Altera Video and Image Processing Suite - Manual (Page 191)

Tuning Motion Shift
To tune the motion shift register, follow these steps:
1. Enable motion visualization; set
Visualize Motion Values
register to 1.
2. Disable cadence detection to ensure pure deinterlacing function is being observed; set
Cadence
Detect On
register to 0.
3. Feed the Broadcast Deinterlacer IP core with the sequence of interest, ideally one with static areas and
areas in motion, such as a waving flag sequence. Areas in the image where motion is detected will
appear in pink, with the luminance in proportion to the amount of motion detected.
4. Adjust the
Motion Shift
register through software when the Broadcast Deinterlacer IP core runs, to
observe the effect on the motion detected. Choose a motion shift value that does not cause any motion
to be detected in static areas of the image.
Active Video Threshold Adjustment
For best video-over-film results, Altera recommends that the system processor performs the following
steps:
• Polls the
3:2 Cadence State (VOF State)
register at least once per field.
• Sets the
Video Threshold
register:
• to a high value, for instance 250, if the
3:2 Cadence State (VOF State)
register is 0
• to a low value, for instance 1, if the
3:2 Cadence State (VOF State)
register is 1
12-32 Tuning Motion Shift
UG-VIPSUITE
2015.05.04
Altera Corporation Deinterlacing IP Cores
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