    Phase-mode spherical microphone array processing, also known as spherical harmonic array processing, has been recently studied for various applications. The spherical array configuration provides desired three-dimensional symmetry, while the phase modes provide frequency-independent spatial processing. This letter employs the spherical harmonic framework to compare the well-known delay-and-sum to ... View full abstract»

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  • On source association of DOA estimation under multipath propagation

    Publication Year: 2005, Page(s):717 - 720
    Cited by:  Papers (5)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (168 KB) | HTML iconHTML

    For direction of arrival (DOA) estimation under a multipath environment, algorithms exist to estimate the DOAs of all paths associated with different sources, by employing various schemes to cope with coherent signals induced by multipath. Most of these methods do not provide any information on which source a detected path belongs to, i.e., source association. However, information on source associ... View full abstract»

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  • Artifact removal from electroencephalograms using a hybrid BSS-SVM algorithm

    Publication Year: 2005, Page(s):721 - 724
    Cited by:  Papers (51)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (232 KB) | HTML iconHTML

    Artifacts such as eye blinks and heart rhythm (ECG) cause the main interfering signals within electroencephalogram (EEG) measurements. Therefore, we propose a method for artifact removal based on exploitation of certain carefully chosen statistical features of independent components extracted from the EEGs, by fusing support vector machines (SVMs) and blind source separation (BSS). We use the seco... View full abstract»

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  • Blind channel estimation using zero-lag slice of third-order moment

    Publication Year: 2005, Page(s):725 - 727
    Cited by:  Papers (6)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (144 KB) | HTML iconHTML

    An iterative algorithm is presented for blind channel estimation of a nonminimum phase system using the zero-lag slice (ZS) of its third-order moment (TOM) only. The proposed method has simple computations because it is performed by using simple one-dimensional (1-D) operations with fast convergency and needs calculation of the ZS only. Furthermore, our method achieves good results since the ZS es... View full abstract»

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  • IEEE Signal Processing Letters Information for authors

    Publication Year: 2005, Page(s):728 - 729
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  • International Conference on Image Processing (ICIP 2006)

    Publication Year: 2005, Page(s): 730
    Request permission for commercial reuse | PDF file iconPDF (591 KB)
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  • IEEE Odyssey 2006: The Speaker and Language Recognition Workshop

    Publication Year: 2005, Page(s): 731
    Request permission for commercial reuse | PDF file iconPDF (641 KB)
    Freely Available from IEEE
  • IEEE Signal Processing Society 2006 International Workshop on Multimedia Signal Processing

    Publication Year: 2005, Page(s): 732
    Request permission for commercial reuse | PDF file iconPDF (165 KB)
    Freely Available from IEEE
  • IEEE Signal Processing Society Information

    Publication Year: 2005, 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.

Full Aims & Scope

Meet Our Editors

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