Method for detecting misaligned phonetic units for a concatenative text-to-speech voice
First Claim
1. A method of filtering phonetic units to be used within a concatenative text-to-speech voice, comprising the steps of:
- receiving into a filtering system at least one phonetic unit that has been automatically extracted from a speech corpus in order to construct a concatenative text-to-speech voice;
calculating an abnormality index for said phonetic unit, wherein said abnormality index indicates a likelihood of said phonetic unit being misaligned;
comparing said abnormality index to a normality threshold;
if said abnormality index does not exceed said normality threshold, marking said phonetic unit as a verified phonetic unit; and
,building said concatenative text-to-speech voice using said verified phonetic units.
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Abstract
A method of filtering phonetic units to be used within a concatenative text-to-speech (CTTS) voice. Initially, a normality threshold can be established. At least one phonetic unit that has been automatically extracted from a speech corpus in order to construct the CTTS voice can be received. An abnormality index can be calculated for the phonetic unit. Then, the abnormality index can be compared to the established normality threshold. If the abnormality index exceeds the normality threshold, the phonetic unit can be marked as a suspect phonetic unit. If the abnormality index does not exceed the normality threshold, the phonetic unit can be marked as a verified phonetic unit. The concatenative text-to-speech voice can be built using the verified phonetic units.
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Citations
23 Claims
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1. A method of filtering phonetic units to be used within a concatenative text-to-speech voice, comprising the steps of:
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receiving into a filtering system at least one phonetic unit that has been automatically extracted from a speech corpus in order to construct a concatenative text-to-speech voice; calculating an abnormality index for said phonetic unit, wherein said abnormality index indicates a likelihood of said phonetic unit being misaligned; comparing said abnormality index to a normality threshold; if said abnormality index does not exceed said normality threshold, marking said phonetic unit as a verified phonetic unit; and
,building said concatenative text-to-speech voice using said verified phonetic units. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A system of filtering phonetic units to be used within a concatenative text-to-speech voice, comprising:
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means for receiving at least one phonetic unit that has been automatically extracted from a speech corpus in order to construct a concatenative text-to-speech voice; means for calculating an abnormality index for said phonetic unit, wherein said abnormality index indicates a likelihood of said phonetic unit being misaligned; means for comparing said abnormality index to a normality threshold; means for marking said phonetic unit as a verified phonetic unit when said abnormality index does not exceed said normality threshold; and
,means for building said concatenative text-to-speech voice using said verified phonetic units.
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13. A computer-readable storage medium having stored thereon, a computer program having a plurality of code sections, said code sections executable by a computer for causing the computer to perform the steps of:
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receiving into the computer at least one phonetic unit that has been automatically extracted from a speech corpus in order to construct a concatenative text-to-speech voice; calculating an abnormality index for said phonetic unit, wherein said abnormality index indicates a likelihood of said phonetic unit being misaligned; comparing said abnormality index to a normality threshold; if said abnormality index does not exceed said normality threshold, marking said phonetic unit as a verified phonetic unit; and
,building said concatenative text-to-speech voice using said verified phonetic units. - View Dependent Claims (14, 15, 16, 17, 18, 19, 20, 21, 22, 23)
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Specification