By Topic

IEEE Transactions on Circuits and Systems II: Analog and Digital Signal Processing

Issue 8 • Date Aug 1995

Filter Results

Displaying Results 1 - 12 of 12
  • Noncausal image modeling using descriptor approach

    Publication Year: 1995, Page(s):536 - 540
    Cited by:  Papers (18)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (396 KB)

    The problems of noncausal image modeling and subsequent image estimation are considered in this brief. The noncausal vector autoregressive (AR) model for the image process is arranged into a descriptor system. This system is then decomposed into backward and forward stable subsystems. The resulting subsystems are utilized to derive a Kalman filter by solving some types of discrete time algebraic L... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • A comparison of design methods for 2-D FIR orthogonal perfect reconstruction filter banks

    Publication Year: 1995, Page(s):525 - 536
    Cited by:  Papers (13)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1172 KB)

    This paper examines the design of nonseparable 2-D FIR perfect reconstruction filter banks. We restrict our attention to orthogonal filter banks, i.e., analysis and synthesis filter banks with paraunitary polyphase matrices. The design problem reduces to the selection of a 2-D FIR paraunitary polyphase matrix, such that the filtering characteristics of the analysis or synthesis filters approximate... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • On the selection of median structure for image filtering

    Publication Year: 1995, Page(s):556 - 558
    Cited by:  Papers (4)  |  Patents (5)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (376 KB)

    Median filtering is a powerful tool for reducing noise in images, particular for long-tailed noise distributions. However, the choice of filter mask is critical. The proper choice depends on the image and noise statistics, which are often unknown. We propose cross-validation as a method for selecting a median filter structure directly from the corrupted image data. This method requires no knowledg... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • On linear integrators and differentiators using instantaneous companding

    Publication Year: 1995, Page(s):561 - 564
    Cited by:  Papers (54)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (300 KB)

    The principle of instantaneous companding, previously proposed for circuits using linear capacitors, is expanded on and extended in four ways: a) necessary conditions for input-output linearity of integrators are derived, b) differentiator circuits are proposed, c) implementations with inductors instead of capacitors are examined, and d) it is shown that, in principle, nonlinear capacitors or indu... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Numerical computation of the cross-covariance sequences of two-dimensional filters and systems

    Publication Year: 1995, Page(s):550 - 552
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (252 KB)

    An effective numerical approach is presented for computing the general two-dimensional (2-D) complex integrals arising in the evaluation of cross-covariance sequences of 2-D digital systems. It converts the problem into the solution of a first-order differential equation with its function evaluations being computations of 1-D complex integrals, which can be efficiently accomplished by applying the... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • A high-frequency track-and-hold stage with offset and gain compensation

    Publication Year: 1995, Page(s):559 - 561
    Cited by:  Papers (9)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (236 KB)

    A novel fully differential track-and-hold stage is proposed. The gain of the stage does not depend on capacitor matching, and it uses a predictive correlated-double-sampling scheme to reduce the effects of op-amp offset and finite dc gain. Due to these properties, it is well suited for the construction of a fully differential sample-and-hold stage using a ping-pong approach. Simulations indicate t... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Design of N-dimensional hyperquadrantally symmetric FIR filters using the McClellan transform

    Publication Year: 1995, Page(s):547 - 550
    Cited by:  Papers (6)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (376 KB)

    A method for designing hyperquadrantally symmetric N-D FIR-filters is presented. Using the first order McClellan transform to map the N-D frequency space onto the 1-D frequency line it is possible to design hyperquadrantally symmetric N-D filters very accurately. The coefficients of the McClellan transform are selected by optimizing a well defined optimization criterion. Although the proposed meth... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Two-dimensional block adaptive filtering algorithms with optimum convergence factors

    Publication Year: 1995, Page(s):505 - 515
    Cited by:  Papers (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (2612 KB)

    In this paper, two new fast gradient algorithms which perform 2-D block adaptive filtering are presented. The 2-D adaptive filter coefficients are updated once for every block of input data and error measurement. The two algorithms employ variable convergence factors which are optimized in the least-squares (LS) sense to track the variations in an image's local statistics. These 2-D optimal algori... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Discrete orthogonal polynomial deconvolution for time-varying systems

    Publication Year: 1995, Page(s):540 - 543
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (340 KB)

    Discrete orthogonal polynomial deconvolution (DOPD) has been demonstrated to be a robust method for obtaining the inverse solution for time-invariant systems. In this communication, extension of the method to time-varying linear systems is explored. The operator-based nature of DOPD lends itself to application to linear time-varying systems expressible as an operator matrix. The stability and nois... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Implementation of programmable multiplierless FIR filters with powers-of-two coefficients

    Publication Year: 1995, Page(s):553 - 556
    Cited by:  Papers (15)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (328 KB)

    An observation which is useful for hardware implementation of programmable FIR filters with powers-of-two coefficients (2PFIR filters) is made. Specifically, it is shown that the exponents of filter coefficients representable by the canonical signed digit (CSD) code with M ternary digits can be chosen from some subsets of {0,1,...,M-1}. This observation naturally leads to 2PFIR filters with shorte... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • RNS-based enhancements for direct digital frequency synthesis

    Publication Year: 1995, Page(s):516 - 524
    Cited by:  Papers (20)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (712 KB)

    Two synthesizer designs are presented which exemplify the advantages of the use of the residue number system in direct digital frequency synthesis. The Frequency Agile Direct Synthesizer (FADS) exhibits a frequency switching latency which is reduced by more than a third below that of traditional, binary number system-based designs. The Reduced Area Direct Synthesizer (RADS) has a chip area which i... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Tracking random walk systems with vector space adaptive filters

    Publication Year: 1995, Page(s):543 - 547
    Cited by:  Papers (6)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (460 KB)

    Tracking properties are considered for adaptive filters that are adjusted within a vector space of filtering operations. Such vector space adaptive filters have both the desirable convergence properties of adaptive finite impulse response filters, and additionally some of the modeling flexibility of adaptive infinite impulse response filters. For a given vector space of systems, the adaptive filte... View full abstract»

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

Aims & Scope

This title ceased production in 2003. The current updated title is IEEE Transactions on Circuits and Systems II: Express Briefs.

Full Aims & Scope