<p>KROTHAPALLI, CHANDRIKA. Developing Predictor Surfaces for Vowels and Voiced Fricatives for Lip Synchronization. (Under the direction of David F. McAllister, Robert D. Rodman and Donald Bitzer.)This paper describes a method to construct predictor surfaces for mouth parameters, using Delaunay triangulation. The first and second moments of the input speech signal are mapped to the shape of the mouth. Predictor surfaces are built for four external shape parameters of the mouth. The surfaces include shapes for vowels and some voiced fricatives. Described also is a method for developing real time animation synchronized with sound for vowel and voiced fricative utterances with or without silence and sequences of utterances. The content or kind of speech is not known in advance. Spectral analysis is used to classify the type of sound. Training sounds are used to generate predictor surfaces. Voiced samples containing single sound without any mouth movement during utterance are used to train the system. All the extreme mouth positions and frequently occurring mouth shapes are taken into consideration during training. Relative values of the mouth parameters are set for these sounds; interpolatory surfaces are built using this known data and are used to predict the parameter values for future recordings. Hermite cubic polynomials are used to generate the shapes necessary to depict a human mouth and the jaw. Voice of three speakers is recorded and a comparison of the surfaces of these speakers is made. A speaker-dependent lip synchronization system that develops animation for vowel and voiced fricative utterances is developed.<P>
| Identifer | oai:union.ndltd.org:NCSU/oai:NCSU:etd-20010318-122753 |
| Date | 11 June 2001 |
| Creators | Krothapalli, Chandrika |
| Contributors | David F. McAllister, Robert D. Rodman, Co-chair of Advisory Committee |
| Publisher | NCSU |
| Source Sets | North Carolina State University |
| Language | English |
| Detected Language | English |
| Type | text |
| Format | application/pdf |
| Source | http://www.lib.ncsu.edu/theses/available/etd-20010318-122753 |
| Rights | unrestricted, I hereby certify that, if appropriate, I have obtained and attached hereto a written permission statement from the owner(s) of each third party copyrighted matter to be included in my thesis, dissertation, or project report, allowing distribution as specified below. I certify that the version I submitted is the same as that approved by my advisory committee. I hereby grant to NC State University or its agents the non-exclusive license to archive and make accessible, under the conditions specified below, my thesis, dissertation, or project report in whole or in part in all forms of media, now or hereafter known. I retain all other ownership rights to the copyright of the thesis, dissertation or project report. I also retain the right to use in future works (such as articles or books) all or part of this thesis, dissertation, or project report. |
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