Digital erase of raster lines

Details Digital erase of raster lines Digital erase of raster lines

1980-10-01

1982-11-23

Trafton, David L.

Communications: electrical

Land vehicle alarms or indicators

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

315 31TV, 315371, 340726, 340728, 358242, 358244, G09G 116

Patent

active

043608051

ABSTRACT:
The perception of raster lines on a television monitor is obscured by continuously and cyclically vertically shifting and presenting in successive frames the raster in successive upward positions and then in successive downward positions by incremental amounts, the total maximum vertical shift distance being less than the distance between original horizontal raster lines, thus giving the appearance of blending the information between original horizontal raster lines. Vertical raster deflection is accomplished by cyclically delaying the original, or normal, vertically sync pulses by amounts which incrementally increase to a maximum for producing a vertical frame rise less than the distance between original horizontal raster lines and decrementally decrease to no delay. A photographic camera capable of multiple frame exposure time is used to produce photographs of the video monitor without connections or operational dependence upon the television monitor system. An all-digital system provides increased reliability and repeatability as well as manufacturing and maintenance economies.

REFERENCES:
patent: 2548219 (1951-04-01), Jenkins
patent: 2681383 (1954-06-01), Loe
patent: 2908754 (1959-10-01), Purington et al.
patent: 3422223 (1969-01-01), Scipione
patent: 3535446 (1970-10-01), Hilburn
patent: 3571503 (1971-03-01), McMann
patent: 3634623 (1972-01-01), McMann
patent: 3814855 (1974-06-01), Kokado
patent: 3855496 (1974-12-01), Ciciora
patent: 4096530 (1978-06-01), Plugge et al.
Harold E. Ennes; Digitals In Broadcasting; Howard W. Sams & Co., Inc; 1977; pp. 245-247, 269-283.

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