Method of synthesis for a steady sound signal
First Claim
1. A method of synthesizing a first sound signal based on a second sound signal, the first sound signal having a required first fundamental frequency and the second sound signal having a second fundamental frequency, the method comprising the steps of:
- determining of required pitch bell locations in the time domain of the first sound signal, the pitch bell locations being distanced by one period of the first fundamental frequency, providing of pitch bells by windowing the second sound signal on pitch bell locations in the time domain of the second sound signal, the pitch bell locations being distanced by one period of the second fundamental frequency, randomly selecting of a pitch bell from the provided pitch bells for each of the required pitch bell locations, performing an overlap and add operation on the selected pitch bells for synthesizing the first signal.
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Abstract
The present invention relates to a method of synthesizing a first sound signal based on a second sound signal, the first sound signal having a required first fundamental frequency and the second sound signal having a second fundamental frequency, the method comprising the steps of, a) determining of required pitch bell locations in the time domain of the first sound signal, the pitch bell locations being distanced by one period of the first fundamental frequency, b) providing of pitch bells by windowing the second sound signal on pitch bell locations in the time domain of the second sound signal, the pitch bell locations being distanced by one period of the second fundamental frequency, c) randomly selecting of a pitch bell from the provided pitch bells for each of the required pitch bell locations, d) performing an overlap and add operation on the selected pitch bells for synthesizing the first signal.
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Citations
11 Claims
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1. A method of synthesizing a first sound signal based on a second sound signal, the first sound signal having a required first fundamental frequency and the second sound signal having a second fundamental frequency, the method comprising the steps of:
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determining of required pitch bell locations in the time domain of the first sound signal, the pitch bell locations being distanced by one period of the first fundamental frequency, providing of pitch bells by windowing the second sound signal on pitch bell locations in the time domain of the second sound signal, the pitch bell locations being distanced by one period of the second fundamental frequency, randomly selecting of a pitch bell from the provided pitch bells for each of the required pitch bell locations, performing an overlap and add operation on the selected pitch bells for synthesizing the first signal. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A computer program product, in particular digital storage medium, comprising program means for synthesizing of a first sound signal based on a second sound signal, the first sound signal having a required first fundamental frequency and the second sound signal having a second fundamental frequency, the program means being adapted to perform the steps of:
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determining of required pitch bell locations in the time domain of the first sound signal, the pitch bell locations being distanced by one period of the first fundamental frequency, providing of pitch bells by windowing the second sound signal on pitch bell locations in the time domain of the second sound signal, the pitch bell locations being distanced by one period of the second fundamental frequency, randomly selecting of a pitch bell from the provided pitch bells for each of the required pitch bell locations, performing an overlap and add operation on the selected pitch bells for synthesizing the first signal.
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9. A computer system, in particular text-to-speech synthesis system, for synthesizing a first sound signal based on a second sound signal, the first sound signal having a required first fundamental frequency and the second sound signal having a second fundamental frequency, the computer system comprising:
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means for determining of required pitch bell locations in the time domain of the first sound signal, the pitch bell locations being distanced by one period of the first fundamental frequency, means for providing of pitch bells by windowing the second sound signal on pitch bell locations in the time domain of the second sound signal, the pitch bell locations being distanced by one period of the second fundamental frequency, means for randomly selecting of a pitch bell from the provided pitch bells for each of the required pitch bell locations, means for performing an overlap and add operation on the selected pitch bells for synthesizing the first signal. - View Dependent Claims (10)
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11. A synthesizing signal comprising a number of pitch bells which are overlapped and added, each of the pitch bells being randomly selected from a set of pitch bells which are obtained by windowing of an original sound signal on pitch bell locations in the time domain of the second sound signal, the pitch bell locations being distanced by one period of the fundamental frequency.
Specification