In this paper we describe the architecture{speci c automatic performance tuning implemented in the UHFFT library. The UHFFT library is an adaptive and portable software library for fast Fourier transforms (FFT).

We calculate the local Fourier transformations for a class of Ql-sheaves. In particular, we verify a conjecture of Laumon and Malgrange ([15] 2.6.3). As an application, we calculate the local monodromy of l-adic hypergeometric sheaves introduced by Katz ([12]). We also discuss the characteristic p analogue of the Turrittin-Levelt Theorem for D-modules. The method used in this paper can be used ...

Figure 1. The spectrum of an input voltage is calculated using an FFT application. (See article inside, page 9.) Figure 2. A butterfly computation is used to perform an FFT for N = 8. (See article inside, page 10.)

The skin impedance is well various and changeable rapidly, so it is not easy to measure precisely the all frequency characteristics(l). In order to measure the all frequency characteristics, there are two methods as follows. One is multi-frequency points measuring method and the other is the fast fourier transformation (FFT) method from the response in time domain. However, the former demands v...

Lip synchronization is the determination of the motion of the mouth and tongue during speech. It can be deduced from the speech signal without phonemic analysis, and irrespective of the content of the speech. Our method is based on the observation that the position of the mouth over a short interval of time can be correlated with the basic shape of the spectrum of the speech over that same inte...

This paper presents an effort to provide a more efficient speech signal representation, which aims to be incorporated into an automatic speech recognition system. Modified cepstral coefficients, derived from a multiresolution auditory spectrum are proposed. The multiresolution spectrum was obtained using sliding single point discrete Fourier transformations. It is shown that the obtained spectr...

In this paper, the first part of a larger work, we prove the spectral decomposition of ∫ ∞ −∞ |ζ(σ + it)|g(t) dt ( 12 < σ < 1 fixed), where g(t) is a suitable weight function of fast decay. This is used to obtain estimates and omega results for the function