The On-Screen Display LogiCORE IP block provides alpha blending and compositing of multiple video streams/graphics layers. The core also includes internal simple text and graphics generation.
The Xilinx On-Screen Display LogiCORE™ IP provides for basic video overlay and blending functions for video systems. The core provides support for up to eight layers using a combination of external inputs (from frame buffer) and internal graphics controllers (including text generator and filled and outlined transparent boxes). The core is fully programmable including background color, layer position, size and z-plane order.