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An efficient technique for loading search area in block-based motion estimation is proposed. The main advantage of the proposed technique is to reduce number of search area loading cycles by taking advantage of the vertical and horizontal overlap between adjacent search areas and thus improve the overall performance of the motion search and frame encoding. The proposed technique was implemented in...
The increasing demand for portable computing has elevated power consumption to be one of the most critical embedded systems design parameters. In this paper, we present a qualitative study wherein we examine the impact of code transformations on the energy and power consumption. Three main categories of code transformations are investigated, namely data, loop and procedural oriented transformations...
In this paper we present a novel data encoding scheme to reduce the power dissipation and the energy consumption of the communication system in a network-on-chip (NoC) based system-on-chip (SoC). As technology shrinks an ever more significant fraction of the overall system power/energy budget is due to the on-chip interconnect. It is therefore essential the definition of new methodologies and techniques...
Quality enhancement of fingerprint images is important for a good performance of Automatic Fingerprint Identification System (AFIS). In this paper, a hybrid fingerprint enhancement algorithm is presented. This algorithm is based on morphological enhancement in the additive wavelet transform domain and Wave Atom denoising. The performance of the proposed algorithm has been evaluated on a set of images...
This paper presents a new approach for image encryption based on the chaotic Baker map, but in the different transform domains. The discrete cosine transform (DCT), the discrete sine transform (DST), the discrete wavelet transform (DWT) and the additive wavelet transform (AWT) are exploited in the proposed encryption approach. Chaotic encryption is performed in these transform domains to make use...
This paper proposes a new time domain equalizer (TEQ) filter bank for discrete multi-tone (DMT) systems. This filter bank can be used along with the DMT systems based on the discrete Fourier transform, which will be called (DFT-DMT) systems. The paper presents also an alternative implementation for DMT systems with the discrete cosine transform, called the DCT-DMT implementation, and an investigation...
This paper presents a new technique, based on trigonometric transforms, to solve the peak to average power ratio (PAPR) problem associated with orthogonal frequency division multiplexing (OFDM) signals. In the proposed technique, both the in-phase and in-quadrature components of the OFDM signals after the inverse fast Fourier transform (IFFT) are transformed using either the discrete sine transform...
The method of utilizing available prior information in the popular FCM algorithm and assesses its benefits in estimating the intensity inhomogeneities and segmenting human brain MRI volumes is studied in this paper. The intensity inhomogeneities in medical images are associated with the acquisition sequences and imperfections in the radio-frequency coils in MRI scanners. Presence of intensity inhomogeneities...
With the tremendous growth of the Web and the contents difference, users need specialized accurate results depending on their behavior and varying according to their interest. In this paper, we introduce A personal search engine which provides results relevant to the user's interest. Our search engine depends on three factors to ensure relevant and accurate results. The first factor is the degree...
Many of the object-oriented (OO) metrics that have been proposed over the last decade can be applied to measure internal quality attributes of class diagrams. This paper describes a tool that automates the computation of the important metrics that are applicable to the UML class diagrams. The tool collects information by parsing the XMI format of the class diagram to produce a meta-data for the class...
This paper presents and discusses the theoretical and experimental results of the associated effects of temperature rise on the performance of the induction motor. These effects are theoretically studied, in which a model for the induction motor is developed by using MATLAB program. The model adopted is involving the electrical, mechanical, and thermal effects of the induction motor. Simulation results...
In this paper, a new single carrier frequency division multiple access (SC-FDMA) system based on the discrete cosine transform (DCT) for uplink wireless transmissions, is introduced. The time domain expressions of the DCT SC-FDMA signals are derived. The peak to average power ratio (PAPR) of the DCT SC-FDMA signals is compared with that of the discrete Fourier transform (DFT) SC-FDMA and orthogonal...
In this paper, a new distributed space-frequency coding (DSFC) scheme, for broadband fading relay channels is presented. This scheme exhibits a spatial and a multipath diversity in a distributed fashion. An upper-bound on the pairwise error probability (PEP) is derived. From this PEP bound, it is shown that the proposed coding scheme achieves a diversity of order NL , where N is the number of relay...
This paper proposes the application of the discrete cosine transform (DCT) and/or the discrete sine transform (DST) in discrete multi-tone (DMT) systems in order to achieve higher bit rates. These transforms are used instead of the discrete Fourier transform (DFT). The performance of the DCT-DMT system with a minimum mean-squared error time domain equalizer (MMSE-TEQ) designed using the unit-tap constraint...
The instruction set architecture (ISA) is the part of the processor that is visible to the programmer or compiler writer. Multi-level ISA is proposed to explicitly communicate data parallelism to hardware (processor) in a compact way instead of the dynamic extraction using complex hardware or the static extraction using sophisticated compiler techniques. This paper presents the codevelopment of multi-level...
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