FIELD: physics.
SUBSTANCE: autocorrelation values are defined as a basis for estimating the period of the fundamental tone in an audio signal segment. The first analysed delay range for autocorrelation calculations is divided into a first set of sections, and first autocorrelation values are determined for delays in multiple sections of that first set of sections. The second analysed delay range for autocorrelation calculations is divided into a second set of sections such that sections of the first set and sections of the second set overlap. Second autocorrelation values are determined for delays in multiple sections of that second set of sections.
EFFECT: efficient estimation of the fundamental tone of an audio signal.
31 cl, 6 dwg
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