Objective measure for estimating mean opinion score of synthesized speech
First Claim
1. A method for estimating naturalness of synthesized speech, wherein naturalness is a subjective quality of synthesized speech, the method comprising:
- generating a set of synthesized utterances;
subjectively rating each of the synthesized utterances;
calculating a score for each of the synthesized utterances using an objective measure, the objective measure being a function of textual information derived from the utterances;
ascertaining a relationship between the scores of the objective measure and subjective ratings of the synthesized utterances; and
using the relationship to estimate naturalness of synthesized speech.
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Abstract
A method for estimating mean opinion score or naturalness of synthesized speech is provided. The method includes using an objective measure that has components derived directly from textual information used to form synthesized utterances. The objective measure has a high correlation with mean opinion score such that a relationship can be formed between the objective measure and corresponding mean opinion score. An estimated mean opinion score can be obtained easily from the relationship when the objective measure is applied to utterances of a modified speech synthesizer.
174 Citations
29 Claims
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1. A method for estimating naturalness of synthesized speech, wherein naturalness is a subjective quality of synthesized speech, the method comprising:
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generating a set of synthesized utterances;
subjectively rating each of the synthesized utterances;
calculating a score for each of the synthesized utterances using an objective measure, the objective measure being a function of textual information derived from the utterances;
ascertaining a relationship between the scores of the objective measure and subjective ratings of the synthesized utterances; and
using the relationship to estimate naturalness of synthesized speech. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18)
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19. A method for developing a speech synthesizer, the method comprising:
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obtaining a set of synthesized utterances from the speech synthesizer;
subjectively rating naturalness of each of the synthesized utterances;
calculating a score for each of the synthesized utterances using an objective measure, the objective measure being a function of textual information of speech units for each of the utterances;
ascertaining a relationship between the scores of the objective measure and ratings of the synthesized utterances;
varying a parameter of the speech synthesizer;
obtaining speech units for another utterance after the parameter of the speech synthesizer has been varied; and
calculating a second score for said another utterance using the objective measure; and
using the relationship and the second score to estimate naturalness of said another utterance. - View Dependent Claims (20, 21, 22, 23, 24, 25, 26, 27, 28, 29)
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Specification