The invention relates to a method of processing a multimedia data stream coded according to a plurality of hierarchical levels and transmitted over a communication network with loss, the hierarchy levels being ordered so that a so-called higher hierarchy level is coded in a way that is dependent on at least one so-called lower hierarchy level, at least one portion of multimedia data of a lower hierarchy level having suffered losses, the method comprising a step (515) of error concealment in said at least one portion of data having suffered losses, characterized in that it comprises a processing step applied to the error concealment in said at least one portion of data of the lower hierarchy level and involving data of at least one higher hierarchy level dependent on the lower hierarchy level.