Sound processing method, sound processor, and...

Details Sound processing method, sound processor, and... Sound processing method, sound processor, and...

G - Physics

11

B

G11B 20/10 (2006.01) G11B 27/00 (2006.01)

Patent

CA 2271463

When sound signals are reproduced at a speed different from a speed at a time of recording, the sound data are divided into unit blocks in accordance with the variable speed ratio (r) of a variable speed reproducing unit (2) of a VTR and the attributes of the sound and successively interpolated or thinned out while matching the sampling frequency fi (Hz) at the time of A/D conversion and the sampling frequency f0 (Hz) at the time of D/A conversion with each other by a sampling frequency converter (4). Thus high quality sound whose pitch is not varied is outputted while synchronizing the presented timing of the sound with the picture signals which are reproduced at a variable speed by the variable speed reproducing unit (2).

Lorsque l'on reproduit des signaux sonores selon une vitesse différente de la vitesse d'enregistrement, les données sonores sont divisées en blocs unitaires, en fonction du rapport de vitesse variable (r) de l'unité de reproduction à vitesse variable (2) d'un magnétoscope (VTR), les effets sonores étant successivement interpolés ou affinés, un convertisseur de fréquence d'échantillonnage (4) permettant de faire correspondre la cadence d'échantillonnage f¿i? (Hz) au moment de la conversion analogique-numérique à la cadence d'échantillonnage f¿0? (Hz) au moment de la conversion numérique-analogique. On produit ainsi un son haute qualité, dont le pas est stable, tout en synchronisant le son et les signaux-images reproduits selon une vitesse variable au moyen de ladite unité de reproduction à vitesse variable (2).

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