discrete wavelet packet transform pdf

... lost and the wavelet transform is reversible. This leads to the fast wavelet transform. 1.4 Time–Frequency Resolution In the previous sections we have mentioned that the wavelet transform decomposes ... 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 transform ... 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 Hertz, i.e, quantity...

Ngày tải lên: 19/01/2014, 19:20

... Optical Communication Systems Using Discrete Wavelet Transformation 207 Nader Namazi, Ray Burris, G. Charmaine Gilbreath, Michele Suite and Kenneth Grant ContentsVI Discrete Wavelet Transforms - A Compendium ... orders@intechopen.com Discrete Wavelet Transforms - A Compendium of New Approaches and Recent Applications, Edited by Awad Kh. Al - Asmari p. cm. ISBN 978-953-51-0940-2 DISCRETE WAVELET TRANSFORMS - ... Dimensional Discrete Wavelet Transform for Image Signals 3 Masahiro Iwahashi and Hitoshi Kiya Chapter 2 A Pyramid-Based Watermarking Technique for Digital Images Copyright Protection Using Discrete Wavelet...

Ngày tải lên: 23/03/2014, 03:20

... the 3D wavelet transform, Kutil and Uhl have conducted a study of the software and hardware needs of the 3D wavelet transform [14]. They have centered their study on the classic wavelet transform ... processing tasks, and especially for image and video compression [1, 5]. 2.1. Wavelet analysis and the 3D wavelet transform Wavelet analysis procedures involve the decomposition of a signal into scaled ... efforts have been reported lately for the wavelet transform. Thulasiraman et al. have de- veloped a multithreaded algorithm for computing the 2D wavelet transform [13]. The authors conduct a set...

Ngày tải lên: 22/06/2014, 19:20

Ngày tải lên: 22/07/2014, 02:21

... Input First-Order Response First-Order Response with Lag First-Order Response with Lag plus Dead Time LAPLACE TRANSFORM F ( s ) 1 s A s Ae − t d s A s + a A τ s + 1 A 1 A 2 s + a e − t d s A 1 A 2 τ s + 1 e − t d s TIME FUNCTION f ( t ) u ( t ) A ( t ) A ( t − t d ) Ae − at A τ e − t τ AAe ... 1 t ≥ t 0 A ( t − t d ) = 0 t < t d A ( t − t d ) = At ≥ t d t 0 1 t 0 A t 0 t d A Table 14-2. Laplace transforms. PROCESS RESPONSE A A 2 01 2 t τ =1 τ =2 A 1 A 2 0 t d t d +1 t A 1 A 2 0 t t d t d +1 A 1 A 2 2 ...

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... Wavelet Morlet. a) Biến ñổi Wavelet Haar b) Biến ñổi Wavelet Meyer c) Biến ñổi Wavelet Daubechies d) Biến ñổi Wavelet Morlet 2.3. Phép biến ñổi wavelet packet 10 Phép biến ñổi wavelet ... Fourier Transform: Phân tích tín hiệu dao ñộng bằng phương pháp FFT và phương pháp STFT - Wavelet and Wavelet Packet: Phân tích tín hiệu dao ñộng bằng phép biến ñổi wavelet và wavelet packet. ... trực chuẩn wavelet: -i/2 -i , (t) 2 . (2 t j) i j ψ ψ = − 2.2.2.3. Giới thiệu một số họ wavelet Các dạng của hàm ψ(t) ñược sử dụng: Hàm Wavelet Haar, hàm Wavelet Meyer, hàm Wavelet Daubechies,...

Ngày tải lên: 26/02/2014, 20:20

... to transform: sport in post-apartheid south africa (Transformation 2 – reformative), and those eorts aimed at developing mass participation in swimming (Transformation 1 – transformative). Transformation ... Proponents of Transformation 1 have argued that the state could have played a much more useful role by prioritising redress in its approach to transformation, i.e. understanding transformation ... www.hsrcpress.ac.za 42 the race to transform: sport in post-apartheid south africa The organisational factors impeding transformation are several. The human resource demands for transformation are substantial,...

Ngày tải lên: 06/03/2014, 03:20

... whole paper. 2 Simplified Fractional Fourier Transform (FrFT) The FrFT is a generalizatio n of regular Fourier trans- form in that the Fourier transform transforms a signal from time-domain to frequency-domain, ... fractional Fourier transform and time-frequency representations. IEEE Transactions on Signal Processing 42 (10), 3084–3091 (1992) 21. SC Pei, JJ Ding, Simplified fractional Fourier transform. J Opt ... μ)dt, (2) x(t)=  ∞ −∞ χ α (μ)K −α (t , μ)du. (3) Given that F is the Fourier transform operator and F α r is the fractional Fourier transform operator, then the FrFT possesses the following important...

Ngày tải lên: 20/06/2014, 22:20

... S)γ T n,1 = κ n . The optimal discrete- power adaptation is discretized piecewise channel inversion, closely related to the discrete- power scheme in [17]. Lemma 2. The optimal discrete- power adaptation ... step sizes on the order of 1 dB are proposed [29]. We thus extend the MASA analysis by considering discrete- power adaptation. Specifi- cally, we introduce the MASA NìK scheme where we allow for K ... adaptive power pol- icy and the corresponding spectral efficiencies are presented in Section 4. 3.2. Discrete- power transmission scheme For practical scenarios, the resolution of power control will be...

Ngày tải lên: 22/06/2014, 00:20

... have been accurately found based on Hough transform. r β d α Figure 10: A pattern with four configurations parameters. A 4D parameter space used for Hough transform- based approximation building can ... accurate approximations (e.g., built using Hough transform) may not be recognized as such. An entirely different similarity measure can be proposed if Hough transform is used for building pattern-based approximations. ... windows (both indirect approaches, moment similarities, similarities based on Hough transform, and direct methods, Radon transform and image correlation, are briefly overviewed in Section 3); (3) definition,...

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Ngày tải lên: 22/06/2014, 20:20

... term: transform, is extensively used in Digital Signal Processing, such as: Fourier transform, Laplace transform, Z transform, Hilbert transform, Discrete Cosine transform, etc. Just what is a transform? To ... decomposed. Chapter 8- The Discrete Fourier Transform 145 Type of Transform Example Signal Fourier Transform Fourier Series Discrete Time Fourier Transform Discrete Fourier Transform signals that ... themselves in a periodic fashion. This type of Fourier transform is called the Discrete Time Fourier Transform. Periodic -Discrete These are discrete signals that repeat themselves in a periodic...

Ngày tải lên: 13/09/2012, 09:49