Recording graphic data of different transmission rates
AssigneeAlden Research Foundation
InventorsMalcolm F. Partridge, Frederick W. Simpkins, Lawrence A. Farrington
Life of this patent
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Abstract
Facsimile apparatus for line by line recording of different kinds of weather map, satellite and other graphic data distinguishes the different characteristics of the transmitted electrical data signals and records them in suitable aspect ratio, despite the fact that the various signals are transmitted at different line rates and are intended for recording at different line densities. The apparatus also enhances the contrast of the recording and can enlarge the original graphic information.
Claims16
Apparatus for recording different kinds of transmitted electrical signals on a moving web of predetermined width, each signal comprising a plurality of lines of information and constituting a frame of graphic information including a distinct characteristic identifying a suitable aspect ratio of the frame, different kinds of signals comprising lines occurring at different line rates, the apparatus comprising:
- means for receipt of the signals at their transmitted line rate and storage of the signals;
- means to read signals out of the storage means at a rate independent of the transmitted line rate;
- scan means coupled to the storage means and responsive to signals read out of the storage means to record successive lines on the web at a scan rate independent of the transmitted line rate;
- variable feed means for advancing the recording web relative to the scan means at one of a plurality of substantially different speeds;
- and
- means responsive to the transmitted signal for selecting the web feed speed dependent on the distinctive characteristic of the transmitted signal whereby signal groups of different line rates are recorded each in a suitable aspect ratio.
Dependencies are inferred from the claim text.