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IEEE Signal Processing Letters

Issue 6 • Date June 1998

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Displaying Results 1 - 8 of 8
  • Efficient block implementation of the decision feedback equalizer

    Publication Year: 1998, Page(s):129 - 131
    Cited by:  Papers (7)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (130 KB)

    A new block adaptive decision feedback equalizer is developed. Both the feedforward (FF) and the feedback (FB) filters are updated once every K sample time intervals, with K being the block length. It should be noted that this block adaptation is done in such a way that the resulting filters, and the decisions as well, are identical to those computed by the conventional sample by sample LMS-based ... View full abstract»

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  • A Kaiser window approach for the design of prototype filters of cosine modulated filterbanks

    Publication Year: 1998, Page(s):132 - 134
    Cited by:  Papers (105)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (85 KB)

    The traditional designs for the prototype filters of cosine modulated filterbanks usually involve nonlinear optimizations. We propose limiting the search of the prototype filters to the class of filters obtained using Kaiser windows. The design process is reduced to the optimization of a single parameter. An example is given to show that very good designs can be obtained in spite of the limit of s... View full abstract»

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  • An embedded DCT-based still image coding algorithm

    Publication Year: 1998, Page(s):135 - 137
    Cited by:  Papers (9)  |  Patents (6)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (94 KB)

    An embedded discrete cosine transform-based (DCT-based) image coding algorithm is described. The algorithm outperforms other DCT-based coders published in the literature, including the Joint Photographers Expert Group (JPEG) algorithm. View full abstract»

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  • A multiresolution distance measure for images

    Publication Year: 1998, Page(s):138 - 140
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (147 KB)

    We present a new distance measure that can be used for comparing digital images. The proposed grey block distance (GBD) is compared with the Hutchinson metric to show its usefulness as a measure of the visual similarity of images. View full abstract»

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  • Generalized Karhunen-Loeve transform

    Publication Year: 1998, Page(s):141 - 142
    Cited by:  Papers (43)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (72 KB)

    We present a novel generic tool for data compression and filtering: the generalized Karhunen-Loeve (GKL) transform. The GKL transform minimizes a distance between any given reference and a transformation of some given data where the transform has a predetermined maximum possible rank. The GKL transform is also a generalization of the relative Karhunen-Loeve (RKL) transform by Yamashita and Ogawa (... View full abstract»

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  • Phone-dependent channel compensated hidden Markov model for telephone speech recognition

    Publication Year: 1998, Page(s):143 - 145
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (46 KB)

    We propose the phone-dependent channel compensated hidden Markov model (PDCC-HMM) for telephone speech recognition. The PDCC-HMM is derived by modifying the conventional hidden Markov model (HMM) with the phone-dependent channel compensation vectors. The telephone speech is recognized efficiently by using the derived PDCC-HMM. Experiments demonstrate the robustness of PDCC-HMM in speech recognitio... View full abstract»

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  • IMM-based estimation for slowly evolving environments

    Publication Year: 1998, Page(s):146 - 149
    Cited by:  Papers (23)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (126 KB)

    We propose a new approach to environmental parameter estimation for robust speech recognition in adverse conditions. The proposed method is based on the interacting multiple model (IMM) technique widely used in the area of multiple target tracking. Through a number of continuous digit recognition experiments, we can find the effectiveness of the IMM-based approach in slowly evolving environment co... View full abstract»

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  • Stability of multivariable least-squares models: a solution via spectral analysis

    Publication Year: 1998, Page(s):150 - 152
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (124 KB)

    Time-domain least-squares equation-error models are widely used for estimation of an input-output (I/O) parametric transfer function. It is known that an autoregressive constraint on the input is sufficient to ensure stability of the estimated multivariable model. In this letter, we consider a frequency-domain solution to the least-squares equation-error multivariable system identification problem... View full abstract»

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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