Image memory device

摘要

An image memory device wherein data necessary for interpolation is read out simply and successively from a frame memory at a time without requiring a complicated timing control circuit to allow interpolation processing to be performed at a high speed. Image data are temporarily stored into a plurality of parallel frame memories having an interleave construction. Conversion addresses for the frame memories are generated based on different conversion rules from a plurality of address decoders and applied in parallel at a time to the frame memories so that data at neighboring points of a coordinate position for an object of interpolation are outputted at a time from the frame memories. The neighboring point data are inputted in parallel at a time, or pipeline inputted, to an interpolation calculation circuit so that coefficients are generated from individual pipelines. Product sum calculation is performed for the coefficients and the neighboring point data.