Patent ID: 7315685

Claim:
A method for authenticating a disk containing digital video signals recorded onto a fresh disk by a disk recorder, said disk recorder comprising a disk feeder, a recording tray, a recording compartment, a code generator, a code printer and a code mixer, the method comprising the steps of: a. feeding said fresh disk from a fresh disk compartment of said disk feeder to said recording tray; b. generating an exclusive code and a corresponding code signal for said fresh disk by said code generator, said exclusive code including data identifying the data source of the digital video signal recorded on the disk; c. feeding siad exclusive code to said printer and said code signal to said mixer; d. aligning said fresh disk with said printer and imprinting said exclusive code onto a label side of said fresh disk, said label side being the surface opposite a surface used for the recording of said video signal; e. feeding said fresh disk imprinted with said exclusive code to said recording compartment; and f. mixing said code signal with said digital video signal by said code mixer and recording a mixed signal onto said disk imprinted with said exclusive code.