Aspect ratio and scan converter system

Details Aspect ratio and scan converter system Aspect ratio and scan converter system

1977-03-31

1978-11-14

Griffin, Robert L.

Facsimile and static presentation processing

Facsimile

Specific signal processing circuitry

343 5SC, 358 87, 358212, H04N 502

Patent

active

041258622

ABSTRACT:
An aspect ratio and scan converter system adapts signal information derived rom optical scanning of a rectangular field of view having an aspect ratio of the order of 60 to 1. The signal information is converted to digital form and serially stored in a bulk storage memory which may be addressed for reading out selected sequences of the serially stored digital signals. The selected sequences are stored in a random access memory having a two dimensional format and then read out by repetitive scan in a direction orthogonally related to the direction in which the sequences were stored. The digital signals thus read out are converted to analog form and applied to a suitable display means such as a TV type monitor CRT, providing a visual display of the selected portion of the elongate field of view.

REFERENCES:
patent: 3542948 (1970-11-01), Wolff
patent: 3810174 (1974-05-01), Heard et al.
patent: 3964064 (1976-06-01), Brandao et al.
patent: 4002827 (1977-01-01), Neuin et al.
patent: 4013832 (1977-03-01), Douglas
patent: 4025950 (1977-05-01), Matsumoto et al.
patent: 4058835 (1977-11-01), Kennedy

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