Frame based audio transmission/storage with overlap to...

G - Physics – 11 – B

Patent

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G11B 27/038 (2006.01) G06F 3/06 (2006.01) G10H 7/00 (2006.01) G11B 20/24 (2006.01)

Patent

CA 2545240

Method for splicing PCM audio frames form modified frames by appending to each frame either a portion of the next preceding frame or the next following frame. According to a first approach, splices are obtained by fading up and fading down a frame end and a frame appendage only at a splice point, and overlapping and combining to provide a crossfade at the splice. Alternatively, every frame end and frame appendage is faded up and faded down, overlapped and combined. A subtractive method of providing complementary fade-up and fade- down reduces rounding errors.

La présente invention a trait à la jonction de trames audio MIC par l'ajout à chaque trame soit d'une portion de la trame immédiatement précédente ou de la trame immédiatement suivante. Selon une première technique, des montages sont obtenus par un fondu élévateur ou un fondu abaisseur d'une fin de trame et un ajout de trame uniquement à un point de jonction, et le chevauchement et la combinaison pour assurer un fondu enchaîné au niveau de la jonction. En variante, chaque fin de trame et ajout de trame est soumis à un fondu élévateur ou un fondu abaisseur, en chevauchement et en combinaison. Un procédé soustractif d'assurer un fondu élévateur et un fondu abaisseur complémentaires réduit les erreurs d'arrondi.

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