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UBC Theses and Dissertations
Automatic infant cry analysis and recognition Xie, Qiaobing
Abstract
This dissertation is a report of my investigation on introducing modern speech process ing/recognition techniques to the field of infant cry research, and on developing efficient and effective methodologies for automatic assessment of the physical/emotional situation of infants using the information derived from the cry signals. I first identify some problems facing present infant cry research, especially those obstruct ing the practical applications of the results generated from basic research. By demonstrating the similarities between infant cry generation and adult speech generation, I establish the theoretical foundation for the development of my new automatic cry processing/analysis tech niques. In particular, I develop the new concept of cry phonemes as an effective method for representing cry signals for automatic cry analysis. Based on the cry phonemes, I further define a composite parameter, the H-value, which can be calculated from the cry signal, and is found to be a reliable indicator of the distress level of the infant. Using these new concepts, I design two automatic infant cry analysis systems. One system is based on my newly developed nonparametric VQ-kernel classifier, and the other system is based on the Hidden Markov Model technique. Each of these systems estimates the H-value from the cry signal automatically. This, in turn, is utilized in the automatic assessment of the infant’s distress level. The performance of these two systems was evaluated with cries uttered by 36 infants. I found that both systems give assessments of infants’ distress levels consistent with the perceptions of experienced parents who listened to the recording of the same cries. This demonstrates the effectiveness of my newly developed techniques. In addition, the methodologies developed in this research can be easily generalized and applied to other problems of normal and abnormal infant cry analysis.
Item Metadata
Title |
Automatic infant cry analysis and recognition
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Creator | |
Publisher |
University of British Columbia
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Date Issued |
1994
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Description |
This dissertation is a report of my investigation on introducing modern speech process
ing/recognition techniques to the field of infant cry research, and on developing efficient
and effective methodologies for automatic assessment of the physical/emotional situation of
infants using the information derived from the cry signals.
I first identify some problems facing present infant cry research, especially those obstruct
ing the practical applications of the results generated from basic research. By demonstrating
the similarities between infant cry generation and adult speech generation, I establish the
theoretical foundation for the development of my new automatic cry processing/analysis tech
niques.
In particular, I develop the new concept of cry phonemes as an effective method for
representing cry signals for automatic cry analysis. Based on the cry phonemes, I further
define a composite parameter, the H-value, which can be calculated from the cry signal, and
is found to be a reliable indicator of the distress level of the infant.
Using these new concepts, I design two automatic infant cry analysis systems. One system
is based on my newly developed nonparametric VQ-kernel classifier, and the other system is
based on the Hidden Markov Model technique. Each of these systems estimates the H-value
from the cry signal automatically. This, in turn, is utilized in the automatic assessment of
the infant’s distress level.
The performance of these two systems was evaluated with cries uttered by 36 infants.
I found that both systems give assessments of infants’ distress levels consistent with the
perceptions of experienced parents who listened to the recording of the same cries. This
demonstrates the effectiveness of my newly developed techniques.
In addition, the methodologies developed in this research can be easily generalized and
applied to other problems of normal and abnormal infant cry analysis.
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Extent |
2652749 bytes
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Genre | |
Type | |
File Format |
application/pdf
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Language |
eng
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Date Available |
2009-04-08
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Provider |
Vancouver : University of British Columbia Library
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Rights |
For non-commercial purposes only, such as research, private study and education. Additional conditions apply, see Terms of Use https://open.library.ubc.ca/terms_of_use.
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DOI |
10.14288/1.0065020
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URI | |
Degree | |
Program | |
Affiliation | |
Degree Grantor |
University of British Columbia
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Graduation Date |
1994-05
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Campus | |
Scholarly Level |
Graduate
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Aggregated Source Repository |
DSpace
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Item Media
Item Citations and Data
Rights
For non-commercial purposes only, such as research, private study and education. Additional conditions apply, see Terms of Use https://open.library.ubc.ca/terms_of_use.