The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Feb. 18, 1992
Filed:
May. 24, 1990
Richard J Gran, Farmingdale, NY (US);
Dennis W Berde, Melville, NY (US);
Hugo D Ritucci, North Merrick, NY (US);
Grumman Aerospace Corporation, Bethpage, NY (US);
Abstract
A two-dimensional fast Fourier transform converter utilizes parallel digital fast Fourier transform processors and a frame serial processing path to convert two-dimensional images of large pixel count (512.times.512 or higher) and high dynamic range (16 bits of pixel intensity quantization) at a rate equal to or exceeding real time processing rate of 30 frames/second. The parallel processors are organized for performing the row and column transformations in a highly parallel and efficient manner. In one embodiment, a uni-directional processing path with segmented image data busses to streamline the data movement is used. In a second embodiment, a bi-directional processing path is utilized such that the fast Fourier transform processors perform row and column conversions sequentially, thus reducing by a factor of two the number of individual fast Fourier transform processors required. The converter includes three port SRAM working memories, toggled DRAM image frame storage memories, and a data transfer and sequence controller.