Patent ID: 7420935
Filing Date: 2008-09-02
Classification: H04M

Abstract:
1. A method of controlling a conference call in a system which comprises a conference bridge for combining several audio signals arriving from terminals and transmitting the combined signal further to at least one of said terminals using at least one transmitting codec, the conference bridge comprising a spatialization unit for creating a spatial effect, the method comprising determining the number of substantially simultaneously active pre-determined audio components, such as speech signals, from the audio signals of said conference bridge inputs, selecting, from a group of codecs comprising at least two different codecs, at least one transmitting codec for use on the basis of said number of simultaneously active pre-determined audio components, transmitting said combined signal encoded by a low bit rate audio codec to said at least one terminal in response to the fact that there is only one simultaneously active pre-determined audio component; or transmitting said combined signal encoded by a high bit rate audio codec to said at least one terminal in response to the fact that there is more than one simultaneously active pre-determined audio component.