Improved lost frame recovery techniques for parametric,...

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G10L 21/04 (2006.01) G10L 19/00 (2006.01) G10L 19/12 (2006.01) H03M 13/13 (2006.01) H04L 1/00 (2006.01) H04L 12/56 (2006.01)

Patent

CA 2332596

A lost frame recovery technique for LPC-based systems employs interpolation of parameters from previous and subsequent good frames, selective attenuation of frame energy when the energy of a subframe exceeds a threshold, and energy tapering in the presence of multiple successive lost frames.

La présente invention concerne une technique de récupération de trames perdues pour systèmes à codage prédictif linéaire faisant intervenir une interpolation de paramètres à partir de bonnes trames précédentes et suivantes, une atténuation sélective de l'énergie de trame lorsque l'énergie d'une sous-trame dépasse un seuil et une atténuation progressive de l'énergie en présence de multiples trames successives perdues.

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