Two-dimensional memory access in image processing systems

Abstract

A two-dimensional direct memory access system that maximizes processing resources in image processing systems. The present invention includes a two-dimensional direct memory access machine. Also, it employs a ping-pong style memory buffer to assist in the transfer and management of data. In certain applications of the invention, the type of data used by the invention is image data. The two-dimensional direct memory access machine transfers a specific cross sectional area of the image data to a processor. The efficient method of providing the processor only with the specific cross sectional area of the image data that is to be processed at a given time provides decreased processing time and a better utilization of processing resources within the two-dimensional direct memory access system. The present invention may be contained in a variety of image processing systems operating as either a peripheral or a stand alone device including but not limited to color photo-copy machines, color facsimiles, color printers, black and white printers, digital cameras, and digital printers. In certain embodiments, the two-dimensional direct memory access system exchanges image data between random access memory and a digital signal processor using the two-dimensional direct memory access machine and the ping-pong style memory buffer.

Dependencies are inferred from the claim text.