Pitch lag estimation

Details Pitch lag estimation Pitch lag estimation

G - Physics

10

L

G10L 11/04 (2006.01)

Patent

CA 2673492

Autocorrelation values are determined as a basis for an estimation of a pitch lag in a segment of an audio signal. A first considered delay range for the autocorrelation computations is divided into a first set of sections, and first autocorrelation values are determined for delays in a plurality of sections of this first set of sections. A second considered delay range for the autocorrelation computations is divided into a second set of sections such that sections of the first set and sections of the second set are overlapping. Second autocorrelation values are determined for delays in a plurality of sections of this second set of sections.

Dans cette invention, des valeurs d'autocorrélation sont déterminées sur la base d'une estimation d'un retard de son dans un segment d'un signal audio. Une première plage de retard considérée pour les calculs d'autocorrélation est divisée en un premier ensemble de sections, et des premières valeurs d'autocorrélation sont déterminées pour des retards dans une pluralité de sections de ce premier ensemble de sections. Une seconde plage de retard considérée pour les calculs d'autocorrélation est divisée en un second ensemble de sections, de telle sorte que les sections du premier ensemble et les sections du second ensemble se chevauchent. De secondes valeurs d'autocorrélation sont déterminées pour des retards dans une pluralité de sections de ce second ensemble de sections.

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