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Please use this identifier to cite or link to this item: http://hdl.handle.net/2005/435

Title: Improved GMM-Based Classification Of Music Instrument Sounds
Authors: Krishna, A G
Advisors: Sreenivas, T V
Keywords: Musical Instruments - Sound-Pattern Perception
Sound-Pattern Perception
Music Instrument Recognition
Speaker Recognition
Gaussian Mixture Models
GMM
MIR
Speaker Identification
Speaker Segmentation
Music Instruments
Improved Classification
Submitted Date: May-2006
Series/Report no.: G20560
Abstract: This thesis concerns with the recognition of music instruments from isolated notes. Music instrument recognition is a relatively nascent problem fast gaining importance not only because of the academic value the problem provides, but also for the potential it has in being able to realize applications like music content analysis, music transcription etc. Line spectral frequencies are proposed as features for music instrument recognition and shown to perform better than Mel filtered cepstral coefficients and linear prediction cepstral coefficients. Assuming a linear model of sound production, features based on the prediction residual, which represents the excitation signal, is proposed. Four improvements are proposed for classification using Gaussian mixture model (GMM) based classifiers. One of them involves characterizing the regions of overlap between classes in the feature space to improve classification. Applications to music instrument recognition and speaker recognition are shown. An experiment is proposed for discovering the hierarchy in music instrument in a data-driven manner. The hierarchy thus discovered closely corresponds to the hierarchy defined by musicians and experts and therefore shows that the feature space has successfully captured the required features for music instrument characterization.
URI: http://hdl.handle.net/2005/435
Appears in Collections:Electrical Communication Engineering (ece)

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