Circuit for displaying characters on limited bandwidth, raster s

Details Circuit for displaying characters on limited bandwidth, raster s Circuit for displaying characters on limited bandwidth, raster s

1978-05-24

1980-07-08

Curtis, Marshall M.

Communications: electrical

Land vehicle alarms or indicators

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

340744, 340742, 340793, 340728, G06F 314

Patent

active

042120080

ABSTRACT:
A 2-level quantized video signal, composed of background level and character-pattern delineating level time intervals in which transitions between levels only occur at an end of one or more elemental timing periods, is modified to a 3-level quantized video-signal in which the difference between the character-pattern delineating and background levels is increased for at least one of the first and last entire elemental timing periods of the duration of each occurring character-pattern delineating level interval.

REFERENCES:
patent: 3345458 (1967-10-01), Cole et al.
patent: 3573789 (1971-04-01), Sharp et al.
patent: 3781849 (1973-12-01), Baron et al.
patent: 3878536 (1975-04-01), Gilliam
patent: 3969716 (1976-07-01), Roberts
patent: 4040088 (1977-08-01), Hannan
patent: 4053878 (1977-10-01), Cannon

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