Articles

Multimedia Data Hiding and Authentication via Halftoning and Coordinate Projection

We present image data hiding and authentication schemes based on halftoning and coordinate projection. The proposed data hiding scheme can embed images of the same size and similar bit depth into the cover ima...

Authors: Chai Wah Wu

Applications of Surface Correlation to the Estimation of the Harmonic Fundamental of Speech

We present a method for estimating the fundamental frequency of harmonic signals, and apply this method to human speech. The method is based on cross-spectral methods, which provide accurate resolution of mult...

Authors: Douglas J. Nelson

Median and Morphological Specialized Processors for a Real-Time Image Data Processing

This paper presents the considerations on selecting a multiprocessor MISD architecture for fast implementation of the vision image processing. Using the author′s earlier experience with real-time systems, impl...

Authors: Kazimierz Wiatr

Blind Equalization of a Nonlinear Satellite System Using MCMC Simulation Methods

This paper proposes the use of Markov Chain Monte-Carlo (MCMC) simulation methods for equalizing a satellite communication system. The main difficulties encountered are the nonlinear distorsions caused by the ...

Authors: Stéphane Sénécal and Pierre-Olivier Amblard

Nonlinear Effects of the LMS Adaptive Predictor for Chirped Input Signals

This paper investigates the nonlinear effects of the Least Mean Square (LMS) adaptive predictor. Traditional analysis of the adaptive filter ignores the statistical dependence among successive tap-input vector...

Authors: Jun Han, James R. Zeidler and Walter H. Ku

Construction of Nonseparable Multiwavelets for Nonlinear Image Compression

A procedure for the construction of balanced orthogonal nonseparable quincunx multiwavelets, having filters with good lowpass properties, is introduced. The matrix filter bank is viewed as the polyphase matrix...

Authors: Ana M. C. Ruedin

Watermark Detection and Extraction Using Independent Component Analysis Method

This paper proposes a new image watermarking technique, which adopts Independent Component Analysis (ICA) for watermark detection and extraction process (i.e., dewatermarking). Watermark embedding is performed in...

Authors: Dan Yu, Farook Sattar and Kai-Kuang Ma

Approximation of the Wigner Distribution for Dynamical Systems Governed by Differential Equations

A conceptually new approximation method to study the time-frequency properties of dynamical systems characterized by linear ordinary differential equations is presented. We bypass solving the differential equa...

Authors: Lorenzo Galleani and Leon Cohen

Estimating Position of Mobile Terminals with Survey Data

Estimating the position of mobile terminals is an important problem for cellular networks. This paper describes low cost methods of locating mobile terminals in urban environments. These methods use data colle...

Authors: Michael McGuire, Konstantinos N. Plataniotis and Anastasios N. Venetsanopoulos

Editorial

Authors: Kenneth E. Barner, Gonzalo R. Arce, Giovanni L. Sicuranza and Ilya Shmulevich

Statistically-Efficient Filtering in Impulsive Environments: Weighted Myriad Filters

Linear filtering theory has been largely motivated by the characteristics of Gaussian signals. In the same manner, the proposed Myriad Filtering methods are motivated by the need for a flexible filter class with ...

Authors: Juan G. Gonzalez and Gonzalo R. Arce

M-Estimators of Roughness and Scale for -Modelled SAR Imagery

The GA0 distribution is assumed as the universal model for multilook amplitude SAR imagery data under the multiplicative model. This distribution has two unknown parameters related to the roughness and the sca...

Authors: Oscar H. Bustos, MaríaMagdalena Lucini and Alejandro C. Frery

Instantaneous Spectrum Estimation from Event-Based Densities

We present a method for obtaining a time-varying spectrum that is particularly suited when the data are in event-based form. This form arises in many areas of science and engineering, and especially in astrono...

Authors: Lorenzo Galleani, Leon Cohen, Douglas Nelson and Jeffrey D. Scargle

Multiple Optima in Identification of ARX Models Subject to Missing Data

Special system identification algorithms are required if there are significant amounts of data missing. Some such algorithms have been developed previously and typically result in iterative procedures for the ...

Authors: Ragnar Wallin and Alf J. Isaksson

Variable Selection by Perfect Sampling

Variable selection is very important in many fields, and for its resolution many procedures have been proposed and investigated. Among them are Bayesian methods that use Markov chain Monte Carlo (MCMC) samplin...

Authors: Yufei Huang and Petar M. Djurić

A High Performance Pocket-Size System for Evaluations in Acoustic Signal Processing

Custom-made hardware is attractive for sophisticated signal processing in wearable electroacoustic devices, but has a high initial cost overhead. Thus, signal processing algorithms should be tested thoroughly ...

Authors: Uwe Rass and Gerhard H. Steeger

A Class of High-Rate Low-Complexity Error-Detecting RLL Codes

We present a new methodology for the construction of high-rate channel modulation run-length-limited RLL codes. Simple modulation encode...

