An Efficient Architecture for Lifting-Based Forward and Inverse Discrete Wavelet Transform

Aroutchelvame, S.M.; Raahemifar, K.

doi:10.1109/icme.2005.1521548

Cited by 9 publications

(4 citation statements)

References 5 publications

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“…The predict module and update module can be seen in more details in Figs. 4 and 5 as is presented in [25]. As mentioned in previous sections the bi-orthogonal wavelet (5, 3) filter is used.…”

Section: Hardware Architecturementioning

confidence: 99%

Design and implementation of a reliable and authenticated satellite image communication

Abolfathi

Amirfattahi

2010

Telecommun Syst

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According to the need for having a confident and secure communication of satellite images with minimum tolerable delay, a novel method is presented here as a design and implementation of modern techniques. This paper turns around novel algorithms, building systems with higher performance using multi-resolution decomposition. Computation and implementation of watermarking and compression are the main issues of this research. We used Discrete Wavelet Transform (DWT) as a basic tool along by compression and watermarking of satellite images. This is due to the fact that DWT supports features like progressive image transmission. Lifting-based scheme which often requires less computation resources has been used for constructing bi-orthogonal wavelet calculation cores. We used ModelSim to build the simulation results of the implemented structures described in VHDL.

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Section: Hardware Architecturementioning

confidence: 99%

Design and implementation of a reliable and authenticated satellite image communication

Abolfathi

Amirfattahi

2010

Telecommun Syst

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“…The WPT decomposition based on lifting scheme for (5,3) and (9,7) biorthogonal wavelets is proposed and discussed in detail by the authors in [7]. The input samples read from the dual-port input RAM are fed to both WPT and cost function architectures and thus, both the computations are carried out simultaneously.…”

Section: Wpt Architecture (First Stage)mentioning

confidence: 99%

An Efficient Architecture for Entropy-Based Best-Basis Algorithm

Aroutchelvame¹,

Raahemifar²

2006

2006 International Conference on Image Processing

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In this work, we propose an architecture for the waveletpacket based best-basis algorithm for images using Shannon Entropy as cost function. The algorithm for the logarithm implementation for integers using Taylor series is also proposed to implement Shannon entropy. The proposed architecture includes the architectures for the best-tree selection. The execution time of the proposed hardware for the best-basis algorithm for images is compared to its software implementation. The proposed best-basis architecture has been described in VHDL at the RTL level, simulated successfully for its functional correctness and implemented in an FPGA.

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“…The WPT decomposition based on lifting scheme for (5,3) and (9,7) biorthogonal wavelet is proposed and discussed in detail by the authors in [8][9]. The odd and even samples of the input signal are read from dual-port input RAM and the coarse and detailed coefficients are written into the input RAM in every clock cycle.…”

Section: Wpt Architecture (First Stage)mentioning

confidence: 99%

An Architecture Design of Threshold-Based Best-Basis Algorithm

Aroutchelvame¹,

Raahemifar²

2006

2006 IEEE International Conference on Multimedia and Expo

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The best-basis algorithm has gained much importance on textured-based image compression and denoising of signals. In this paper, an architecture for the wavelet-packet based best-basis algorithm for images is proposed. The paper also describes the architecture for best-tree selection from 2D wavelet packet decomposition. The precision analysis of the proposed architecture is also discussed and the result shows that increase in the precision of input pixel greatly increases the Signal-to-Noise Ratio (SNR) per pixel whereas increase in the precision of filter coefficient does not greatly help in improving the SNR value. The proposed architecture is described in VHDL at the RTL level, simulated successfully for its functional correctness and implemented in an FPGA.

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An Efficient Architecture for Lifting-Based Forward and Inverse Discrete Wavelet Transform

Cited by 9 publications

References 5 publications

Design and implementation of a reliable and authenticated satellite image communication

Design and implementation of a reliable and authenticated satellite image communication

An Efficient Architecture for Entropy-Based Best-Basis Algorithm

An Architecture Design of Threshold-Based Best-Basis Algorithm

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