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Phonetic Engine (PE) is a system that is used to determine the sequence of phones in a spoken utterance. In order to transcribe the speech database, International Phonetic Alphabet (IPA) is used. This work focuses on developing multilingual PE for four Indian languages namely, Bengali, Hindi, Urdu and Telugu. The number of languages can be increased to any number. For developing the PE, read speech...
In this paper we analyse the variation of the gesture recognition accuracy of several time series classifiers, based on input provided by two different sensors: Kinect for XBox 360 (Kinect 1) and its improved, newer version, Kinect for XBox One (Kinect 2). This work builds upon a previous study analysing classifiers' performance on pose recognition, considering multiple factors, such as the machine...
Affect bursts are short, isolated and non-verbal expressions of affect expressed vocally or facially. In this paper we present an attempt at synthesizing audio affect bursts on several levels of arousal. This work concerns 3 different types of affect bursts: disgust, startle and surprised expressions. Data are first gathered for each of these affect bursts at two different levels of arousal each....
The information construction plays an essential role in the area of public security. However, the “Information Silo” phenomenon in Public Security Department has become a bottleneck of the development of public security. The paper proposes a novel approach to implement a public security knowledge navigation system, utilizing the information extraction to obtain the ontology for the topic maps of public...
We propose an improved approach for distinguishing between healthy subjects and patients with pulmonary emphysema by the use of one stochastic acoustic model for continuous adventitious sounds and another for discontinuous adventitious sounds. These models are able to represent the spectral features of the adventitious sounds for the detection of abnormal respiration. However, abnormal respiratory...
Online signature verification has been a research topic of great interest, in line with the increasingly high security requirements of a networked society. In this paper, an online signature verification system based on the nearest template matching is designed. A set of function features are employed for comparing the dissimilarity between the test signature and the template database. The difference...
In current society, reliable identification and verification of individuals are becoming more and more necessary tasks for many fields, not only in police environment, but also in civilian applications, such as access control or financial transactions. Biometric systems are used nowadays in these fields, offering greater convenience and several advantages over traditional security methods based on...
We propose a method to improve the consistency of human evaluation of non-native speaker's utterance, with a capability to evaluate features such as accent and rhythm. In this method, human evaluators evaluate the accent and the rhythm independently by using average voice model and prosody substitution. We also investigated the advantages of evaluating those features independently. We found that,...
Historical documents are essentially formed of handwritten texts that exhibit a variety of perceptual environment complexities. The cursive and connected nature of text lines on one hand and the presence of artefacts and noise on the other hand hinder achieving plausible results using current image processing algorithm. In this paper, we present a new algorithm which we termed QTE (Query by Text Example)...
In this work, a new feature, residual sinusoidal peak amplitude (RSPA), is proposed for emotion classification. The RSPA feature is evaluated from the LP residual of the speech signal using sinusoidal model. Residual signal is a major source of the excitation and it is expected that emotional information can be well manifested in the residual signal. The effectiveness of the proposed feature is explored...
Video cataloging is the main technology of video management and reuse. It helps to quickly and accurately query tapes or films and improves work efficiency greatly. However, current cataloging is performed manually because existing computer-aided cataloging system can't achieve expected accuracy and speed. In this paper, it proposes an algorithm to control video structure analysis process cleverly...
This paper presents a simple and fast face recognition system based on two states of discrete Hidden Markov Model (HMM). The minimization in the number of states leads to high processing speed and less memory occupation. Median filter is applied to each image under process, where it is the most suitable filter used to eliminate the effect of noise on images, and thereby enhancing the performance of...
Due to importance of security in the society, monitoring activities and recognizing specific people through surveillance video camera is playing an important role. One of the main issues in such activity rises from the fact that cameras do not meet the resolution requirement for many face recognition algorithm. In order to solve this issue, in this paper we are proposing a new system which super resolve...
The current proliferation of mobile devices raises an important issue: that of intelligent authentication mechanisms based on sensors within handheld devices. On-line signatures can now be easily captured with the fingertip on mobile devices. We study the performance of on-line signature authentication systems on touchscreen-based mobile devices. Performance evaluations were carried out on the DooDB...
Fast and precise spectrum opportunity (SOP) exploration is a fundamental and vital procedure for dynamic spectrum management. In this paper, the temporal rather than geographical feature of spectrum database is investigated. The spectrum prediction is formulated and taken as a function of spectrum database. Furthermore, spectrum sensing is also a choice for SOP exploration to cope with the inefficiency...
SQL Injection Attack (SQLIA) has been consistently ranked among the top security threats against web applications for more than a decade. Nowadays, attackers use sophisticated tools to launch automated injection attacks. The problem of prevention and detection of SQLIA has been long attended by the research community, but hardly any solution exists for protecting multiple websites in a shared hosting...
Paralinguistic sounds such as laughter, cry and cough etc. communicate different messages as well, apart from the linguistic content in speech. These non-verbal speech sounds may possibly communicate some emotion, gesture or physiological condition of a human being. Cough sounds mostly indicate symptoms of a disease and are used sometimes as a gesture to draw attention. Analysing cough sounds using...
This paper proposes a new excitation modeling method for improving the quality of HMM-based speech synthesis. The proposed excitation or source modeling method models the pitch-synchronous residual frames extracted from the excitation signal. Initially, principal component analysis is performed on the pitch-synchronous residual frames. Based on the analysis, the pitch synchronous residual frames are...
Meetings are an important communication and coordination activity of teams: status is discussed, new decisions are made, alternatives are considered, details are explained, information is presented, and new ideas are generated. As such, meetings contain a large amount of rich project information that is often not formally documented. Capturing all of this informal meeting information has been a topic...
Scholarly digital libraries have become an important source of bibliographic records for scientific communities. Author name search is one of the most common query exercised in digital libraries. The name ambiguity problem in the context of author search in digital libraries, arising from multiple authors sharing the same name, poses many challenges. A number of name disambiguation methods have been...
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