. "Thus the result of bridging two media streams A & B is the following sequence: { 2 2 ( a 1 + b 1 ) , 2 2 ( a 2 + b 2 ) , 2 2 ( a 3 + b 3 ) ??? } FIGS. 9 a and 9 b are a flow diagram showing the principal operations carried out in the system of FIG. 3." . . .