By Topic

IEEE Transactions on Signal Processing

Issue 4 • April 1998

Filter Results

Displaying Results 1 - 25 of 35
  • Guest Editorial Special Issue on Theory and Application of Filter Banks and Wavelet Transforms

    Publication Year: 1998, Page(s): 829
    Request permission for commercial reuse | PDF file iconPDF (7 KB)
    Freely Available from IEEE
  • Motion estimation using a complex-valued wavelet transform

    Publication Year: 1998, Page(s):1069 - 1084
    Cited by:  Papers (90)  |  Patents (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (808 KB)

    This paper describes a new motion estimation algorithm that is potentially useful for both computer vision and video compression applications. It is hierarchical in structure, using a separable two-dimensional (2-D) discrete wavelet transform (DWT) on each frame to efficiently construct a multiresolution pyramid of subimages. The DWT is based on a complex-valued pair of four-tap FIR filters with G... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Balanced multiwavelets theory and design

    Publication Year: 1998, Page(s):1119 - 1125
    Cited by:  Papers (131)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (276 KB)

    This article deals with multiwavelets, which are a generalization of wavelets in the context of time-varying filter banks and with their applications to signal processing and especially compression. By their inherent structure, multiwavelets are fit for processing multichannel signals. This is the main issue in which we are interested. First, we review material on multiwavelets and their links wit... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Optimal pyramidal decomposition for progressive multidimensional signal coding using optimal quantizers

    Publication Year: 1998, Page(s):1054 - 1068
    Cited by:  Papers (7)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (584 KB)

    Optimal hierarchical coding is sought, for progressive or scalable multidimensional signal transmission, by minimizing the variance of the error difference between the original image and its lower resolution renditions. The optimal, according to the above criterion, pyramidal coders are determined for images quantized using the optimal vector Lloyd-Max quantizers. A rigorous general statistical mo... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Wavelet functions to estimate velocity in spatiotemporal signals

    Publication Year: 1998, Page(s):1105 - 1118
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (504 KB)

    This paper establishes a framework to estimate velocity from spatiotemporal signals using the wavelet transform and multiresolution techniques. Initial theory is derived with the assumption that the spatiotemporal signal can be represented by a polynomial of order M. Wavelet functions are derived for polynomials of different degree from which the velocity can be estimated as the ratio of two of th... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Orthogonal multiwavelets with optimum time-frequency resolution

    Publication Year: 1998, Page(s):830 - 844
    Cited by:  Papers (44)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1028 KB)

    A procedure to design orthogonal multiwavelets with good time-frequency resolution is introduced. Formulas to compute the time-durations and the frequency-bandwidths of scaling functions and multiwavelets are obtained. Parameter expressions for the matrix coefficients of the multifilter banks that generate symmetric/antisymmetric scaling functions and multiwavelets supported in [O,N] are presented... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Formulas for orthogonal IIR wavelet filters

    Publication Year: 1998, Page(s):1138 - 1141
    Cited by:  Papers (34)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (132 KB)

    Explicit solutions are given for the rational function P(z) for two classes of IIR orthogonal two-band wavelet bases, for which the scaling filter is maximally flat. P(z) denotes the rational transfer function H(z)H(1/z), where H(z) is the (lowpass) scaling filter. The first is the class of solutions that are intermediate between the Daubechies (1992) and the Butterworth wavelets. It is found that... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Biorthogonal and nonuniform lapped transforms for transform coding with reduced blocking and ringing artifacts

    Publication Year: 1998, Page(s):1043 - 1053
    Cited by:  Papers (108)  |  Patents (88)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (292 KB)

    New lapped transforms are introduced. The lapped biorthononal transform (LBT) and hierarchical lapped biorthogonal transform (HLBT) are appropriate for image coding, and the modulated HLBT biorthogonal transform (MMLBT) and nonuniform modulated lapped biorthogonal transform (NMLBT) are appropriate for audio coding. The HLBT has a significantly lower computational complexity than the lapped orthogo... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Focused detection via multiresolution analysis

    Publication Year: 1998, Page(s):1094 - 1104
    Cited by:  Papers (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (428 KB)

