STATISTICAL INFERENCE OF MISSING SPEECH DATA IN THE ICA DOMAIN (2008)
Justinian Rosca, Timo Gerkmann, Doru-cristian Balcan
We address the problem of speech estimation as statistical estimation with “missing ” data in the independent component analysis (ICA) domain. Missing components are substituted by values drawn...
Mutual Interdependence Analysis (MIA) (2008)
Heiko Claussen, Justinian Rosca
Abstract. Functional Data Analysis (FDA) is used for datasets that are more meaningfully represented in the functional form. Functional principal component analysis, for instance, is used to extract...
Independent Component Analysis for Speech Enhancement with Missing TF Content (2008)
Doru-cristian Balcan, Justinian Rosca
Abstract. We address the problem of Speech Enhancement in a setting where parts of the time-frequency content of the speech signal are missing. In telephony, speech is band-limited and the goal is to...
Towards a New Generation of Program Synthesis Approaches (2007)
Justinian Rosca, Justinian P. Rosca
s the effects of program execution. Third a termination criterion tests if a satisfactory solution is found. Several parameters have to be additionally specified. Population size is the most...
Genetic Programming Acquires Solutions by Combining Top-Down and Bottom-Up Refinement (2007)
ould be stable components. [11] presented experimental evidence that they are indeed refined or acquired bottom-up. It considered representations for the parity problem with three components: two...
Size-Fitness Interplay in Genetic Search (2007)
this paper will hopefully help in this endeavor (see [5] and [4] for full details). This theory highlights the interplay between the size of evolved structures and their fitness. Based on this...
REAL-TIME AUDIO SOURCE SEPARATION BY DELAY AND ATTENUATION COMPENSATION IN THE TIME DOMAIN (2007)
Justinian Rosca, Ningping Fan, Radu Balan
There is increased interest in using microphone arrays in a variety of audio source separation and consequently speech processing applications. In particular, small arrays of two to four microphones...
Evolutionary Speciation for Problem Decomposition (2007)
Justinian Rosca, Michael Patrick, Pattie Maes
Modular problem decomposition is often employed to cope with complex real-world problems. An intelligent decomposition can efficiently lead to compact and general solutions but is, in most cases, the...
Enhanced VQ-based algorithms for speech independent speaker identification (2003)
Abstract. Weighted distance measure and discriminative training are two different approaches to enhance VQ-based solutions for speaker identification. To account for varying importance of the LPC...
Single and Two-Channel Noise Reduction for Robust Speech Recognition (2002)
Stefanie Aalburg, Christophe Beaugeant, Sorel Stan, Tim Fingscheidt, Justinian Rosca, Stefanie Aalburg, ...
Hands-free operation of a mobile phone in car raises major challenges for acoustic enhancement algorithms and speech recognition engines. This is due to a degradation of the speech signal caused by...
Robustness of parametric source demixing in echoic environments (2001)
Radu Balan, Justinian Rosca, Scott Rickard
Blind source separation (BSS) of audio signals in echoic environments such as an office room is still a very challenging problem. Here we approach the problem from a practical perspective and shed...
Real-time time-frequency based blind source separation (2001)
Scott Rickard, Radu Balan, Justinian Rosca
We present a real-time version of the DUET algorithm for the blind separation of any number of sources using only two mixtures. The method applies when sources are Wdisjoint orthogonal, that is, when...
Real-time time-frequency based blind source separation (2001)
Scott Rickard, Radu Balan, Justinian Rosca
We present a real-time version of the DUET algorithm for the blind separation of any number of sources using only two mixtures. The method applies when sources are Wdisjoint orthogonal, that is, when...
Robustness of parametric source demixing in echoic environments (2001)
Radu Balan, Justinian Rosca, Scott Rickard
In this paper we present a robustness study of the two channel echoic parametric demixing problem. More specific, assume an oracle (or a perfect estimator) is providing a truncated estimate of the...
Broadband direction-of-arrival estimation based on second order statistics (2000)
Justinian Rosca, Joseph O Ruanaidh, Alexander Jourjine, Scott Rickard
N wideband sources recorded using N closely spaced receivers can feasibly be separated based only on second order statistics when using a physical model of the mixing process. In this case we show...
Broadband direction-of-arrival estimation based on second order statistics (2000)
Justinian Rosca, Joseph Ó Ruanaidh, Alexander Jourjine, Scott Rickard
N wideband sources recorded using N closely spaced receivers can feasibly be separated based only on second order statistics when using a physical model of the mixing process. In this case we show...
Broadband direction-of-arrival estimation based on second order statistics (2000)
Justinian Rosca, Joseph Ó Ruanaidh, Alexander Jourjine, Scott Rickard
N wideband sources recorded using N closely spaced receivers can feasibly be separated based only on second order statistics when using a physical model of the mixing process. In this case we show...
Generality versus Size in Genetic Programming (1996)
Genetic Programming (GP) uses variable size representations as programs. Size becomes an important and interesting emergent property of the structures evolved by GP. The size of programs can be both...
A Constraint-Based Control Architecture for Acting and Reasoning in Autonomous Robots (1995)
In this paper we will address several architectural decisions in defining a software control architecture for mobile robots. Our system is a collection of control primitives that enables the...