Digital scan converter

Details Digital scan converter Digital scan converter

1978-08-15

1980-09-02

Britton, Howard W.

Facsimile and static presentation processing

Facsimile

Specific signal processing circuitry

343 5SC, H04N 502

Patent

active

042209692

ABSTRACT:
There is disclosed a visual scan converter which accepts digitalized video data in a polar coordinates system from a source such as a radar receiver, a sonar, or an ultrasonic imaging system, and converts the data format to make it suitable for presentation on a cathode ray tube in a standard television or other orthogonal raster at flicker free rates. The input data in a polar coordinates system is first stored in a digital memory, which is read with the orthogonal coordinates system. In reading said digital memory, an orthogonal address generated by a raster address generator is converted to a polar address, which is applier applied to said digital memory. An interpolation is performed for the outputs of the digital memory.

REFERENCES:
patent: 3653044 (1972-03-01), Breeze
patent: 3765018 (1973-10-01), Heard
patent: 4002827 (1977-01-01), Nevin
patent: 4065770 (1977-12-01), Berry
patent: 4106021 (1978-08-01), Katagi
patent: 4125862 (1978-11-01), Catano
patent: 4128838 (1978-12-01), Brands
patent: 4149252 (1979-04-01), Miller

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