FUNDAMENTAL FREQUENCY PATTERN GENERATION APPARATUS AND FUNDAMENTAL FREQUENCY PATTERN GENERATION METHOD
First Claim
1. A fundamental frequency pattern generation apparatus comprising:
- a first storage unit to store a plurality of representative vectors each corresponding to a prosodic control unit and having a section for changing the number of phonemes;
a second storage unit to store a rule to select a representative vector corresponding to an input context;
a selection unit configured to select the representative vector corresponding to the input context from the plurality of representative vectors by applying the rule to the input context and output the selected representative vector;
a calculation unit configured to calculate an expansion/contraction ratio of the section of the selected representative vector in a time-axis direction based on a designated value for a specific feature amount related to a length of a fundamental frequency pattern to be generated, the designated value of the feature amount being required of the fundamental frequency pattern to be generated; and
an expansion/contraction unit configured to expand/contract the selected representative vector based on the expansion/contraction ratio to generate the fundamental frequency pattern.
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Accused Products
Abstract
A fundamental frequency pattern generation apparatus includes a first storage including representative vectors each corresponding to a prosodic control unit and having a section for changing the number of phonemes, a second storage unit including a rule to select a vector corresponding to an input context, a selection unit configured to select a vector from the representative vectors by applying the rule to the context and output the selected vector, a calculation unit configured to calculate an expansion/contraction ratio of the section of the selected vector in a time-axis direction based on a designated value for a specific feature amount related to a length of a fundamental frequency pattern to be generated, the designated value of the feature amount being required of the fundamental frequency pattern to be generated, and an expansion/contraction unit configured to expand/contract the selected vector based on the expansion/contraction ratio to generate the fundamental frequency pattern.
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Citations
18 Claims
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1. A fundamental frequency pattern generation apparatus comprising:
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a first storage unit to store a plurality of representative vectors each corresponding to a prosodic control unit and having a section for changing the number of phonemes; a second storage unit to store a rule to select a representative vector corresponding to an input context; a selection unit configured to select the representative vector corresponding to the input context from the plurality of representative vectors by applying the rule to the input context and output the selected representative vector; a calculation unit configured to calculate an expansion/contraction ratio of the section of the selected representative vector in a time-axis direction based on a designated value for a specific feature amount related to a length of a fundamental frequency pattern to be generated, the designated value of the feature amount being required of the fundamental frequency pattern to be generated; and an expansion/contraction unit configured to expand/contract the selected representative vector based on the expansion/contraction ratio to generate the fundamental frequency pattern. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
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17. A fundamental frequency pattern generation method comprising:
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preparing in advance a first storage to store a plurality of representative vectors each corresponding to a prosodic control unit and having a section for changing the number of phonemes, preparing in advance a second storage unit to store a rule to select a representative vector corresponding to an input context, selecting the representative vector corresponding to the input context from the plurality of representative vectors by applying the rule to the input context and outputting the selected representative vector; calculating an expansion/contraction ratio of the section of the selected representative vector in a time-axis direction based on a designated value for a specific feature amount related to a length of a fundamental frequency pattern to be generated, the designated value of the feature amount being required of the fundamental frequency pattern to be generated; and expanding/contracting the selected representative vector based on the expansion/contraction ratio to generate the fundamental frequency pattern.
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18. A computer readable storage medium storing instructions of a computer program which when executed by a computer results in performance of steps comprising:
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preparing in advance a first storage to store a plurality of representative vectors each corresponding to a prosodic control unit and having a section for changing the number of phonemes, preparing in advance a second storage unit to store a rule to select a representative vector corresponding to an input context, selecting the representative vector corresponding to the input context from the plurality of representative vectors by applying the rule to the input context and outputting the selected representative vector; calculating an expansion/contraction ratio of the section of the selected representative vector in a time-axis direction based on a designated value for a specific feature amount related to a length of a fundamental frequency pattern to be generated, the designated value of the feature amount being required of the fundamental frequency pattern to be generated; and expanding/contracting the selected representative vector based on the expansion/contraction ratio to generate the fundamental frequency pattern.
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Specification