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dc.contributor.advisorVishu R. Viswanathan and Thomas F. Quatieri.en_US
dc.contributor.authorChow, Carol S., 1978-en_US
dc.contributor.otherMassachusetts Institute of Technology. Dept. of Electrical Engineering and Computer Science.en_US
dc.date.accessioned2005-08-23T16:30:15Z
dc.date.available2005-08-23T16:30:15Z
dc.date.copyright2001en_US
dc.date.issued2001en_US
dc.identifier.urihttp://hdl.handle.net/1721.1/8937
dc.descriptionThesis (M.Eng. and S.B.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 2001.en_US
dc.descriptionIncludes bibliographical references (p. 67-68).en_US
dc.description.abstractThis is a thesis dissertation on objective speech quality measures. Two objective measures, Enhanced Modified Bark Spectral Distortion (EMBSD) and Perceptual Evaluation of Speech Quality (PESQ) were included in this study. The scope of the study covers the evaluation of EMBSD and PESQ in predicting subjective results from Mean Opinion Score (MOS) tests; an extension of PESQ to handle wideband speech; and the performance of EMBSD and PESQ on Degradation Mean Opinion Score (DMOS) tests in noise conditions. The following results are reported: (1) EMBSD can predict the quality of various conditions for a given coder, but not across coders. (2) PESQ can predict the quality of various conditions for a given coder as well as across coders. (3) While PESQ is effective in handling time shifts that occur during silence, it does not seem as effective when such shifts occur during speech. (4) A simple extension of PESQ can evaluate wideband speech as well as it evaluates narrowband speech. (5) When clean speech is used as reference, EMBSD predicts DMOS better than when noisy speech is used as reference. (6) PESQ predicts DMOS better when using noisy speech than with using clean speech as reference.en_US
dc.description.statementofresponsibilityby Carol S. Chow.en_US
dc.format.extent68 p.en_US
dc.format.extent4106724 bytes
dc.format.extent4106483 bytes
dc.format.mimetypeapplication/pdf
dc.format.mimetypeapplication/pdf
dc.language.isoengen_US
dc.publisherMassachusetts Institute of Technologyen_US
dc.rightsM.I.T. theses are protected by copyright. They may be viewed from this source for any purpose, but reproduction or distribution in any format is prohibited without written permission. See provided URL for inquiries about permission.en_US
dc.rights.urihttp://dspace.mit.edu/handle/1721.1/7582
dc.subjectElectrical Engineering and Computer Science.en_US
dc.titleResearch on objective speech quality measurementsen_US
dc.typeThesisen_US
dc.description.degreeM.Eng.and S.B.en_US
dc.contributor.departmentMassachusetts Institute of Technology. Dept. of Electrical Engineering and Computer Science.en_US
dc.identifier.oclc48983280en_US


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