Digital video copy protection system

Details Digital video copy protection system Digital video copy protection system

1997-06-24

2000-09-05

Chevalier, Robert

Motion video signal processing for recording or reproducing

Local trick play processing

With randomly accessible medium

360 60, H04N 5913

Patent

active

061155330

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: 5621840 (1997-04-01), Kawamura et al.
patent: 5627655 (1997-05-01), Okamoto et al.

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