Abstract: The invention concerns a method of transferring at least one message for the establishment of a collaboration session (126) by a collaboration session manager (125) between a plurality of clients, characterised in that a messaging system (122) is associated with the collaboration session manager (125) and in that the method comprises the steps of the reception, by the messaging system associated with the collaboration session manager, of a message generated by a client of a collaboration session, the message comprising a plurality of addresses of clients of the collaboration session, of activation of a collaboration session by the collaboration session manager (125), of obtaining an address of the activated collaboration session and of transfer of at least one message intended for each collaboration session client address for establishing the collaboration session, the message comprising the address of the collaboration session activated. The invention also concerns an associated device and system.

Abstract: The present invention relates to a transmission system for services which are linked to relevant geographic zones. Said system comprises at least one set of transmitters (1,2,3,4) transmitting said services to said zones (11,12,13,14) and a receiver (100) filled with a receiver sub-assembly (110) to receive said services, further with a locating unit (130) determining the said receiver's geographic zone and a switching unit (140) switching said receiver sub-assembly (110) to receive the service(s) linked to the relevant zones corresponding to the geographic position determined by said locating unit (130). In the invention, said transmission system or each transmitter will transmit simultaneously the services linked to the relevant zones under its coverage and the descriptions of the relevant zones (11, 12, 13, 14), also the addresses of said services as well as the descriptions of the relevant zones (11, 12, 13, 14) and the addresses of the zones neighboring the zones under coverage.

Abstract: A coding system delivers a global data stream consisting of primary coded subband data streams from a primary subband coder bank, coding an input signal data stream, and secondary coded subband data streams from a secondary subband coder bank. The coding delay of the primary coder bank is smaller than that of the secondary coder bank. A filter bank receives the input signal data and generates signal streams in a plurality of subbands, which are coded by the respective coder of the primary subband coder bank, forming the primary streams. A bank of decoders receive and decode the respective coded primary subbank streams, which decoded subband signals are subtracted by a bank of subtractors from the corresponding original subband signals, which difference streams are input to the respective coder in a secondary subband coder bank. The secondary coder generates coded secondary subband data streams. A multiplexer interlaces the primary and the secondary coded subband data streams into a single global data stream.