G - Physics – 10 – L
Patent
G - Physics
10
L
G10L 21/02 (2006.01)
Patent
CA 2555182
The invention relates to a method of synthesizing a mono audio signal based on an available encoded multichannel audio signal. The encoded multichannel audio signal is assumed to comprise at least for a part of an audio frequency band separate parameter values for each channel of the multichannel audio signal. In order to reduce the processing load in synthesizing the mono audio signal, it is proposed that the parameter values of the multiple channels are combined at least for a part of an audio frequency band in the parameter domain. The combined parameter values are then used for synthesizing the mono audio signal. The invention relates equally to a corresponding audio decoder, to a corresponding coding system and to a corresponding software program product.
L'invention concerne un procédé permettant de synthétiser un signal audio monophonique sur la base d'un signal audio multicanal codé disponible. Ledit signal audio multicanal codé est censé comprendre au moins en partie une bande de fréquence audio des valeurs de paramètres séparées pour chaque canal dudit signal audio multicanal. Afin de réduire la charge de traitement lors de la synthèse du signal audio monophonique, il est proposé que les valeurs de paramètres des multiples canaux soient combinées au moins en partie d'une bande de fréquence audio dans le domaine des paramètres. Les valeurs de paramètres combinées servent alors à synthétiser le signal audio monophonique. L'invention concerne également un décodeur audio, un système de codage et un produit de programme de logiciel correspondants.
Lakaniemi Ari
Ojala Pasi
Nokia Corporation
Sim & Mcburney
LandOfFree
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