Thomson Licensing

Thomson-csf

Thomson Broadcast Systems

Gvbb Holdings S.a.r.l

Patrick Hardy

Stephane Hergault

Bruno Derrien

Olivier Marlec

Hubert Prioul

Bertrand Provost

Thierry Tapie

Serge Defrance

Jean Le Roux

Gael Mace

Claude Claverie

Stephans Hergault

The present invention relates to a communication device comprising switching means in a packet switched networks, preferably in professional video production and broadcast environments. The present invention more particularly concerns a communication device in a packet-switched communication network, comprising means for: The present invention also concerns a method of switching in a packet-switched communication network comprising a plurality of sources of data, a communication device and at least one destination device.

Virtual multimedia matrix over packet switched network

The invention relates to the field of the synchronization of data delivery onto equipments connected over a packet switching network, in particular when the equipments are devoted to video and audio data or Auxiliary data linked to processing and are connected over a local area network for forming a video/audio production studio. More precisely the invention concerns a data inserter device for inserting a timestamp in packets, and a delay compensating device for extracting said timestamp and compensating the delivery delay and in particular the jitter, the network delay and the packet generation duration or any additional user delay.

Precise compensation of video propagation duration

The present invention relates to the synchronizing of equipment, and more precisely to the transporting of synchronization signals via a communication network with a view to inter-synchronizing the equipment. The invention concerns a reference station able to deliver packets in a packet switching network to communication devices connected to the network. According to the invention, the reference station comprises means for inserting at least a temporal offset in said packets, wherein said temporal offset describes data delivery duration on a pre-determined path of said network. The invention relates also to a sending communication device and to a receiving communication device.

Delivery delay compensation on synchronised communication devices in a packet switching network

The present invention relates to a device able to receive packets circulating in a packet-switching network. The packets include information on a synchronization signal. The device is configured for producing first and second pulses synchronous with the synchronization signal. The first and second pulses have different periods, which are integer value multiples of the synchronization signal period.

Device to synchronize audio and video pulses in a receiver

Non-linearity estimation method and device

Optical emission head with laser and modulator

An amplification circuit comprising a device for compensating for its input current. The amplification circuit includes an amplifier and a capacitor located on the input side of the amplifier. The input-current compensation device consists of a current generator, generating a current Ig, a switch and a device for measuring the average current charging or discharging the capacitor during the time that the switch is open. The current Ig is such that: Average current=Ia-Ig, where Ia is the input current of the amplifier. The value of the average current is close to zero. The value of the current Ig which the current generator must output, so as to make the average current close to zero, is calculated using the device for measuring the average current. The invention particularly applies to a circuit for restoring the DC component of a video signal.

Amplification circuit which includes an input-current compensation device

Automatic gain control method and device for receiving circuits

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Baulon, France

Patrick Hardy