    In many applications, there are strong discrepancies between the signal models assumed in the design phase and the actual signals encountered in the field. These discrepancies penalize significantly the performance of the matched filter that is fine tuned to the preassumed conditions. We propose a geometric framework that designs, via wavelet multiresolution-based techniques, a receiver whose perf... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Orthogonal transmultiplexers in communication: a review

    Publication Year: 1998, Page(s):979 - 995
    Cited by:  Papers (141)  |  Patents (9)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (404 KB)

    This paper presents conventional and emerging applications of orthogonal synthesis/analysis transform configurations (transmultiplexer) in communications. It emphasizes that orthogonality is the underlying concept in the design of many communication systems. It is shown that orthogonal filter banks (subband transforms) with proper time-frequency features can play a more important role in the desig... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Theory and design of signal-adapted FIR paraunitary filter banks

    Publication Year: 1998, Page(s):920 - 929
    Cited by:  Papers (63)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (404 KB)

    We study the design of signal-adapted FIR paraunitary filter banks, using energy compaction as the adaptation criterion. We present some important properties that globally optimal solutions to this optimization problem satisfy. In particular, we show that the optimal filters in the first channel of the filter bank are spectral factors of the solution to a linear semi-infinite programming (SIP) pro... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • A robust technique for image descreening based on the wavelet transform

    Publication Year: 1998, Page(s):1179 - 1184
    Cited by:  Papers (40)  |  Patents (9)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (240 KB)

    In this correspondence, a novel wavelet-based approach to recover continuous-tone (contone) images from halftone images is presented. Wavelet decomposition of the halftone image facilitates a series of spatial and frequency selective processing to preserve most of the original image contents while eliminating the halftone noise. Furthermore, optional nonlinear filtering can be applied as a postpro... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Sampling approximation of smooth functions via generalized coiflets

    Publication Year: 1998, Page(s):1133 - 1138
    Cited by:  Papers (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (296 KB)

    We present the sampling approximation power of a newly constructed class of compactly supported orthonormal wavelets called generalized coiflets. We study the accuracy of generalized coiflets-based sampling approximation of smooth functions by developing convergence rates for the pointwise approximation error as well as its LP-norm. We show: (i) that the L2-error due to the a... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Analysis of low bit rate image transform coding

    Publication Year: 1998, Page(s):1027 - 1042
    Cited by:  Papers (161)  |  Patents (13)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (756 KB)

    Calculations based on high-resolution quantizations prove that the distortion rate D(R¯) of an image transform coding is proportional to 2-2R when R¯ is large enough. In wavelet and block cosine bases, we show that if R¯<1 bit/pixel, then D(R¯) varies like R¯1-2γ, where γ remains of the order of 1 for most natural images. The improved p... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Design of hybrid filter banks for analog/digital conversion

    Publication Year: 1998, Page(s):956 - 967
    Cited by:  Papers (128)  |  Patents (41)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (336 KB)

    This paper presents design algorithms for hybrid filter banks (HFBs) for high-speed, high-resolution conversion between analog and digital signals. The HFB is an unconventional class of filter bank that employs both analog and digital filters. When used in conjunction with an array of slower speed converters, the HFB improves the speed and resolution of the conversion compared with the standard ti... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Wavelet-based statistical signal processing using hidden Markov models

    Publication Year: 1998, Page(s):886 - 902
    Cited by:  Papers (862)  |  Patents (8)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (452 KB)

    Wavelet-based statistical signal processing techniques such as denoising and detection typically model the wavelet coefficients as independent or jointly Gaussian. These models are unrealistic for many real-world signals. We develop a new framework for statistical signal processing based on wavelet-domain hidden Markov models (HMMs) that concisely models the statistical dependencies and non-Gaussi... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Efficient deformable filter banks

    Publication Year: 1998, Page(s):1168 - 1173
    Cited by:  Papers (18)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (240 KB)

    This article describes efficient schemes for the computation of a large number of differently scaled/oriented filtered versions of an image. We generalize the well-known steerable/scalable (“deformable”) filter bank structure by imposing X-Y separability on the basis filters. The resulting systems, designed by an iterative projections technique, achieve substantial reduction of the com... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • High-quality audio compression using an adaptive wavelet packet decomposition and psychoacoustic modeling

