Apparatus for identifying standard and non-standard video signal

Details Apparatus for identifying standard and non-standard video signal Apparatus for identifying standard and non-standard video signal

1991-05-10

1992-11-24

Groody, James J.

Facsimile and static presentation processing

Static presentation processing

Attribute control

358148, 358149, 358 19, 358 21R, H04N 944

Patent

active

051667819

ABSTRACT:
A source responsive to a composite video input signal provides line and burst frequency related timing signals. A measuring circuit responsive to the timing signals provides measurement values which tend to repeat when the video input signal is of a given color television standard and tend to exhibit a pseudo-random distribution otherwise. A histogram processor provides a histogram of the measurements occurring within a given time interval and provides an output signal identifying standard and non-standard video input signal based on the histogram of the measurements.

REFERENCES:
patent: 4635099 (1987-01-01), Nicholson et al.
patent: 4665437 (1987-05-01), Nicholson
patent: 4777522 (1988-10-01), Parish et al.
patent: 4785350 (1988-11-01), Beudick et al.
patent: 4821112 (1989-04-01), Sakamoto et al.
patent: 4860098 (1989-08-01), Murphy
patent: 4905083 (1990-02-01), Biegni et al.
patent: 5025310 (1991-06-01), Selioya et al.

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