Articles

Segmentation and Content-Based Watermarking for Color Image and Image Region Indexing and Retrieval

In this paper, an entirely novel approach to image indexing is presented using content-based watermarking. The proposed system uses color image segmentation and watermarking in order to facilitate content-base...

Authors: Nikolaos V. Boulgouris, Ioannis Kompatsiaris, Vasileios Mezaris, Dimitrios Simitopoulos and Michael G. Strintzis

Stand-Alone Objective Segmentation Quality Evaluation

The identification of objects in video sequences, that is, video segmentation, plays a major role in emerging interactive multimedia services, such as those enabled by the ISO MPEG- ...

Authors: Paulo Lobato Correia and Fernando Pereira

Equalization and Decoding for Multiple-Input Multiple-Output Wireless Channels

We consider multiple-input, multiple-output (MIMO) wireless communication systems that employ multiple transmit and receive antennas to increase the data rate and achieve diversity in fading multipath channels...

Authors: Bjørn A. Bjerke and John G. Proakis

A Novel Decoder for Unknown Diversity Channels Employing Space-Time Codes

We suggest new decoding techniques for diversity channels employing space time codes (STC) when the channel coefficients are unknown to both transmitter and receiver. Most of the existing decoders for unknown ...

Authors: Elona Erez and Meir Feder

Systematic Design of Space-Time Trellis Codes for Diversity and Coding Advantages

The emerging need for high data rate wireless services has raised considerable interest in space-time coding. In this work, we propose a systematic code construction method that jointly considers diversity adv...

Authors: Zoltan Safar and K. J. Ray Liu

Editorial

Authors: Dirk Slock, Vahid Tarokh and Xiang-Gen Xia

Differential Space-Time Block Code Modulation for DS-CDMA Systems

A differential space-time block code (DSTBC) modulation scheme is used to improve the performance of DS-CDMA systems in fast time-dispersive fading channels. The resulting scheme is referred to as the differentia...

Authors: Jianhua Liu, Jian Li and Erik G. Larsson

Multiple-Symbol Decision-Feedback Space-Time Differential Decoding in Fading Channels

Space-time differential coding (STDC) is an effective technique for exploiting transmitter diversity while it does not require the channel state information at the receiver. However, like conventional differen...

Authors: Yan Liu and Xiaodong Wang

Low Complexity Receiver Structures for Space-Time Coded Multiple-Access Systems

Multiuser detection for space-time coded synchronous multiple-access systems in the presence of independent Rayleigh fading is considered. Under the assumption of quasi-static fading, it is shown that optimal ...

Authors: Sudharman K. Jayaweera and H. Vincent Poor

Channel Estimation and Optimal Power Allocation for a Multiple-Antenna OFDM System

We propose combining channel estimation and optimal power allocation approaches for a multiple-antenna orthogonal frequency division multiplexing (OFDM) system in high-speed transmission applications. We devel...

Authors: Tai-Lai Tung and Kung Yao

Space-Time Codes for Wireless Optical Communications

A space-time channel coding technique is presented for overcoming turbulence-induced fading in an atmospheric optical heterodyne communication system that uses multiple transmit and receive apertures. In parti...

Authors: Shane M. Haas, Jeffrey H. Shapiro and Vahid Tarokh

Rayleigh Fading Multi-Antenna Channels

Information theoretic properties of flat fading channels with multiple antennas are investigated. Perfect channel knowledge at the receiver is assumed. Expressions for maximum information rates and outage prob...

Authors: Alex Grant

Space-Time Turbo Coded Modulation: Design and Applications

A design method for recursive space-time trellis codes and parallel-concatenated space-time turbo coded modulation is proposed that can be applied to an arbitrary existing space-time trellis code. The method e...

Authors: Djordje Tujkovic, Markku Juntti and Matti Latva-aho

Joint Estimation and Decoding of Space-Time Trellis Codes

We explore the possibility of using an emerging tool in statistical signal processing, sequential importance sampling (SIS), for joint estimation and decoding of space-time trellis codes (STTC). First, we prov...

Authors: Jianqiu Zhang and Petar M. Djurić

Lossless Data Embedding—New Paradigm in Digital Watermarking

One common drawback of virtually all current data embedding methods is the fact that the original image is inevitably distorted due to data embedding itself. This distortion typically cannot be removed complet...

Authors: Jessica Fridrich, Miroslav Goljan and Rui Du

A Note on Watermark Development from the Commercial Context

The question is raised as to whether or not the currently developed theories of watermarking provide an adequate model for the handling of digital data in the commercial world.

Authors: David Hilton

Video Error Correction Using Steganography

The transmission of any data is always subject to corruption due to errors, but video transmission, because of its real time nature must deal with these errors without retransmission of the corrupted data. The...

Authors: David L. Robie and Russell M. Mersereau

The First 50 Years of Electronic Watermarking

Electronic watermarking can be traced back as far as 1954. The last 10 years has seen considerable interest in digital watermarking, due, in large part, to concerns about illegal piracy of copyrighted content....

Authors: Ingemar J. Cox and Matt L. Miller

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

Editorial

Authors: Mauro Barni, Franco Bartolini and Jessica Fridrich

Compressive Data Hiding: An Unconventional Approach for Improved Color Image Coding

Traditionally, data hiding and compression have had contradictory goals. The former problem adds perceptually irrelevant information in order to embed data, while the latter removes this irrelevancy and redund...

Authors: Patrizio Campisi, Deepa Kundur, Dimitrios Hatzinakos and Alessandro Neri

Practical Challenges for Digital Watermarking Applications

The field of digital watermarking has recently seen numerous articles covering novel techniques, theoretical studies, attacks, and analysis. In this paper, we focus on an emerging application to highlight prac...

Authors: Ravi K. Sharma and Steve Decker

Digital Watermarks Enabling E-Commerce Strategies: Conditional and User Specific Access to Services and Resources

Digital watermarking is well known as enabling technology to prove ownership on copyrighted material, detect originators of illegally made copies, monitor the usage of the copyrighted multimedia data and analy...

Authors: Jana Dittmann, Martin Steinebach, Petra Wohlmacher and Ralf Ackermann

Robust Watermarking of Cartographic Images

We present a method (Text-Based Geometric Normalization—TBGN) which, by exploiting the particular content of cartographic images, namely text content, permits to cope with global geometric transformations. Fir...

Authors: Mauro Barni, Franco Bartolini, Alessandro Piva and Filippo Salucco

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