Facsimile and static presentation processing – Facsimile – Specific signal processing circuitry
Patent
1983-06-22
1988-01-19
Groody, James J.
Facsimile and static presentation processing
Facsimile
Specific signal processing circuitry
358283, 358167, 358 37, H04N 5208
Patent
active
047207450
ABSTRACT:
An NTSC composite color video signal is dematrixed and its RGB components are digitized so that each image or input frame is represented by a 512.times.512 pixel array. One high resolution output field is generated for each input frame by deriving a plurality of subpixel values for each input pixel. The subpixel values for a given pixel are derived by examining the nearest neighboring pixels and by utilizing enhancement algorithms represented by data in lookup tables. Signal to noise ratio improvement is achieved by comparing each given pixel value to the values of its neighboring pixels and then deciding whether or not to keep the given pixel value or to replace it with the median of it and its nearest neighbors. The subpixel values are fed through a digital to analog converter where the appropriate synchronization is added so that the analog outputs of the three branches of the device conform to the RS 343A format.
REFERENCES:
patent: 4184206 (1980-01-01), Harano
patent: 4258393 (1981-03-01), Ejiri et al.
patent: 4280144 (1981-07-01), Bacon
patent: 4282546 (1981-08-01), Reitmeier
patent: 4322750 (1982-03-01), Lord et al.
patent: 4360883 (1982-11-01), Ejiri et al.
patent: 4437122 (1984-03-01), Walsh et al.
patent: 4491875 (1985-01-01), Kawamura
patent: 4531160 (1985-07-01), Ehn
patent: 4547812 (1985-10-01), Waller et al.
D. R. Thompson, Digital Halftone Method for Matrix Displays, IBM Technical Disclosure Bulletin, Jun. 1977, pp. 235-238.
DeForest Sherman
Seegmiller S. Dale
DigiVision, Inc.
Faris E. Anne
Groody James J.
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