Device and method for generating an ambience signal

G - Physics – 10 – L

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G10L 19/02 (2006.01) H04S 5/00 (2006.01)

Patent

CA 2643862

In order to produce a surrounding-area signal which is suitable for transmission via loudspeakers which do not have their own loudspeaker signal, that is to say for example for surround channels, a transient detector (11) is provided in order to detect a transient time period. A synthesis signal generator (12) produces a synthesis signal which on the one hand satisfies the transient condition and on the other hand satisfies the continuity condition for the synthesis signal. A signal substitutor (14) then replaces a section of the investigation signal by the synthesis signal, in order to obtain a surrounding-area signal for the surround channels.

La présente invention concerne un détecteur de transitoires (11) destiné à détecter une période transitoire pour la génération d'un signal d'ambiance qui est approprié pour la diffusion par des haut-parleurs pour lesquels aucun signal propre de haut-parleurs n'existe, donc par exemple pour des canaux surround. Un générateur de signaux de synthèse (12) génère un signal de synthèse qui remplit d'une part la condition transitoire et d'autre part la condition de continuité pour le signal de synthèse. Un substituteur de signaux (14) remplace alors une section du signal d'examen par le signal de synthèse pour obtenir un signal d'ambiance pour les canaux surround.

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