Pitch mark determination using a fundamental frequency based adaptable filter
First Claim
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1. A method of pitch mark determination for a speech signal, the method comprising the steps of:
- acquiring a fundamental frequency and a plurality of fundamental frequency passband signals by using an adaptable filter;
detecting a plurality of passing zero positions of the fundamental frequency passband signals;
generating at least a candidate set of pitch marks from a plurality of passing zero positions, the generating step including;
finding a highest position and a second highest position of the speech signals, using the passing zero positions, andfinding a lowest position and a second lowest position of the speech signals, using the passing zero positions; and
estimating the candidate set of pitch marks to generate a set of pitch marks by respectively calculating an aggregate error of each set of pitch marks, and then generating a corresponding set of pitch marks with a smallest aggregate error;
wherein calculating the aggregate error is by separately calculating an aggregate error of the wave peak of the speech signals and an aggregate error of the wave trough of the speech signals.
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Abstract
A method of pitch mark determination for a speech includes the following steps. First, a fundamental frequency and fundamental frequency passband signals are acquired by using an adaptable filter. Then, a number of passing zero positions of the fundamental frequency passband signals are detected. After that, at least a candidate set of pitch marks from a number of passing zero positions are generated. Lastly, the candidate set of pitch marks is estimated to generate the best set of pitch marks.
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Citations
11 Claims
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1. A method of pitch mark determination for a speech signal, the method comprising the steps of:
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acquiring a fundamental frequency and a plurality of fundamental frequency passband signals by using an adaptable filter; detecting a plurality of passing zero positions of the fundamental frequency passband signals; generating at least a candidate set of pitch marks from a plurality of passing zero positions, the generating step including; finding a highest position and a second highest position of the speech signals, using the passing zero positions, and finding a lowest position and a second lowest position of the speech signals, using the passing zero positions; and estimating the candidate set of pitch marks to generate a set of pitch marks by respectively calculating an aggregate error of each set of pitch marks, and then generating a corresponding set of pitch marks with a smallest aggregate error; wherein calculating the aggregate error is by separately calculating an aggregate error of the wave peak of the speech signals and an aggregate error of the wave trough of the speech signals. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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Specification