Video field decoder

Details Video field decoder Video field decoder

1984-12-28

1987-04-28

Brigance, Gerald L.

Communications: electrical

Land vehicle alarms or indicators

Internal alarm or indicator responsive to a condition of the...

340721, 358152, G09G 114

Patent

active

046617981

ABSTRACT:
A video field decoder is provided in a raster scan interlaced video display system, which decoder provides an indication of whether the odd or even field is currently being displayed. The decoder circuit compares the horizontal and vertical sync signals and provides an output on their coincidence, indicating a given field level (odd or even) is being displayed.

REFERENCES:
patent: 4286264 (1981-08-01), Matherat
patent: 4297693 (1981-10-01), Parsons
patent: 4360805 (1982-11-01), Andrews et al.
patent: 4425581 (1984-01-01), Schweppe et al.
patent: 4437167 (1984-03-01), Demke et al.
patent: 4450442 (1984-05-01), Tanaka
patent: 4549611 (1986-07-01), Bowker et al.

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