of the discrete wavelet transform
mathematics of the discrete fourier transform
Ngày tải lên :
31/03/2014, 15:21
... through a filter, the carrier wave is delayed by the phase delay
of the filter, while the modulation signal is delayed by the group delay of the filter. In
the case of additive synthesis, group delay ... generator of the mathematical group consisting of the Mth roots
of unity and their products.
We will learn later that the Nth roots of unity are used to generate
all the sinusoids used by the DFT ... Thus, the
sinusoidal motion cos(ωt) is the projection of the circular motion e
jωt
DRAFT of “Mathematics of the Discrete Fourier Transform (DFT),” by J.O.
Smith, CCRMA, Stanford, Winter 2002. The...
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Báo cáo sinh học: " Research Article Eigenvectors of the Discrete Fourier Transform Based on the Bilinear Transform" potx
Ngày tải lên :
21/06/2014, 16:20
... eigenvectors of the DFT matrix inspired by
the ideas behind bilinear transform. The bilinear transform maps the analog space to the discrete sample space. As jω in the
analog s-domain is mapped to the ... aliasing in the discrete z-domain, it is appropriate to use it
in the discretization of the eigenfunctions of the Fourier transform. We obtain Hermite-Gaussian-like eigenvectors of the DFT
matrix. ... orthonormal eigenvectors of the DFT matrix, which is closer to the samples of Hermite-Gaussian functions, is crucial
in the definition of the discrete fractional Fourier transform. In this work,...
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DISCRETE WAVELET TRANSFORMS - A COMPENDIUM OF NEW APPROACHES AND RECENT APPLICATIONS pdf
Ngày tải lên :
23/03/2014, 03:20
... use of the work. Any republication, referencing or personal use of the
work must explicitly identify the original source.
Notice
Statements and opinions expressed in the chapters are these of the ... technique. The technique con‐
sists of two stages: first stage is the pyramid transform and the second stage is the DWT. The
watermark can be a logo image of size n×n pixels. If x
0
(n
1
,n
2
) was the ... values with two of the attacks. These attacks are the median filter and the
JPEG compression. However, for the additive noise and the histogram equalization, it gives
approximately the same average...
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The Discrete Fourier Transform
Ngày tải lên :
13/09/2012, 09:49
... on the shape of the waveform being decomposed.
Chapter 8- The Discrete Fourier Transform 145
Type of Transform Example Signal
Fourier Transform
Fourier Series
Discrete Time Fourier Transform
Discrete ... chunk
of data into another chunk of data. Let's see how this applies to the topic at
hand: the Discrete Fourier transform.
Notation and Format of the Real DFT
As shown in Fig. 8-3, the discrete ... for the synthesis and decomposition. For instance, Fig. 8-1 is
an example of the real DFT. The complex versions of the four Fourier
transforms are immensely more complicated, requiring the use of...
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The discrete fourier transform
Ngày tải lên :
08/06/2014, 20:19
... the “inverse” is named appropriately, since we really do recover x[n] exactly from {X[k]}
N−1
k=0
. The proof of this is
essentially identical to the proof given for the self-consistency of the ... reverse) the other sequence h[n] by drawing it CW around a circle. See illustration on subsequent page.
• s[0] is the sum of the element-by-element product of the two sequences around the circle.
For ... ω
0
=
2π
N
k
0
, then the sinc is sampled only at the peak and the nulls, which gives the Dirac impulse form above.
Otherwise the sinc is sampled at many nonzero values, which gives the messy form...
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báo cáo hóa học:" Research Article Pitch- and Formant-Based Order Adaptation of the Fractional Fourier Transform and Its Application to Speech Recognition" pptx
Ngày tải lên :
21/06/2014, 20:20
... representation of the envelope,
that is, the formant structure, of voiced speech. There-
fore, the aim of the mel-scale subband integration (and,
additionally, the truncation of the sequence of cepstral
Hindawi ... 10) spectrograms of the vowel.
extent, it needs to be investigated whether the better repre-
sentation of the harmonics in the vicinity of the formants
outweighs the smearing of the formants.
4.3. ... derivative of the instantaneous frequency
oftheFrFTbasisfunction.Thereisstillnoeffective way to
calculate the order optimally, that is, in a way that the chirp
rates of the basis functions and of the...
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Tài liệu Multimedia Applications Of The Wavelet Transform ppt
Ngày tải lên :
25/12/2013, 05:17
... in the expectation that
a well–suited transformation will facilitate the reading, i.e., the analysis of the relevant information.
Of course, the choice of the transform depends on the nature of ... synthesis with wavelets and even the definition of wavelet bases. Finally, it allows a
review of the fast wavelet transform of Section 1.5 and a recovery of the missing detail information of
Example ... Properties of the Short–time Fourier Transform . . . 15
1.4.3 Properties of the Wavelet Transform . . . 16
VI
A
FEW WORDS
of the presented work. They all contributed to my dissertation with their...
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Tài liệu Multimedia Applications of the Wavelet Transform pdf
Ngày tải lên :
19/01/2014, 19:20
... fundamentals of the wavelet theory: We discuss the time–frequency resolution
of the wavelet transform and compare it to the common short–time Fourier transform. The multiscale
property of the dyadic wavelet ... [Sch01d].
A historic overview of the development of the wavelet theory precedes the introduction of the (one–
dimensional) continuous wavelet transform. Here, the definition of a wavelet and basic properties
are ... function to
Transforms
Fourier transform of :
Wavelet transform of with respect to :
Approximation of at the scale
Detail of at the scale
Misc
DCT Discrete cosine transform
WT Wavelet transform
Hz...
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The transformation of the American class structure, 1960-1990
Ngày tải lên :
01/11/2013, 07:20
... to the expansion of the expert-manager
category. These trends of intensi®ed proletarianization in the labor
process generate the prediction of an expansion of the working class, an
expansion of ... faced with the problem
of extracting labor effort from workers. In the arsenal of strategies of
social control available to the capitalist class, one of the key weapons is
the degradation of work, ... uniquely
attributed either to changes within sectors or to changes in the sectoral
composition of the labor force. Rather, they result from the interaction of
these two forces. This contribution to the overall...
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Tài liệu Banks’ exposure to interest rate risk, their earnings from term transformation, and the dynamics of the term structure pptx
Ngày tải lên :
16/02/2014, 06:20
... is the cross-sectional average of the bank-specific variable α
i
of those banks for
which there is an observation in month t. As the composition of this sample changes in the
course of time, the ... (column 3) and
the model with only the regulation variables (column 4). The R
2
of the full model is
17.24%, i.e. the combined contribution of the systematic factor and the regulation to the
total ... constant
and the own funds decrease or increase.
With the help of the two other specifications, it is possible to disentangle the contri-
butions of the systematic factor and of the regulation....
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