TY - GEN
T1 - Making conversational vowels more clear
AU - Mohammadi, Seyed Hamidreza
AU - Kain, Alexander
AU - Van Santen, Jan
PY - 2012/12/1
Y1 - 2012/12/1
N2 - Previously, it has been shown that using clear speech short-term spectra improves the intelligibility of conversational speech. In this paper, a speech transformation method is used to map the spectral features of conversational speech to resemble clear speech. A joint-density Gaussian mixture model is used as the mapping function. The transformation is studied in both the formant frequency and the line spectral frequency domains. Listening test results show that in noisier environments, the transformed speech signal improves vowel intelligibility significantly compared to the original conversational speech. There is also an increase in vowel intelligibility in less noisy environments, but the increase is not statistically significant. The significance tests are performed by Tukey comparison and planned one-tail t-test methods.
AB - Previously, it has been shown that using clear speech short-term spectra improves the intelligibility of conversational speech. In this paper, a speech transformation method is used to map the spectral features of conversational speech to resemble clear speech. A joint-density Gaussian mixture model is used as the mapping function. The transformation is studied in both the formant frequency and the line spectral frequency domains. Listening test results show that in noisier environments, the transformed speech signal improves vowel intelligibility significantly compared to the original conversational speech. There is also an increase in vowel intelligibility in less noisy environments, but the increase is not statistically significant. The significance tests are performed by Tukey comparison and planned one-tail t-test methods.
KW - Clear speech
KW - Conversational speech
KW - Intelligibility
KW - Speech transformation
UR - http://www.scopus.com/inward/record.url?scp=84878384703&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84878384703&partnerID=8YFLogxK
M3 - Conference contribution
AN - SCOPUS:84878384703
SN - 9781622767595
T3 - 13th Annual Conference of the International Speech Communication Association 2012, INTERSPEECH 2012
SP - 642
EP - 645
BT - 13th Annual Conference of the International Speech Communication Association 2012, INTERSPEECH 2012
T2 - 13th Annual Conference of the International Speech Communication Association 2012, INTERSPEECH 2012
Y2 - 9 September 2012 through 13 September 2012
ER -