Apparatus and method for processing a high definition video sign

Details Apparatus and method for processing a high definition video sign Apparatus and method for processing a high definition video sign

1996-03-28

1998-07-07

Buczinski, Stephen C.

Cryptography

Cryptanalysis

360 60, 386 37, 386 94, 386123, 386124, H04N 7167, H04N 591, H04N 584

Patent

active

057780641

ABSTRACT:
Digital video tape recorder which reproduces from a record medium a digital high definition video signal having copy-prevention data therein, extracts the copy-prevention data from the reproduced signal, generates from the extracted digital copy-prevention data an analog copy-inhibit signal that has the same data format as a copy-inhibit signal superimposed on a standard definition video signal, converts the reproduced digital high definition video signal to an analog signal, and superimposes the analog copy-inhibit signal onto the analog signal for output. To record a high definition video signal, the digital video tape recorder receives an analog high definition video signal that has superimposed thereon a copy-inhibit signal having the same data format as a copy-inhibit signal superimposed on a standard definition video signal, extracts the copy-inhibit signal from the received analog high definition video signal, supplies the received analog high definition video signal when that signal is not copy-protected, converts the supplied video signal to a digital signal, generates digital copy-prevention data from the extracted copy-inhibit signal, adds the digital copy-prevention data to the digital signal, and records on a record medium the digital signal with the digital copy-prevention data added thereto.

REFERENCES:
patent: 4297729 (1981-10-01), Steynor et al.
patent: 5535275 (1996-07-01), Sugisaki et al.
patent: 5574787 (1996-11-01), Ryan

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