    Publication Year: 1998, Page(s):1085 - 1093
    Cited by:  Papers (45)  |  Patents (64)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (168 KB)

    This paper presents a technique to incorporate psychoacoustic models into an adaptive wavelet packet scheme to achieve perceptually transparent compression of high-quality (34.1 kHz) audio signals at about 45 kb/s. The filter bank structure adapts according to psychoacoustic criteria and according to the computational complexity that is available at the decoder. This permits software implementatio... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • On the least asymmetric wavelets

    Publication Year: 1998, Page(s):1125 - 1130
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (272 KB)

    The asymmetry of Daubechies' (1988, 1992) scaling functions and wavelets can be diminished by minimizing a special second moment in time for the wavelet-generating discrete-time filter. The moment is involved in an uncertainty relation for discrete-time signals. Other measures of asymmetry are addressed as well, and corresponding results are compared View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Design of regular nonseparable bidimensional wavelets using Grobner basis techniques

    Publication Year: 1998, Page(s):845 - 856
    Cited by:  Papers (14)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (516 KB)

    The design of two-dimensional (2-D) filter banks yielding orthogonality and linear-phase filters and generating regular wavelet bases is a difficult task involving the algebraic properties of multivariate polynomials. Using cascade forms implies dealing with nonlinear optimization. We turn the issue of optimizing the orthogonal linear-phase cascade from Kovacevic and Vetterli (1992) into a polynom... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • M-channel compactly supported biorthogonal cosine-modulated wavelet bases

    Publication Year: 1998, Page(s):1142 - 1151
    Cited by:  Papers (18)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (376 KB)

    We generalize the theory of compactly supported biorthogonal two-channel wavelet bases to M-channel. A sufficient condition for the M-channel perfect reconstruction filter banks to construct M-channel biorthogonal bases of compactly supported wavelets is derived. It is shown that the construction of biorthogonal M-channel wavelet bases is equivalent to the design of a M-channel perfect reconstruct... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Fractionally spaced linear and decision-feedback detectors for transmultiplexers

    Publication Year: 1998, Page(s):996 - 1011
    Cited by:  Papers (39)  |  Patents (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (476 KB)

    We investigate improved detectors for transmultiplexer-based high bit rate transmission over dispersive channels like telephone wires. The transmitter is based on a synthesis stage. For the receiver, we design fractionally spaced single-input/multiple-output linear detectors, possibly upgraded with a multiple-input/multiple-output decision-feedback section, for an MMSE criterion. The performance o... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • FIR principal component filter banks

    Publication Year: 1998, Page(s):930 - 940
    Cited by:  Papers (19)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (548 KB)

    Two-dimensional (2-D) principal component filter banks (PCFBs) of finite impulse response (FIR) are proposed. For 2-D signals, among all uniform paraunitary FIR analysis/synthesis filter banks, the FIR PCFBs have the most energy compaction and maximize the arithmetic mean to geometric mean ratio (AM/GM ratio) of subband variances, which is the theoretic coding gain (TCC) of the systems under prope... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • A human identification technique using images of the iris and wavelet transform

    Publication Year: 1998, Page(s):1185 - 1188
    Cited by:  Papers (444)  |  Patents (7)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (96 KB)

    A new approach for recognizing the iris of the human eye is presented. Zero-crossings of the wavelet transform at various resolution levels are calculated over concentric circles on the iris, and the resulting one-dimensional (1-D) signals are compared with model features using different dissimilarity functions View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Least squares approximation of perfect reconstruction filter banks

    Publication Year: 1998, Page(s):968 - 978
    Cited by:  Papers (13)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (484 KB)

    Designing good causal filters for perfect reconstruction (PR) filter banks is a challenging task due to the unusual nature of the design constraints. We present a new least squares (LS) design methodology for approximating PRFBs that avoids most of these difficult constraints. The designer first selects a set of subband analysis filters from an almost unrestricted class of rational filters. Then, ... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.

Aims & Scope

IEEE Transactions on Signal Processing covers novel theory, algorithms, performance analyses and applications of techniques for the processing, understanding, learning, retrieval, mining, and extraction of information from signals

Full Aims & Scope

Meet Our Editors

Editor-in-Chief
Sergios Theodoridis
University of Athens