Digital video copy protection system

Details Digital video copy protection system Digital video copy protection system

1996-08-29

1997-12-30

Hindi, Nabil

Dynamic information storage or retrieval

Duplication or copying

G11B 364

Patent

active

057038597

ABSTRACT:
A formatting apparatus authenticates an information signal prior to mass duplication of the signal by analyzing the signal to detect the presence or absence of a security signal therein, inserting a security signal into the information signal, and recording the modified signal only if no security signal was detected.

REFERENCES:
patent: 5453968 (1995-09-01), Veldhuis et al.
patent: 5535188 (1996-07-01), Dang et al.

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