Video signal format converting circuit

Details Video signal format converting circuit Video signal format converting circuit

1997-04-08

1998-06-09

Cain, David C.

Cryptography

Particular algorithmic function encoding

Nbs/des algorithm

380 5, H04N 7167

Patent

active

057647640

ABSTRACT:
A video signal format converting circuit is disclosed, comprising a signal converting matrix circuit and a filter circuit that is constructed of a time delaying device for a video signal corresponding to a standard television format. When a digital video signal corresponding to a first video signal format is converted into a second video signal format that is different from the first video signal format and then output, the time delaying device of the filter circuit is used as a delaying circuit. The output signal of the delaying circuit or the video signal corresponding to the standard television signal format is selectively output. While or after the video signal corresponding to the first video signal format is converted into the video signal corresponding to the second signal format, the video signal is modified so as to protect it from being copied.

REFERENCES:
patent: 4642688 (1987-02-01), Lowry et al.
patent: 4691352 (1987-09-01), Arragon et al.
patent: 5553140 (1996-09-01), Kubota et al.
patent: 5657387 (1997-08-01), Mogi et al.

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