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Acoustic measures of the cry characteristics of healthy newborns and newborns with pathologies

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Journal of Biomedical Science and Engineering 2013年第8期6卷 796-804页

作者： Yasmina Kheddache chakib tadj Department of Electrical Engineering école de Technologie Supérieure Montreal Canada

Several hypotheses have been formulated as a result of observing spectrograms of the audio signals of the newborn infant cry in numerous studies. Our study is based on a few of these hypotheses. The purpose of this article is to differentiate pathological crying from healthy crying through acoustic cry analysis based on neurophysiological parameters of newborns. The automatic estimation of the characteristics of relevant cry signals, such as phonation, hyperphonation, and dysphonation, expressed as percentages, as well as unvoiced sound and mode change percentages, have enabled us to distinguish among the pathologies selected for this study. The results obtained have helped us to make quantitative associations between cry characteristics and pathological conditions affecting newborns.

关键词： Newborn Cry Dysphonic Cry Noise Estimation

Characterization of Pathologic Cries of Newborns Based on Fundamental Frequency Estimation

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Engineering（科研） 2013年第10期5卷 272-276页

作者： Yasmina Kheddache chakib tadj Electrical Engineering Department école de technologie Supérieure Montréal Canada

The majority of the sick babies seem in good health at birth and early diagnosis of the various pathologies that can afflict newborn is crucial. For this reason we introduce in this paper the use of the fundamental frequency and the different modes of cries as Hyper-phonation, phonation and high pitched cries to differentiate the pathological cries from the cries of the healthy babies. The automatic estimation of these characteristics enabled us to establish a quantitative characterization of healthy newborn cries and pathologic newborn cries. The results obtained agree with the spectrographic analysis carried out on the healthy and pathologic cries of the newborns.

关键词： Newborns’ Cry Fundamental Frequency Cry Modes

Splitting of Gaussian Models via Adapted BML Method Pertaining to Cry-Based Diagnostic System

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Engineering（科研） 2013年第10期5卷 277-283页

作者： Hesam Farsaie Alaie chakib tadj Department of Electrical Engineering écolede Technology Supérieure Montréal Canada

In this paper,we make use of the boosting method to introduce a new learning algorithm for Gaussian Mixture Models (GMMs) called adapted Boosted Mixture Learning (BML). The method possesses the ability to rectify the existing problems in other conventional techniques for estimating the GMM parameters, due in part to a new mixing-up strategy to increase the number of Gaussian components. The discriminative splitting idea is employed for Gaussian mixture densities followed by learning via the introduced method. Then, the GMM classifier was applied to distinguish between healthy infants and those that present a selected set of medical conditions. Each group includes both full-term and premature infants. Cry-pattern for each pathological condition is created by using the adapted BML method and 13-dimensional Mel-Frequency Cepstral Coefficients (MFCCs) feature vector. The test results demonstrate that the introduced method for training GMMs has a better performance than the traditional method based upon random splitting and EM-based re-estimation as a reference system in multi-pathological classification task.

关键词： Adapted Boosted Mixture Learning Gaussian Mixture Model Splitting of Gaussians Expected-Maximization Algorithm Cry Signals

Modeling Rules Fission and Modality Selection Using Ontology

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Journal of Software Engineering and Applications 2013年第7期6卷 354-371页

作者： Atef Zaguia Ahmad Wahbi Moeiz Miraoui chakib tadj Amar Ramdane-Cherif LISV Laboratory Université de Versailles-Saint-Quentin-en-Yvelines Paris France MMS Laboratory Université du Québec école de Technologie Supérieure Montreal Canada

Researchers in computer science and computer engineering devote a significant part of their efforts on communication and interaction between man and machine. Indeed, with the advent of multimedia and multimodal processing in real time, the computer is no longer considered only as a computational tool, but as a machine for processing, communication, collection and control. Many machines assist and support many activities in daily life. The main objective of this paper is to propose a new methodological solution by modeling an architecture that facilitates the work of multimodal system especially for a fission module. To realize such systems, we rely on ontology to integrate data semantically. Ontologies provide a structured vocabulary usedas support for data representation. This paper provides a better understanding of the fission system and multimodal interaction. We present our architecture and the description of the detection of optimal modalities. This is done by using an ontological model that contains different applicable scenarios and describes the environment where a multimodal system exists.

关键词： Multimodal System Multimodal Fission Modality Ontology Interaction Context Pattern