Method and apparatus for high quality video motion adaptive edge-directional deinterlacing

• US 8,259,228 B2
• Filed: 12/10/2007
• Issued: 09/04/2012
• Est. Priority Date: 12/10/2007
• Status: Active Grant

• Current Assignee: ATI Technologies ULC (Advanced Micro Devices, Inc.)
• Original Assignee: ATI Technologies ULC (Advanced Micro Devices, Inc.)
• Inventors: Wei, Jeff, Glen, David
• Primary Examiner(s): NGUYEN BA, HOANG VU A
• Application Number:
  US11/953,283
• Publication Number:
  US 20090147133A1
• Time in Patent Office: 1,730 Days
• Field of Search: 348448-452, 382/300
• US Class Current: 348/452
• CPC Class Codes: H04N 5/142 Edging; Contouring
• CPC Class Codes: H04N 5/144 Movement detection for video coding H04N19/503; analysis of motion in general G06T7/20
• CPC Class Codes: H04N 7/012 Conversion between an interlaced and a progressive signal for graphics images G09G2310/0229
• CPC Class Codes: H04N 7/0137 dependent on presence/absence of motion, e.g. of motion zones H04N7/014 takes precedence; movement detection in television signals H04N5/144
• CPC Class Codes: H04N 7/0142 the interpolation being edge adaptive edge detection in television signals H04N5/142; edge-driven scaling G06T3/403

Abstract

A method for deinterlacing video includes constructing a temporary frame of deinterlaced video based on a first (i.e., current) field of interlaced video, wherein the temporary frame includes pixels in lines of the temporary frame associated with the first field of interlaced video, placeholder pixels in identified areas of motion in lines of the frame associated with a missing field of interlaced video, and pixels from an opposite field of polarity of interlaced video in areas without motion. The method further includes replacing the placeholder pixels in the identified areas of motion with pixels interpolated using an edge direction interpolation scheme based on pixels in the first field of interlaced video, resulting in a reconstructed frame. In one example, a motion adaptive interpolator may construct the temporary frame, and an edge directional interpolator may generate the reconstructed/deinterlaced the frame.

Claims

1. A method for deinterlacing video comprising:

constructing a temporary frame of deinterlaced video based on a first field of interlaced video, wherein the temporary frame comprises pixels, from the first field of interlaced video, in lines of the temporary frame associated with the first field of interlaced video, placeholder pixels in identified areas of motion in lines of the temporary frame associated with a missing field of interlaced video, and pixels from an opposite field of polarity of interlaced video in areas without motion; and

replacing the placeholder pixels in the identified areas of motion with pixels interpolated using an edge direction interpolation scheme based on pixels in the first field of interlaced video.

2. The method of claim 1, wherein the placeholder pixels are one of:

a predetermined value; and

interpolated pixels using a spatial interpolation method using pixels in the first field of interlaced video.

3. The method of claim 1 further including:

identifying the placeholder pixels in the lines of the temporary frame associated with a missing field of interlaced video in the temporary frame.

4. The method of claim 1 wherein the edge directional interpolation scheme is an edge line adaptive interpolation scheme.

5. The method of claim 1 further comprising:

generating motion detection information based on a current field and other pixel information; and

based on the motion detection information, selecting between either the placeholder pixels or the pixels from an opposite field of polarity to construct the temporary frame of deinterlaced video.

6. An integrated circuit for deinterlacing video comprising:

a motion adaptive interpolator operative to receive pixels associated with a current field and pixels associated with other pixel information, the motion adaptive interpolator operative to generate a temporary frame based on the pixels for the current field and the pixels associated with the other pixel information; and

an edge directional interpolator operative to receive the temporary frame and generate a reconstructed frame.

7. The integrated circuit of claim 6, wherein the temporary frame comprises:

pixels, from a first field of interlaced video, in lines of the temporary frame associated with a first field of interlaced video;

placeholder pixels in identified areas of motion in lines of the temporary frame associated with a missing field of interlaced video; and

pixels from an opposite field of polarity of interlaced video in areas without motion.

8. The integrated circuit of claim 7, wherein the placeholder pixels in identified areas of motion in lines of the temporary frame are marker pixels.

