Method And Apparatus Of Generating Text Script For A Corpus-Based Text-To Speech System
First Claim
1. A method of text script generation for a corpus-based text-to-speech system, comprising:
- (a) searching in a source corpus having L sentences, selecting N sentences with a best integrated efficiency as N best cases, and setting iteration k to be 1, k , L and N being natural numbers, N≦
L;
(b) for each case n of the N best cases, 1≦
n≦
N, searching in said source corpus and selecting Mk+1 best sentences with the best integrated efficiency from the unselected sentences in said source corpus, 1≦
Mk+1≦
L;
(c) searching in said source corpus and keeping N best cases out of the total unselected sentences for next iteration, and increasing iteration k by 1; and
(d) if a termination criterion being reached, setting the best case in the N traced cases as the text script, otherwise, returning to step (b);
wherein said best integrated efficiency depends on a function of combining the covering rate efficiency of unit types, the hit rate efficiency of unit types, and the text script size.
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Abstract
A method of text script generation for a corpus-based text-to-speech system includes searching in a source corpus having L sentences, selecting N sentences with a best integrated efficiency as N best cases, and setting iteration k to be 1; for each case n of the N best cases, selecting Mk+1 best sentences with the best integrated efficiency from the unselected sentences in the source corpus; keeping N best cases out of the total unselected sentences for next iteration, and increasing iteration k by 1; and if a termination criterion being reached, setting the best case in the N traced cases as the text script, otherwise, returning to the (k+1)th iteration of searching in the unselected sentences for (k+1)th sentence; wherein the best integrated efficiency depends on a function of combining the covering rate of the synthesis unit type, the hit rate of the synthesis unit type, and the text script size.
3 Citations
14 Claims
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1. A method of text script generation for a corpus-based text-to-speech system, comprising:
-
(a) searching in a source corpus having L sentences, selecting N sentences with a best integrated efficiency as N best cases, and setting iteration k to be 1, k , L and N being natural numbers, N≦
L;
(b) for each case n of the N best cases, 1≦
n≦
N, searching in said source corpus and selecting Mk+1 best sentences with the best integrated efficiency from the unselected sentences in said source corpus, 1≦
Mk+1≦
L;
(c) searching in said source corpus and keeping N best cases out of the total unselected sentences for next iteration, and increasing iteration k by 1; and
(d) if a termination criterion being reached, setting the best case in the N traced cases as the text script, otherwise, returning to step (b);
wherein said best integrated efficiency depends on a function of combining the covering rate efficiency of unit types, the hit rate efficiency of unit types, and the text script size. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A text script generator for a corpus-based text-to-speech system, comprising:
-
a search criteria selector for searching in a source corpus having L sentences, and selecting N sentences with a best integrated efficiency as N best cases, L and N being natural numbers, N≦
L;
a performance index constructor coupled to said search criteria selector, for providing covering rate and hit rate corresponding to all unit types in said source corpus; and
a termination criteria detector coupled to said search criteria selector, for generating a best case in the N traced cases as a text script upon detecting a termination criterion is reached;
wherein said best integrated efficiency depends on a function of combining the covering rate efficiency of unit types, the hit rate efficiency of unit types, and the size of said text script. - View Dependent Claims (12, 13, 14)
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Specification