2002 14th International Conference on Digital Signal Processing Proceedings. DSP 2002 (Cat. No.02TH8628)
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Các bài báo tiêu biểu
Improving the speed and performance of adaptive equalizers via transform based adaptive filtering
Tập 2 - Trang 1301-1304 vol.2
Adaptive equalizers are widely used in many communication systems where the
channel frequency response characteristics are either time varying or unknown
such as the case in wireless and dial up telecommunication networks where the
communication channel constantly change due to the different packet routes and
switching that takes place, as well as due to the changes in the RF propagation.
This wor...
#Adaptive equalizers #Adaptive filters #Discrete Fourier transforms #Discrete wavelet transforms #Fourier transforms #Discrete cosine transforms #Eigenvalues and eigenfunctions #Frequency response #Time varying systems #Communication channels
Recursive non parametric spectral estimation from irregularly sampled observations
Tập 2 - Trang 799-802 vol.2
In this paper, the nonparametric spectral analysis of a randomly sampled signal
is discussed. In particular, a class of estimators is introduced: the IRINCORREL
class. This class is composed of recursive algorithms which both take into
account the sampling irregularity and the correlation of the signal values. The
study of the mean square estimation error shows that there is a trade off
between bi...
#Recursive estimation #Sampling methods #Spectral analysis #Signal processing algorithms #Frequency #Random variables #Large Hadron Collider #Estimation error #Convergence #Signal processing
Spectrum estimation of nonuniformly sampled signals
Tập 2 - Trang 795-798 vol.2
Nonuniform sampling of signals, if properly used, may allow performing digital
signal processing that does not suffer from the undesired effects of aliasing.
This paper presents the results of research on estimating spectra of signals
whose samples were taken at randomly distributed sampling instants. The paper
determines the conditions under which a DFT-like spectrum estimator provides an
unbiase...
#Spectral analysis #Signal sampling #Digital signal processing #Sampling methods #Frequency estimation #Signal processing algorithms #Nonuniform sampling #Signal processing #Signal analysis #Hardware
Incorporating prior knowledge in ICA
Tập 2 - Trang 761-764 vol.2
We propose the modification of the cost function that is optimised by the
independent component analysis (ICA) algorithm, so that prior knowledge about
some statistical properties of one of the components is incorporated in the
optimisation process, for this component to be identified first. Once this
component is removed from the recordings, the remaining components may be
identified in the usual...
#Independent component analysis #Mathematics #Cost function #Signal processing #Magnetic separation #Interference #Eyes #Heart #Statistics #Signal reconstruction
Flexible real time signal filtering in space using reconfigurable logic
Tập 2 - Trang 849-852 vol.2
The High Performance Computing (HPC-I) payload is an innovative computing device
designed for deployment on the Australian scientific mission satellite FedSat.
HPC-I will validate and evaluate the practicality of using reconfigurable field
programmable gate array (FPGA) technology in the space environment. The
deployment of reconfigurable FPGA technology on-board satellites is a very
promising sol...
#Filtering #Reconfigurable logic #Space technology #Finite impulse response filter #Field programmable gate arrays #High performance computing #Satellites #Payloads #Australia #Programmable logic arrays
Single ideal-scale edge detection using noise within images
Tập 2 - Trang 935-938 vol.2
Researchers spend time and money developing techniques to solve some common
problems associated with the rapidly developing field of image processing. These
problems include poor edge detection in low contrast images, speed of
recognition and high computational cost. Scale space analysis is an efficient
solution to the edge detection of objects. However, this approach is time
consuming and computa...
#Image edge detection #Laplace equations #Pixel #Image recognition #Computational efficiency #Image processing #Object detection #Neural networks #Noise level #Convolution
Real-time tracking for managing suburban intersections
Tập 2 - Trang 1023-1026 vol.2
The goal of this project is to develop a passive vision-based sensing system
capable of monitoring an intersection by observing the vehicle and pedestrian
flow, and predicting situations that might give rise to accidents. A single
camera mounted at an arbitrary position looking at an intersection is used.
However, for extended applications multiple cameras will be needed. Some of the
key elements ...
#Cameras #Tracking #Motion segmentation #Computer vision #Vector quantization #Vehicle detection #Monitoring #Accidents #Calibration #Gaussian processes
A fast object detection algorithm using motion-based region-of-interest determination
Tập 2 - Trang 1105-1108 vol.2
In this paper, we present a new fast algorithm for achieving motion-based object
detection in an image sequence. While in most existing object-detection
algorithms, segmentation of the image is done as the first step followed by
grouping of segments, the proposed algorithm uses the motion information to
first identify what we call region of interest. Segmentation is done only within
a square of in...
#Object detection #Image segmentation #Surface topography #Image sequences #Motion estimation #Motion detection #Pixel #Shape #Tracking #Video coding
A new method for complete-to-overcomplete discrete wavelet transforms
Tập 2 - Trang 501-504 vol.2
Overcomplete discrete wavelet transforms (ODWT) are used in a number of
applications because they provide shift invariance, a property extremely useful
in wavelet-based image processing and video coding. In this paper, we propose a
new construction of the ODWT starting from the subbands of the critically
sampled (complete) DWT. The most straightforward application of our theory is
scalable video c...
#Discrete wavelet transforms #Video coding #Filters #Image processing #Motion estimation #Image reconstruction #Parallel processing #Filtering #Production #Concurrent computing
Optimization of modular reduction procedure in RSA algorithm implementation on assembler of TMS320C54x signal processors
Tập 2 - Trang 811-814 vol.2
Possible optimization techniques for the modular reduction procedure of RSA
algorithm realization on assembler of Texas Instruments TMS320C54x family of
signal processors are considered. Besides a standard dividing algorithm with a
remainder, a reciprocal value method and Montgomery's procedure are considered.
Obtained results show that the best results are obtained by using Montgomery's
approach ...
#Assembly #Signal processing algorithms #Signal processing #Digital signatures #Coprocessors #Computer networks #Computer architecture #Public key cryptography #Public key #Mathematics