Authors: Anthony G. Bessios

Quantization Effects and Stabilization of the Fast-Kalman Algorithm

The exact and actual cause of the failure of the fast-Kalman algorithm due to the generation and propagation of finite-precision or quantization error is presented. It is demonstrated that out of all the formu...

Authors: Constantin Papaodysseus, Constantin Alexiou, George Roussopoulos and Athanasios Panagopoulos

Motion Compensation on DCT Domain

Alternative fully DCT-based video codec architectures have been proposed in the past to address the shortcomings of the conventional hybrid motion compensated DCT video codec structures traditionally chosen as...

Authors: Ut-Va Koc and K. J. Ray Liu

Efficient Implementation of Nested-Loop Multimedia Algorithms

A novel dependence graph representation called the multiple-order dependence graph for nested-loop formulated multimedia signal processing algorithms is proposed. It allows a concise representation of an entire f...

Authors: Surin Kittitornkun and Yu Hen Hu

Onset Detection in Surface Electromyographic Signals: A Systematic Comparison of Methods

Various methods to determine the onset of the electromyographic activity which occurs in response to a stimulus have been discussed in the literature over the last decade. Due to the stochastic characteristic ...

Authors: Gerhard Staude, Claus Flachenecker, Martin Daumer and Werner Wolf

Generalized Method for Sampling Spatially Correlated Heterogeneous Speckled Imagery

This paper presents a general result for the simulation of correlated heterogeneous targets, which are present in images corrupted by speckle noise. This technique is based on the use of a correlation mask and...

Authors: Oscar H. Bustos, Ana G. Flesia and Alejandro C. Frery

LUM Smoother with Smooth Control for Noisy Image Sequences

This paper focuses on adaptive structure of LUM (lower-upper-middle) smoothers for noisy image sequences. For the balance between noise suppression and signal-detail preservation, the LUM smoothers are widely ...

Authors: Rastislav Lukàč and Stanislav Marchevskỳ

Robust Control Methods for On-Line Statistical Learning

The issue of controlling that data processing in an experiment results not affected by the presence of outliers is relevant for statistical control and learning studies. Learning schemes should thus be tested ...

Authors: Enrico Capobianco

The Use of Adaptive Frame for Speech Recognition

We propose an adaptive frame speech analysis scheme through dividing speech signal into stationary and dynamic region. Long frame analysis is used for stationary speech, and short frame analysis for dynamic sp...

Authors: Sam Kwong and Qianhua He

Software Optimization of Video Codecs on Pentium Processor with MMX Technology

A key enabling technology for the proliferation of multimedia PC's is the availability of fast video codecs, which are the basic building blocks of many new multimedia applications. Since most industrial video...

Authors: Pohsiang Hsu and K. J. Ray Liu

A Millennium Start

Authors: K. J. Ray Liu

Analysis and Synthesis of Pseudo-Periodic -Like Noise by Means of Wavelets with Applications to Digital Audio

Voiced musical sounds have nonzero energy in sidebands of the frequency partials. Our work is based on the assumption, often experimentally verified, that the energy distribution of the sidebands is shaped as ...

Authors: Pietro Polotti and Gianpaolo Evangelista

Multi-Channel Sub-Band Speech Recognition

Two distinct fields of research into robust speech recognition are the use of microphone arrays for signal enhancement and the use of independent frequency sub-band models for robust recognition. In this artic...

Authors: Iain A. McCowan and Sridha Sridharan

Generalization of a 3-D Acoustic Resonator Model for the Simulation of Spherical Enclosures

A rectangular enclosure has such an even distribution of resonances that it can be accurately and efficiently modelled using a feedback delay network. Conversely, a nonrectangular shape such as a sphere has a ...

Authors: Davide Rocchesso and Pierre Dutilleux

Denoising Using Blind Source Separation for Pyroelectric Sensors

This paper deals with a process of denoising based on a Blind Source Separation (BSS) method. This technique is inserted in an experimental device of nondestructive testing. Its excitation is a laser beam and ...

Authors: Regis Huez, Danielle Nuzillard and Alain Billat

Radial Basis Function Networks for Conversion of Sound Spectra

In many advanced signal processing tasks, such as pitch shifting, voice conversion or sound synthesis, accurate spectral processing is required. Here, the use of Radial Basis Function Networks (RBFN) is propos...

Authors: Carlo Drioli

Editorial

Authors: Kenneth E. Barner, Gonzalo R. Arce, Giovanni L. Sicuranza and Ilya Shmulevich

Audio Effects Based on Biorthogonal Time-Varying Frequency Warping

We illustrate the mathematical background and musical use of a class of audio effects based on frequency warping. These effects alter the frequency content of a signal via spectral mapping. They can be impleme...

Authors: Gianpaolo Evangelista and Sergio Cavaliere