Patent ID: 9584576
Date: 2017-02-28
CPC Classifications: H03M,H04L,H04N

Claim:
1. A method, performed by a microprocessor and a memory, for lossless data coding applied by a piece of transmitter equipment, in bidirectional communication with at least one piece of receiver equipment in a collaborative session of exchange of multimedia contents, which reduces a volume of data compared to a conventional approach, the method comprising: exchanging with the at least one piece of receiver equipment, during the collaborative session, at least one attribute of a collaboration message which may be used in the collaborative session and an index associated with the at least one attribute, the at least one attribute and the index being used by the piece of transmitter equipment and by the at least one piece of receiver equipment for updating a shared dictionary of indexed attributes, the shared dictionary being stored in memory by both the piece of transmitter equipment and the at least one piece of receiver equipment for the entire duration of the collaborative session; substituting, in a collaboration message intended to be sent to the at least one piece of receiver equipment, the at least one attribute with the index in the shared dictionary, wherein the size of the at least one attribute is greater than the size of the index in the shared dictionary; sending the collaboration message to the at least one piece of receiver equipment; and destroying the shared dictionary at the end of the collaborative session.