Robert Boschgmbh

Nxp B.v.

Jochem Bonarius

Marc Smaak

Gert-Jan Koolen

Hans Van Der Schaar

Kees Janse

Victor Zwanenberg

Rene Derkx

Janse Kees

Conference systems are often installed in plenary halls and comprise a plurality of microphones for participants of a discussion, whereby the speech signals of the participants are received by the microphones, amplified by the conference system and distributed to the other participants of the discussion. An audio stream arrangement () is proposed comprising: a plurality of audio devices (), whereby each audio device () is adapted to provide an audio stream and whereby each audio device () comprises an audio device network interface () for transmitting its audio stream over a network (), a control device (), whereby the control device () is adapted to send a command over the network () to any of the audio devices () to set the audio device () in an active state, whereby the audio device () in the active state transmits its audio stream over the network (), a processing device () for processing the audio streams from the active audio devices (), whereby the processing device () comprises a processing device network interface () for receiving the audio streams from the network () and a mixing unit () with a plurality of input channels () and an output channel (), whereby each input channel () can be assigned to a audio stream from one active audio device () and whereby the mixing unit () is operable to mix the audio streams from the plurality of input channels () into a common audio stream and to output the common audio stream to the output channel (), whereby the audio streams from the active audio devices () to the processing device are transmitted by a multicast transmission.

Audio stream arrangement

Conference systems are used for example in discussions and usually comprise a plurality of delegate units with microphones, whereby in a discussion each discussion participant uses his own delegate unit. Usually the delegate units have a switch or the like, that allows the participant in front of the delegate unit to request, that his microphone is activated, so that the speech of the participant is input in the conference system and amplified by the conference system. A conference system comprising () a plurality of delegate units (), each delegate unit () having a microphone () for receiving an audio signal from a surrounding, a central service module () handling a plurality of contribution channels, whereby the audio output of the contribution channels contribute to an amplified audio output of the conference system () is proposed, whereby each delegate unit () is adapted to send a request for a contribution channel commit to the central service module (), whereby the central service module () is adapted to grant the request and to allocate a contribution channel to the requesting delegate unit (), thus setting the requesting delegate unit i in an active state A, whereby the delegate unit () is adapted to trigger the request by voice activation, whereby the request is triggered in case at least a first trigger condition is fulfilled defining that the audio signal level of one of the delegate units () as a possible requesting delegate unit i is higher than an individual test value for each other delegate unit () in the active state A, whereby the individual test value is an estimated audio signal level of the possible requesting unit i resulting from an audio or speech signal provided to the other active delegate units ().

Conference system and process for voice activation in the conference system

A circuit for connecting to a dimmer, the circuit configured to receive an input signal from the dimmer. The circuit comprises a first load and a switch. The switch is operable to automatically engage the first load at a predetermined time from a zero-crossing of the input signal and automatically disengage the first load at other times.

Circuit for connecting a low current lighting circuit to a dimmer

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Eindhoven, Netherlands

Jochem Bonarius