An apparatus and method are provided. The apparatus comprises a plurality of inputs, a plurality of receive buffers, a processor and an output. The plurality of inputs are configured to receive a plurality of data streams. Each data stream comprising a respective plurality of data blocks carrying common content. The plurality of receive buffers are each configured to store the data blocks of a respective on of the plurality of data streams including storing quality information associated with each data block. The processor is configured to select stored data blocks from the respective buffers to form an output data stream carrying the common content. The processor is further configured to carry out signal processing on the selected data blocks in dependence on the associated quality information. The output is configured to output the selected and error concealed data blocks. The quality information associated with each data block corresponds to a quality experienced by a receive path at the time of reception of each data block.