Digital signal processing apparatus, digital signal processing method, information center, and data delivery system
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United States of America Patent
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Nov 2, 2010
Issued Date -
N/A
app pub date -
Feb 28, 2002
filing date -
Mar 1, 2001
priority date (Note) -
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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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