US Patent 7778516 Identifying, recording and reproducing information

A signal processing system comprises a recorder (500,204) for recording information signals representing video audio and/or data material on a tape (502, 126). The recorder (500, 204) generates (152,178) first material identifiers for identifying respective pieces of material on the medium such that each piece is differentiated from other pieces on the medium, and generates second, universally unique, identifiers for pieces of material, the second identifiers being associated with the first identifiers.