Facsimile and static presentation processing – Facsimile – Specific signal processing circuitry
Patent
1991-11-27
1993-12-28
Coles, Sr., Edward L.
Facsimile and static presentation processing
Facsimile
Specific signal processing circuitry
345147, H04N 140
Patent
active
052744710
ABSTRACT:
An apparatus for converting a resolution and a gray scale of document image data, which includes a latch circuit for setting variable values of image control data, a resolution-converting clock generator for generating resolution-converting clock signals, a clock selector for selecting a pixel clock signal, a unit data detector for detecting byte detecting clock signal according to gray scale conversion as a unit data, an image data converter for gray scale conversion and binary codification of the image data, an image data selector for selecting the gray scale of the image data of the image data converter, and an image data output portion for outputting the image data with the selected gray scale in units of bytes. The image data processing can be performed at high speed, and the resolution and the gray scale control is carried out in the hardware, which allows the apparatus to be highly compatible and also to be widely adapted.
REFERENCES:
patent: 4847695 (1989-07-01), Arai
patent: 4870499 (1989-09-01), Suzuki et al.
patent: 5111194 (1992-05-01), Oneda
Coles Sr. Edward L.
Jackson Jill
Samsung Electronics Co,. Ltd.
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