Poonam Bansal

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In this paper, we propose a speech recognition engine using hybrid model of Hidden Markov Model (HMM) and Gaussian Mixture Model (GMM). Both the models have been trained independently and the respective likelihood values have been considered jointly and input to a decision logic which provides net likelihood as the output. This hybrid model has been(More)
In this paper, a feature extraction method that is robust to additive background noise is proposed for automatic speech recognition. Since the background noise corrupts the autocorrelation coefficients of the speech signal mostly at the lower orders, while the higher-order autocorrelation coefficients are least affected, this method discards the lower order(More)
Noise robustness is one of the most challenging problem in automatic speech recognition. The goal of robust feature extraction is to improve the performance of speech recognition in adverse conditions. The mel-scaled frequency cepstral coefficients (MFCCs) derived from Fourier transform and filter bank analysis are perhaps the most widely used front-ends in(More)
This paper presents a new front-end for robust speech recognition. This new front-end scenario focuses on the spectral features of the filtered speech signals in the autocorrelation domain. The autocorrelation domain is well known for its pole preserving and noise separation properties. In this paper, a novel method for robust speech extraction is proposed(More)
Autoimmune encephalitides are a group of syndromes that may present with subacute onset of disorientation, personality changes, memory loss and most prominently seizures. Earlier reports of this entity were from patients with paraneoplastic limbic encephalitis, however autoimmune etiologies have also been described in patients with non-paraneoplastic(More)
In this paper, after an a review of the previous work done in this field, the most frequently used approach using Hidden Markov Model (HMM) is used for implementation for phonetic segmentation. A baseline HMM phonetic segmentation tool is used for segmentation and analysis of speech at phonetic level. The results are approximately same as obtained using(More)
Mobile Ad-hoc networks (MANETs) are defined as category of wireless network that utilize multi-hop radio relaying. These are capable of operating without support of any fixed infrastructure or centralized management. In MANETs network organization is carried out by the nodes themselves. Every node is capable to work as a sender, destination or as a(More)