Definition 7. A multimedia tool box of type 1 (mtb1) is some black box (ready made) tool box for processing the multimedia data of `any` type, with the property that the performance is optimized with respect to Quality of Service (QoS); which is denoted by the processing time here.

Definition 8. A multimedia tool box of type 2 (mtb2) is some black box (ready made) tool box for processing the multimedia data of `any` type, with the property that the performance is optimized with respect to Quality of Data (QoD); which is denoted by the quality of the multimedia objects that belongs to the output stream.