Pitch determination for speech processing
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Abstract
There is provided a method of selecting a pitch lag value for a portion of a speech signal, the method comprising: computing a weighted correlation function of the portion of the speech signal for a range of delay times, wherein the weighting of the correlation function depends on both the delay time and a characteristic of one or more previous portions of the speech signal; and selecting the pitch lag value based on a delay time from the range of delay times that maximizes the weighted correlation function.
111 Citations
22 Claims
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1-20. -20. (canceled)
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21. A method of selecting a pitch lag value for a portion of a speech signal, the method comprising:
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computing a weighted correlation function of the portion of the speech signal for a range of delay times, wherein the weighting of the correlation function depends on both the delay time and a characteristic of one or more previous portions of the speech signal; and selecting the pitch lag value based on a delay time from the range of delay times that maximizes the weighted correlation function.
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22. A method of selecting a pitch lag value for a portion of a speech signal, the method comprising:
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computing a correlation function of the portion of the speech signal for each of two or more ranges of delay times; identifying a candidate pitch lag value in each of the two or more ranges of delay times based on a delay time from the range of delay times that maximizes each correlation function; and selecting the pitch lag value from among the candidate pitch lag values based on a weighting of the two or more ranges of delay times.
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Specification