Copy protection by inserting a phase-shifted color burst signal

Details Copy protection by inserting a phase-shifted color burst signal Copy protection by inserting a phase-shifted color burst signal

1996-10-18

2000-03-21

Tran, Thai

Motion video signal processing for recording or reproducing

Local trick play processing

With randomly accessible medium

386 94, 380 5, H04N 576

Patent

active

060411589

ABSTRACT:
An analog color video signal is prevented from being satisfactorily copied by inserting a phase-shifted color burst signal of predetermined duration into a predetermined location of the usual burst interval of that analog color video signal. The predetermined location may precede the normal color burst signal, or it may follow the normal color burst signal or it may be located in the middle of the burst interval.

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patent: 4825299 (1989-04-01), Okada et al.
patent: 5251041 (1993-10-01), Young et al.
patent: 5315448 (1994-05-01), Ryan
patent: 5510900 (1996-04-01), Shirochi et al.
patent: 5579120 (1996-11-01), Oguro
patent: 5784523 (1998-07-01), Quan et al.

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