Facsimile and static presentation processing – Facsimile – Specific signal processing circuitry
Patent
1978-12-26
1980-10-14
Martin, John C.
Facsimile and static presentation processing
Facsimile
Specific signal processing circuitry
358167, 358111, 250416TV, H04N 514, H04N 521, H04N 532
Patent
active
042284651
ABSTRACT:
In a convolver, analog video waveforms for each horizontal line to a raster scanned video monitor are sampled at regular intervals with a high speed shift register such as a charge coupled device to obtain trains of picture elements (pixels) which are transferred line-after-line to a series of registers to thereby delay the lines by the number of register stages used. As the trains are transferred the pixels are simultaneously supplied to delay elements to delay corresponding pixels in each line by a given amount in reference to the individual pixel which is to be convolved at the instant. The delayed pixel signals existing at the instant are variously processed in summing devices and the result is used to act on the individual pixel to convolve it in accordance with the filter function which is desired.
REFERENCES:
patent: 3936800 (1976-02-01), Ejiri et al.
patent: 3991322 (1976-11-01), Rush et al.
patent: 4074231 (1978-02-01), Yojima
patent: 4127873 (1978-11-01), Katagi
Deeley et al., "Improved Digital Aperture Corrector," Proceedings of the IEEE, vol. 121, No. 9, pp. 929-934, Sep. 1974.
Lambert Thomas W.
Stone Barry N.
General Electric Company
Hohenfeldt Ralph G.
Martin John C.
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