SPRUIE9D May 2017 – May 2024 DRA74P , DRA75P , DRA76P , DRA77P
The vertical scaler has a polyphase (32-phase × 5-tap) filter and a running average filter as shown in Figure 12-23. While the polyphase filter can be used for any up-scaling and preferably downscaling to 3/16 scale factor, the running average filter is used only for downscaling to a ½ or less size. Selection between these two scalers is based on the user setting of VPE_CFG_SC0[4] CFG_USE_RAV parameter (CFG_USE_RAV= '0' for poliphase filter, and CFG_USE_RAV= '1' for running average filter), according to the user preference of the tradeoff between sharpness preserving and introduced artifacts.