5.2.6.13 Unified Scaling Engine

The High-End Overlay (HEO) data path includes a multi-mode hardware scaler that allows an image resize in both the horizontal and the vertical directions. It performs chroma upsampling for YCbCr 4:2:2 and YCbCr 4:2:0 formats, and also rescales the alpha channel. It integrates a two-tap or four-tap filter architecture with programmable polyphase coefficients or fixed bilinear interpolation coefficients.