Thomson Licensing

Thomson Licensing S.a.

Jean-Charles Guillemot

Claude Chapel

Thierry Tapie

Jean Le Roux

Olivier Marlec

Serge Defrance

Franck Abelard

Ingrid Autier

The invention concerns a communication device including several external data sources, at least a local area network connecting peripherals, means enabling to establish connections between the local area network and the external data sources, means for controlling the incoming data from the external sources and for sending them to the local area network in order to reduce the bandwidth occupation on the local area network. The device also includes means for updating signalization tables included in the incoming data and means for inserting the modified signalization tables in the transport stream sent to the local area network. It is applicable to IEEE 1394 networks.

Incremental modular home gateway

A device is coupled to a first network and a second network and comprises a first storage element and a second storage element. The device stores data packets originating from the first network in the first storage element and stores data packets destined for the second network in the second storage element. In particular, the device slaves the writing of a data packet intended for the second network into the second storage element to the reading of the data packet from the first storage element so that the transfer time inside the device is constant for all the data packets.

Method and device for transferring data packets

The process is characterized in that it comprises: Application to the storage of MPEG data.

Method and device for reading MPEG recorded data transmitted on an IEEE 1394 bus

The invention concerns a method comprising a step which consists in comparing a label to a value counted from a transfer clock to define the transfer time on the bus of a packet read on a recording medium. The invention is characterized in that for implementing a special mode or trick mode, it further comprises the following steps: calculating a difference between two consecutive packets based on the values of recorded labels; calculating an offset value based on said difference and parameters received on the bus defining the special mode; adding said offset value to the label value of the transmitted packet to obtain a new label value defining the transfer time on the bus of the following packet to be transmitted. The invention is applicable to the storage of MPEG data.

Method and device for video data transmission for implementing special modes

A process for transmitting data in a network adapted for isochronous and asynchronous transmissions and comprising a sender and at least one receiver. The process comprises the steps of: The invention also provides a process for receiving data comprising the steps of error detection hereinabove, from the point of view of a receiver, as well as a sending process comprising the steps of dispatching the start of transmission indicator packets and awaiting acknowledgement of receipt indicator packets, from the point of view of a sender.

Data transmission method

A process for synchronizing an MPEG decoder, characterized by the process of calculating an actual instant of presentation Tpres of the video of an image, this instant relating to a local clock LSTC, further calculating an offset STOC between Tpres, being the calculated instant of presentation and the PTS label corresponding to the instant of presentation desired by the coder for the video of this image, so as to define a virtual clock VSTC=STCO+LSTC, the presentation of the video corresponding to this image being made at the PTS dates relating to the virtual clock VSTC, wherein this process relates to satellite decoders, MPEG decoders, as well, as digital TV receivers, utilizing a hard disk for recording coded data.

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Thorigne Fouillard, France

Jean-Charles Guillemot