The GPU_OVERLAY IP Core (Figure 1) is a highly versatile on-screen display processor that allows high-quality anti-aliased bitmap graphics and text to be inserted over RGB video. The module supports a wide range of graphics effects and the programming interface is very simple to use. The bitmap overlay is partitioned into an array of tiles which are stored in a local tile buffer memory. There are four tile sizes available which are either: 8x16, 16x32, 32x64 or 64x128.