Force Alignment using HMM 2

This is the continuation of the post before. This discussion on this post is: The variation of accuracy and correctness based on the number of observation mixtures. How does adding noise affect our recognition accuracy (The experiment done in our last post involves clean test input) The confusion matrix of our test results     […]

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Spectrum Analysis of EEG Signal

Introduction By using EEG to collect EEG data from our brain, sometimes we will need to know which frequency band does our signal fall in to provide more features and information for later tasks. In this experiment, we are about to analyze a signal using Fast Fourier Transform (FFT) and Power Spectral Density (PSD). There […]

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GMM-Based Speaker Recognition

Introduction GMM vs K-Means First, we’ll have to understand what are hard decisions and soft decisions . Hard Decision A data point is clustered to a single cluster and the results are final. Soft Decision A data point is modeled by a distribution of clusters, thus it will be probabilistically defined and there’s no definite […]

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Linear Models for Classification

Introduction There’re 3 major methods on working with classification: Discriminant Function Probabilistic Generative Model Probabilistic Discriminative Model The first method is brute-force method which is what neural networks uses. It consist of least square classification, Fisher’s linear discriminant and perceptron algorithm. Our focus will be on the following 2 models which involves a probabilistic viewpoint. […]

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