Prosody generating device, prosody generating method, and program
First Claim
1. A prosody generation apparatus that receives phonological information and linguistic information so as to generate prosody, the prosody generation apparatus referring to (a) a variation estimation rule storage unit that stores a variation estimation rule of prosody at prosody changing points, the variation estimation rule being predetermined beforehand according to attributes concerning phonology or attributes concerning linguistic information of the prosody changing points of speech data;
- and (b) an absolute value estimation rule storage unit that stores an absolute value estimation rule of the prosody at the prosody changing points, the absolute value estimation rule being predetermined beforehand according to attributes concerning the phonology or the linguistic information of the prosody changing points of the speech data;
comprising;
a prosody changing point setting unit that sets a prosody changing point according to at least any one of the received phonological information and the linguistic information;
a variation estimation unit that estimates a variation of prosody at the prosody changing point according to the estimation rule stored in the variation estimation rule storage unit, based on the received phonological information and the linguistic information;
an absolute value estimation unit that estimates an absolute value of the prosody at the prosody changing point according to the absolute value estimation rule stored in the absolute value estimation rule storage unit, based on the received phonological information and the linguistic information; and
a prosody generation unit that generates prosody for a prosody changing point by shifting the variation estimated by the variation estimation unit so as to correspond to the absolute value obtained by the absolute value estimation unit and generates prosody for a portion other than prosody changing points by carrying out interpolation between the thus generated prosody for prosody changing points.
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Abstract
A prosody generation apparatus capable of suppressing distortion that occurs when generating prosodic patterns and therefore generating a natural prosody is provided. A prosody changing point extraction unit in this apparatus extracts a prosody changing point located at the beginning and the ending of a sentence, the beginning and the ending of a breath group, an accent position and the like. A selection rule and a transformation rule of a prosodic pattern including the prosody changing point is generated by means of a statistical or learning technique and the thus generate rules are stored in a representative prosodic pattern selection rule table and a transformation rule table beforehand. A pattern selection unit selects a representative prosodic pattern from the representative prosodic pattern selection rule table according to the selection rule. A prosody generation unit transforms the selected pattern according to the transformation rule and carries out interpolation with respect to portions other than the prosody changing points so as to generate prosody as a whole.
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Citations
28 Claims
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1. A prosody generation apparatus that receives phonological information and linguistic information so as to generate prosody, the prosody generation apparatus referring to (a) a variation estimation rule storage unit that stores a variation estimation rule of prosody at prosody changing points, the variation estimation rule being predetermined beforehand according to attributes concerning phonology or attributes concerning linguistic information of the prosody changing points of speech data;
- and (b) an absolute value estimation rule storage unit that stores an absolute value estimation rule of the prosody at the prosody changing points, the absolute value estimation rule being predetermined beforehand according to attributes concerning the phonology or the linguistic information of the prosody changing points of the speech data;
comprising;a prosody changing point setting unit that sets a prosody changing point according to at least any one of the received phonological information and the linguistic information; a variation estimation unit that estimates a variation of prosody at the prosody changing point according to the estimation rule stored in the variation estimation rule storage unit, based on the received phonological information and the linguistic information; an absolute value estimation unit that estimates an absolute value of the prosody at the prosody changing point according to the absolute value estimation rule stored in the absolute value estimation rule storage unit, based on the received phonological information and the linguistic information; and a prosody generation unit that generates prosody for a prosody changing point by shifting the variation estimated by the variation estimation unit so as to correspond to the absolute value obtained by the absolute value estimation unit and generates prosody for a portion other than prosody changing points by carrying out interpolation between the thus generated prosody for prosody changing points. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26)
- and (b) an absolute value estimation rule storage unit that stores an absolute value estimation rule of the prosody at the prosody changing points, the absolute value estimation rule being predetermined beforehand according to attributes concerning the phonology or the linguistic information of the prosody changing points of the speech data;
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27. A prosody generation method by which phonological information and linguistic information are inputted so as to generate prosody, comprising the steps of:
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setting a prosody changing point according to at least any one of the inputted phonological information and linguistic information; estimating a variation of prosody at the prosody changing point according to a variation estimation rule predetermined beforehand according to attributes concerning phonology or attributes concerning linguistic information of the prosody changing point of speech data, based on the inputted phonological information and linguistic information; estimating an absolute value of the prosody at the prosody changing point according to an absolute value estimation rule predetermined beforehand according to attributes concerning the phonology or the linguistic information of the prosody changing point of the speech data, based on the inputted phonological information and the linguistic information; and generating prosody for a prosody changing point by shifting the estimated variation so as to correspond to the estimated absolute value and generating prosody for a portion other than prosody changing points by carrying out interpolation between the thus generated prosody for prosody changing points.
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28. A computer program stored in a computer-readable medium that has a computer conduct a procedure of receiving phonological information and linguistic information so as to generate prosody, the computer referring to (a) a variation estimation rule storage unit that stores a variation estimation rule of prosody at prosody changing points, the variation estimation rule being predetermined beforehand according to attributes concerning phonology or attributes concerning linguistic information of the prosody changing points of speech data;
- and (b) an absolute value estimation rule storage unit that stores an absolute value estimation rule of the prosody at the prosody changing points, the absolute value estimation rule being predetermined beforehand according to attributes concerning the phonology or the linguistic information of the prosody changing points of the speech data;
the program having the computer conduct the steps of;setting a prosody changing point according to at least any one of the received phonological information and the linguistic information; estimating a variation of the prosody at the prosody changing point according to the estimation rule stored in the variation estimation rule storage unit, based on the received phonological information and the linguistic information; estimating an absolute value of prosody at the prosody changing point according to the absolute value estimation rule stored in the absolute value estimation rule storage unit, based on the received phonological information and the linguistic information; and generating prosody for a prosody changing point by shifting the variation estimated by the variation estimation unit so as to correspond to the absolute value obtained by the absolute value estimation unit and generating prosody for a portion other than prosody changing points by carrying out interpolation between the thus generated prosody for prosody changing points.
- and (b) an absolute value estimation rule storage unit that stores an absolute value estimation rule of the prosody at the prosody changing points, the absolute value estimation rule being predetermined beforehand according to attributes concerning the phonology or the linguistic information of the prosody changing points of the speech data;
Specification