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IEEE Signal Processing Letters

Issue 11 • Date Nov. 1994

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Displaying Results 1 - 8 of 8
  • Current objectives in 4-kb/s wireline-quality speech coding standardization

    Publication Year: 1994, Page(s):157 - 159
    Cited by:  Papers (5)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (260 KB)

    The standardization of high-quality speech coding has intensified. In parallel, a number of novel applications are placing new demands on transmission efficiency and quality. In response to such challenges, standardization bodies have begun the definition of requirements for the next generation of very low-rate speech coding. Taking a lead in these activities, ANSI committee T1A1 and the ITU-T ini... View full abstract»

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  • Energy onset times for speaker identification

    Publication Year: 1994, Page(s):160 - 162
    Cited by:  Papers (7)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (326 KB)

    Onset times of resonant energy pulses are measured with the high-resolution Teager operator and used as features in the Reynolds Gaussian-mixture speaker identification algorithm. Feature sets are constructed with primary pitch and secondary pulse locations derived from low and high speech formants. Preliminary testing was performed with a confusable 40-speaker subset from the NTIMIT (telephone ch... View full abstract»

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  • Adaptive filtering for non-Gaussian stable processes

    Publication Year: 1994, Page(s):163 - 165
    Cited by:  Papers (32)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (305 KB)

    A large class of physical phenomena observed in practice exhibit non-Gaussian behavior. In the letter /spl alpha/-stable distributions, which have heavier tails than Gaussian distributions, are considered to model non-Gaussian signals. Adaptive signal processing in the presence of such a noise is a requirement of many practical problems. Since direct application of commonly used adaptation techniq... View full abstract»

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  • A new efficient implementation of the oddly stacked Princen-Bradley filter bank

    Publication Year: 1994, Page(s):166 - 168
    Cited by:  Papers (17)  |  Patents (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (207 KB)

    An improved implementation of the oddly stacked Princen-Bradley filter bank is proposed. The new implementation is based on the same approach as suggested by Duhamel et al. [1991], where the complex fast Fourier transform algorithm of length equal to half of the number of subbands is used in order to obtain a significant reduction of number of arithmetic operations. In the implementation, the anal... View full abstract»

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  • Frequency domain Volterra filters in terms of distributions

    Publication Year: 1994, Page(s):169 - 172
    Cited by:  Papers (1)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (357 KB)

    The Fourier transform of the output of a Volterra filter is given in terms of Schwartz distributions. This theory is developed in order to handle input signals that do not possess a Fourier transform in the usual sense. To illustrate this, the authors apply the result to the case of a sinusoidal input and to the case of a sampled and periodized signal.<> View full abstract»

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  • On image and template false alarm rates when using target templates for target detection

    Publication Year: 1994, Page(s):173 - 175
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (220 KB)

    The letter studies how the image false alarm rates are related to the target template false alarm rates when target templates are used for target detection. The authors show with both the analytical and simulated examples that when the image size is much larger than the target template size and the image false alarm rate is small, the image false alarm rate is approximately equal to the target tem... View full abstract»

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  • New results on multidimensional Chinese remainder theorem

    Publication Year: 1994, Page(s):176 - 178
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (263 KB)

    The Chinese remainder theorem (CRT) [McClellan and Rader 1979] has been well known for applications in fast DFT computations and computer arithmetic. Guessoum and Mersereau [1986] first made headway in extending the CRT to multidimensional (MD) nonseparable systems and showing its usefulness. The present letter generalize the result and present a more general form. This more general MDCRT is an ex... View full abstract»

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  • Dynamic range compression by edge-preserving filtering

    Publication Year: 1994, Page(s):179 - 181
    Cited by:  Papers (1)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (204 KB)

    Dynamic range compression is useful for displaying and enhancing images. It is common to subtract a mask from a given image to enhance the details. The trick is how to obtain a good mask. The authors describe how an edge-preserving filter can be used to generate a mask that is smooth over areas with fine details, yet preserves most of the edges. Experiments with real images show that the scheme is... View full abstract»

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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.

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Meet Our Editors

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