Facsimile and static presentation processing – Facsimile – Specific signal processing circuitry
Patent
1994-09-29
1996-09-17
Coles, Sr., Edward L.
Facsimile and static presentation processing
Facsimile
Specific signal processing circuitry
348489, 348717, H04N 140, H04N 1104
Patent
active
055574262
ABSTRACT:
An image information signal processing apparatus for processing a first image information signal having at least a first image signal and a second image signal which is different from the first image signal, and a second image information signal having a third image signal with a frequency band wider than that of the first image signal or the second image signal. When the first image information signal is input, the apparatus forms first image data corresponding to the first image signal and second image data corresponding to the second image signal by performing sampling of the first image information signal in accordance with a first sampling signal having a first sampling frequency. When the second image information signal is input, the apparatus forms third image data corresponding to the third image signal by performing sampling of the second image information signal in accordance with a second sampling signal whose frequency is higher than that of the first sampling signal. When storing the second image information signal, the apparatus alternately supplies the third image data to a first storage circuit capable of storing one picture plane portion of the first image data and to a second storage circuit capable of storing one picture plane portion of the second image data, each for a predetermined period. Thus, the apparatus makes it possible, with a simple construction, to store image information signals of different frequency bands without involving deterioration in picture quality.
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patent: 4698665 (1987-10-01), de Haan
Canon Kabushiki Kaisha
Coles Sr. Edward L.
Lee Thomas D.
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