Combined image producing apparatus

Details Combined image producing apparatus Combined image producing apparatus

1992-07-20

1993-09-07

Groody, James J.

Facsimile and static presentation processing

Facsimile

Specific signal processing circuitry

358 22, 358167, 358 36, H04N 5265

Patent

active

052434290

ABSTRACT:
While a main video signal is selectively replaced by a sub-video signal during the periods when the sub-video signal, typically its luminance signal, is larger than a first predetermined value, the sub-video signal is clamped at a second predetermined value that is smaller than the first predetermined value when the line non-correlation or field non-correlation is detected in the sub-video signal.

REFERENCES:
patent: 2244239 (1941-06-01), Blumlein et al.
patent: 3444380 (1969-05-01), Webb
patent: 3678182 (1974-05-01), Boxman et al.
patent: 4356512 (1982-10-01), Robers
patent: 4506382 (1985-03-01), Hada et al.
patent: 4703342 (1987-10-01), Takahashi
patent: 4811104 (1989-03-01), Kawabe
Parr, E. A., "Video Effects Unit", Television, Jan. 1977, vol. 27, No. 3, pp. 158-160.
Hathaway et al., "Video Inset System", Electronics, pp. 150-153, Apr. 1953.
Bassetti et al., "Narrow Line Detection for a Flying Spot Scanner", IBM Technical Disclosure Bulletin, vol. 23, No. 2, Jul. 1980.

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