Abstract: Disclosed is a system for high speed conversion of radar formats from polar coordinates to cartesian coordinates. From an initial address X.sub.i Y.sub.i where a radar pulse crosses a display, subsequent addresses are determined by adding constant values sin .theta..sub.i and cos .theta..sub.i to X.sub.i and Y.sub.i. This is faster than the prior method of calculating x.sub.i and Y.sub.i by multiplying R.sub.i (range) by sin .theta..sub.i and cos .theta..sub.i. Also disclosed is a system for filling the display between adjacent radials at long ranges where spoking of the display tends to occur. This is done by adding constant increments to one cartesian value on one vector until the next vector is reached while maintaining the other cartesian value constant.

Abstract: Disclosed is a cell to word buffer for use in a digital TV display radar system in which radar pulse returns are digitized by an analog to digital converter to form pixel data, polar coordinates of the pulse returns are converted to their equivalent X, Y cartesian coordinates by a coordinate converter and the pixel data are stored in an X, Y refresh memory array in accordance with their X, Y coordinates for use in refreshing a TV display. The cell to word buffer allows large offsets in high resolution radar scan converters. The cell to word buffer memory means is located intermediate the coordinate converter and refresh memory for temporarily storing, for each Y location, a plurality of groups of adjacent pixel data and their associated X addresses and for transferring each group of pixel data to its appropriate location in the refresh memory when each group in the buffer memory is filled with pixel data.