Video and Vision Processing Suite Intel® FPGA IP User Guide

ID 683329
Date 7/08/2024
Public

A newer version of this document is available. Customers should click here to go to the newest version.

Document Table of Contents
1. About the Video and Vision Processing Suite 2. Getting Started with the Video and Vision Processing IPs 3. Video and Vision Processing IPs Functional Description 4. Video and Vision Processing IP Interfaces 5. Video and Vision Processing IP Registers 6. Video and Vision Processing IPs Software Programming Model 7. Protocol Converter Intel® FPGA IP 8. 1D LUT Intel® FPGA IP 9. 3D LUT Intel® FPGA IP 10. Adaptive Noise Reduction Intel® FPGA IP 11. Advanced Test Pattern Generator Intel® FPGA IP 12. AXI-Stream Broadcaster Intel® FPGA IP 13. Bits per Color Sample Adapter Intel FPGA IP 14. Black Level Correction Intel® FPGA IP 15. Black Level Statistics Intel® FPGA IP 16. Chroma Key Intel® FPGA IP 17. Chroma Resampler Intel® FPGA IP 18. Clipper Intel® FPGA IP 19. Clocked Video Input Intel® FPGA IP 20. Clocked Video to Full-Raster Converter Intel® FPGA IP 21. Clocked Video Output Intel® FPGA IP 22. Color Plane Manager Intel® FPGA IP 23. Color Space Converter Intel® FPGA IP 24. Defective Pixel Correction Intel® FPGA IP 25. Deinterlacer Intel® FPGA IP 26. Demosaic Intel® FPGA IP 27. FIR Filter Intel® FPGA IP 28. Frame Cleaner Intel® FPGA IP 29. Full-Raster to Clocked Video Converter Intel® FPGA IP 30. Full-Raster to Streaming Converter Intel® FPGA IP 31. Genlock Controller Intel® FPGA IP 32. Generic Crosspoint Intel® FPGA IP 33. Genlock Signal Router Intel® FPGA IP 34. Guard Bands Intel® FPGA IP 35. Histogram Statistics Intel® FPGA IP 36. Interlacer Intel® FPGA IP 37. Mixer Intel® FPGA IP 38. Pixels in Parallel Converter Intel® FPGA IP 39. Scaler Intel® FPGA IP 40. Stream Cleaner Intel® FPGA IP 41. Switch Intel® FPGA IP 42. Tone Mapping Operator Intel® FPGA IP 43. Test Pattern Generator Intel® FPGA IP 44. Unsharp Mask Intel® FPGA IP 45. Video and Vision Monitor Intel FPGA IP 46. Video Frame Buffer Intel® FPGA IP 47. Video Frame Reader Intel FPGA IP 48. Video Frame Writer Intel FPGA IP 49. Video Streaming FIFO Intel® FPGA IP 50. Video Timing Generator Intel® FPGA IP 51. Vignette Correction Intel® FPGA IP 52. Warp Intel® FPGA IP 53. White Balance Correction Intel® FPGA IP 54. White Balance Statistics Intel® FPGA IP 55. Design Security 56. Document Revision History for Video and Vision Processing Suite User Guide

25.3. Deinterlacer IP Functional Description

The IP offers bob, weave, or motion adaptive deinterleavers.
Figure 67. Bob DeinterlacingThe figure shows the bob deinterlacing where the IP drops or deinterlaces interlaced fields. The IP passes all progressive frames through.
Figure 68. Weave Interlacing

The figure shows the weave deinterlacing, where the IP drops or deinterlaces interlaced fields. The IP passes all progressive frames through. For incoming F1 and F0, the weave deinterlacer deinterlaces or drops the fields based on the nibble values. For more information on nibble, refer to the Intel FPGA Streaming Video Protocol Specification.

For motion adaptive deinterlacer, the IP calculates the motion coefficient for each pixel and calculates the output pixel depending on motion coefficient. If the motion calculated from the current and the previous pixels is higher than the stored motion value, the stored motion value is irrelevant. The IP uses the calculated motion in the blending algorithm, which then becomes the next stored motion value. However, if the computed motion value is lower than the stored motion value, the following actions occur:

  • The IP determines the next stored motion value by calculating the sum of three-fourth of the computed motion and one-fourths of the previously stored motion.
  • The blending algorithm uses the next stored motion value.

This computed motion means that the motion that the blending algorithm uses climbs up immediately, but takes a few frames to stabilize. The motion-adaptive algorithm fills in the rows that are missing in the current field by calculating a function of other pixels in the current field and the three preceding fields as in the following sequence:

  1. The IP collects pixels from the current field and the three preceding it (the X denotes the location of the desired output pixel).
    Figure 69. Pixel Collection for the Motion-Adaptive Algorithm


  2. The IP assembels these pixels into two 3×3 groups of pixels.
    Figure 70. Pixel Assembly for the Motion-Adaptive AlgorithmThe figure shows the minimum absolute difference of the two groups.
  3. The IP normalizes the minimum absolute difference value into the same range as the input pixel data. The IP compares the motion value with a recorded motion value for the same location in the previous frame. If it is greater, the IP keeps the new value. If the new value is less than the stored value, the IP uses the motion value that is the mean of the two values. This action reduces unpleasant flickering artifacts.
  4. The IP uses a weighted mean of the interpolation pixels to calculate the output pixel and the equivalent to the output pixel in the previous field with the following equation: