Digital signal processing apparatus, digital signal...

Details Digital signal processing apparatus, digital signal... Digital signal processing apparatus, digital signal...

2002-02-28

2010-11-02

Augustin, Evens J (Department: 3621)

Data processing: financial, business practice, management, or co

Business processing using cryptography

Usage protection of distributed data files

C705S057000

Reexamination Certificate

active

07827112

ABSTRACT:
A digital signal processing apparatus, a digital signal processing method, an information center, and a data delivery system are capable of judging reliably whether digital signals such as music data signals recorded on a storage medium have been legally purchased by a customer from a legitimate vendor, so that only when the digital signals are judged to be legitimately purchased data, will a new service be offered to the customer.

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