A method begins by a dispersed storage (DS) processing module receiving a first coded matrix that includes a first plurality of pairs of coded values corresponding to first data segments of a first data stream and a second data stream. The method continues with the DS processing module receiving a second coded matrix that includes a second plurality of pairs of coded values corresponding to first data segments of a third data stream and a fourth data stream. The method continues with the DS processing module generating a new coded matrix to include a plurality of groups of selected coded values. The method continues with the DS processing module outputting the plurality of groups of selected coded values to a requesting entity in a manner to maintain time alignment of the first data segments of the first, second, third, and fourth data streams.