Patent ID: 8520821

Claim:
A system, comprising: a first host associated with a presenter, which in operation, runs an application or presents a material; a first voice audio engine running on the first host, which in operation, accepts a first conference audio stream and transmits either a presenter audio stream from the presenter or a computer audio stream of the application or material to a conference call; a sound mixing component running on the first host, which in operation, accepts and provides a mix of the first conference audio stream and the computer audio stream of the application or material to a switch engine; the switch engine running on the first host, which in operation, accepts as its two audio inputs the presenter audio stream captured from a microphone associated with the presenter and the mix of the first conference audio stream and the computer audio stream captured from the sound mixing component; wherein the switch engine selects and outputs only one of the two audio inputs as its audio output to the first voice audio engine upon a triggering signal; a second host associated with a viewer; and a second voice audio engine running on the second host, which in operation, enables the viewer to listen to the computer audio stream and/or a second conference audio stream including the presenter audio stream and to speak a viewer audio stream at the conference call and transmits the viewer audio stream to the conference call.