9. The integrated circuit of claim 7, wherein the edge directional interpolator includes a placeholder pixel detector operative to detect the placeholder pixels in identified areas of motion in lines of the temporary frame.

10. The integrated circuit of claim 6 wherein the edge directional interpolator includes an edge line adaptive interpolator.

11. An integrated circuit for deinterlacing video comprising:

a motion adaptive interpolator operative to receive pixels associated with a current field and pixels associated with other pixel information, the motion adaptive interpolator operative to generate a temporary frame based on the pixels for the current field and the pixels associated with the other pixel information; and

an edge directional interpolator operative to receive the temporary frame and generate a reconstructed frame;

wherein the motion adaptive interpolator is a pixel shader; and

wherein the edge directional interpolator is a dedicated circuit separate from the pixel shader.

12. The integrated circuit of claim 11, wherein the temporary frame comprises:

pixels, from a first field of interlaced video, in lines of the temporary frame associated with a first field of interlaced video;

placeholder pixels in identified areas of motion in lines of the temporary frame associated with a missing field of interlaced video; and

pixels from an opposite field of polarity of interlaced video in areas without motion.

13. The integrated circuit of claim 12, wherein the edge directional interpolator includes a placeholder pixel detector operative to detect the placeholder pixels in identified areas of motion in lines of the temporary frame.

14. The integrated circuit of claim 12, wherein the edge directional interpolator includes an edge line adaptive interpolator.

15. An electronic apparatus comprising:

a display; and

a video processing system comprising an integrated circuit comprising;

a motion adaptive interpolator operative to receive pixels associated with a current field and pixels associated with other pixel information, the motion adaptive interpolator operative to generate a temporary frame based on the pixels for the current field and the pixels associated with the other pixel information; and

an edge directional interpolator operative to receive the temporary frame and generate a reconstructed frame.

16. The electronic apparatus of claim 15, wherein the temporary frame comprises:

pixels, from a first field of interlaced video, in lines of the temporary frame associated with a first field of interlaced video;

placeholder pixels in identified areas of motion in lines of the temporary frame associated with a missing field of interlaced video; and

pixels from an opposite field of polarity of interlaced video in areas without motion.

17. The electronic apparatus of claim 16, wherein the edge directional interpolator includes a placeholder pixel detector operative to detect the placeholder pixels in identified areas of motion in lines of the temporary frame.

18. A method for deinterlacing video comprising:

constructing a temporary field of deinterlaced video based on a first field of interlaced video, wherein the temporary field comprises placeholder pixels in identified areas of motion in lines of the temporary field associated with a missing field of interlaced video and pixels from an opposite field of polarity of interlaced video in areas without motion; and

replacing the placeholder pixels in the identified areas of motion with pixels interpolated using an edge direction interpolation scheme based on pixels in the first field of interlaced video.

19. The method of claim 18, wherein the placeholder pixels are one of:

a predetermined value; and

interpolated pixels using a spatial interpolation method using pixels in the first field of interlaced video.

20. The method of claim 18 further comprising:

generating motion detection information based on a current field and other pixel information; and

based on the motion detection information, selecting between either the placeholder pixels or the pixels from an opposite field of polarity to construct the temporary field of deinterlaced video.

21. An integrated circuit for deinterlacing video comprising:

a motion adaptive interpolator operative to receive pixels associated with a current field and pixels associated with other pixel information, the motion adaptive interpolator operative to generate a temporary field based on the pixels for the current field and the pixels associated with the other pixel information; and

an edge directional interpolator operative to receive the temporary field, to receive the pixels associated with the current field, and to generate a reconstructed frame.

22. The integrated circuit of claim 21, wherein the temporary field comprises:

placeholder pixels in identified areas of motion in lines of the temporary field associated with a missing field of interlaced video; and

pixels from an opposite field of polarity of interlaced video in areas without motion.

23. The integrated circuit of claim 22, wherein the placeholder pixels in identified areas of motion in lines of the temporary field are marker pixels.

24. The integrated circuit of claim 22, wherein the edge directional interpolator includes a placeholder pixel detector operative to detect the placeholder pixels in identified areas of motion in lines of the temporary field.