How do I change the motion threshold for the Deinterlacer II MegaCore function (with Sobal based HQ mode)?

The number of motion threshold bits for the Deinterlacer II MegaCore® function can be modified manually by following these steps

- Locate the function’s source file in the synthesis/submodules directory. It will be named similar to: <my_deinterlacer_name>_alt_vip_cl_dil_0.v 

– Then find the instantiation of the motion detect block which will look like this:
  alt_vip_motion_detect #(
              .BITS_PER_SYMBOL              (8),
              .NUMBER_OF_COLOR_PLANES       (2),
              .COLOR_PLANES_ARE_IN_PARALLEL (1),
              .MAX_LINE_LENGTH              (1920),
              .KERNEL_SIZE_0                (4),
              .KERNEL_SIZE_1                (1),
              .KERNEL_SIZE_2                (2),
              .KERNEL_SIZE_3                (1),
              .MOTION_BPS               (7), // Try reducing to ~4
              .SRC_WIDTH                    (8),
              .DST_WIDTH                    (8),
              .CONTEXT_WIDTH                (8),
              .TASK_WIDTH                   (8),
              .SOURCE_ADDRESS               (0)
  )

- Change the “MOTION_BPS” parameter.  The MOTION_BPS parameter is used for motion detection as follows :

    if (MOTION_BPS > BITS_PER_SYMBOL)
        assign normalized_motion[i] = absdiff[i] << (MOTION_BPS-BITS_PER_SYMBOL);
    else
        assign normalized_motion[i] = absdiff[i][BITS_PER_SYMBOL-1 -: MOTION_BPS];

Do not re-generate the Qsys system after manually editing, as the change will be overwritten by Qsys.