Method and system for 3D bidirectional comb filtering
View Patent ↗Methods and systems for 3D bidirectional comb filtering of a video signal are provided. Aspects of the method may include generating a plurality of interpolated pixels for a current line, a next line and a previous line in a current frame. A plurality of interpolated pixels may be generated in a previous frame, which corresponds to the interpolated pixels in the current frame. A plurality of interpolated pixels may be generated in a next frame, which corresponds to the interpolated pixels in the current frame. At least one direction of least bandwidth may be determined among at least a portion of all the generated interpolated pixels and true pixels in the current frame. Combing may be blended according to the determined at least one direction of least bandwidth.
1. A method for separating luma and chroma components in a composite video signal, the method comprising:
generating a plurality of interpolated pixels for a current line, a next line and a previous line in a current frame;
generating a plurality of interpolated pixels in a previous frame, which corresponds to the interpolated pixels in the current frame;
generating a plurality of interpolated pixels in a next frame, which corresponds to the interpolated pixels in the current frame;
determining at least one direction of least bandwidth among at least a portion of all the generated interpolated pixels and true pixels in the current frame; and
blending combing according to the determined at least one direction of least bandwidth.
2. The method of claim 1 , wherein the interpolated pixels for the current frame are one half cycle phase-shifted from the interpolated pixels in the previous frame.
3. The method of claim 1 , wherein the interpolated pixels for the current frame are one half cycle phase-shifted from the interpolated pixels in the next frame.
4. The method of claim 1 , wherein the interpolated pixels for the previous frame are in-phase with the interpolated pixels in the next frame.
5. The method of claim 1 , comprising generating the plurality of interpolated pixels for the current line, so that each of the plurality of interpolated pixels in the current line is one quarter cycle phase-shifted from a corresponding adjacent pixel in the current line.
6. The method of claim 5 , comprising combing horizontally, if the determined direction of least bandwidth is among in-phase interpolated pixels in the current line.
7. The method of claim 1 , comprising combing vertically, if the determined direction of least bandwidth is among corresponding in-phase interpolated pixels in the current line and at least one of the previous line and the next line.
8. The method of claim 1 , comprising combing vertically, if the determined direction of least bandwidth is among corresponding one-half cycle phase-shifted true pixels in the current line and at least one of the previous line and the next line for a luma-only video signal.
9. The method of claim 1 , comprising combing temporally, if the determined direction of least bandwidth is among corresponding in-phase interpolated pixels in the previous frame and in the next frame.
10. The method of claim 1 , comprising combing temporally, if the determined direction of least bandwidth is among corresponding in-phase true pixels in the previous frame and in the next frame.
11. The method of claim 1 , comprising combing in a horizontal direction and a vertical direction for the current video frame.
12. The method of claim 11 , comprising blending the combing in the horizontal direction and the vertical direction and combing in a temporal direction for the current video frame.
13. A machine-readable storage having stored thereon, a computer program having at least one code section for separating luma and chroma components in a composite video signal, the at least one code section being executable by a machine for causing the machine to perform steps comprising:
generating a plurality of interpolated pixels for a current line, a next line and a previous line in a current frame;
generating a plurality of interpolated pixels in a previous frame, which corresponds to the interpolated pixels in the current frame;
generating a plurality of interpolated pixels in a next frame, which corresponds to the interpolated pixels in the current frame;
determining at least one direction of least bandwidth among at least a portion of all the generated interpolated pixels and true pixels in the current frame; and
blending combing according to the determined at least one direction of least bandwidth.
14. The machine-readable storage of claim 13 , wherein the interpolated pixels for the current frame are one half cycle phase-shifted from the interpolated pixels in the previous frame.
15. The machine-readable storage of claim 13 , wherein the interpolated pixels for the current frame are one half cycle phase-shifted from the interpolated pixels in the next frame.
16. The machine-readable storage of claim 13 , wherein the interpolated pixels for the previous frame are in-phase with the interpolated pixels in the next frame.
17. The machine-readable storage of claim 13 , comprising code for generating the plurality of interpolated pixels for the current line, so that each of the plurality of interpolated pixels in the current line is one quarter cycle phase-shifted from a corresponding adjacent pixel in the current line.
18. The machine-readable storage of claim 17 , comprising code for combing horizontally, if the determined direction of least bandwidth is among in-phase interpolated pixels in the current line.
19. The machine-readable storage of claim 13 , comprising code for combing vertically, if the determined direction of least bandwidth is among corresponding in-phase interpolated pixels in the current line and at least one of the previous line and the next line.
20. The machine-readable storage of claim 13 , comprising code for combing vertically, if the determined direction of least bandwidth is among corresponding one-half cycle phase-shifted true pixels in the current line and at least one of the previous line and the next line for a luma-only video signal.
21. The machine-readable storage of claim 13 , comprising code for combing temporally, if the determined direction of least bandwidth is among corresponding in-phase interpolated pixels in the previous frame and in the next frame.
22. The machine-readable storage of claim 13 , comprising code for combing temporally, if the determined direction of least bandwidth is among corresponding in-phase true pixels in the previous frame and in the next frame.
23. The machine-readable storage of claim 13 , comprising code for combing in a horizontal direction and a vertical direction for the current video frame.
24. The machine-readable storage of claim 23 , comprising code for blending the combing in the horizontal direction and the vertical direction and combing in a temporal direction for the current video frame.
25. A system for separating luma and chroma components in a composite video signal, the system comprising:
at least one processor that generates a plurality of interpolated pixels for a current line, a next line and a previous line in a current frame;
the at least one processor generates a plurality of interpolated pixels in a previous frame, which corresponds to the interpolated pixels in the current frame;
the at least one processor generates a plurality of interpolated pixels in a next frame, which corresponds to the interpolated pixels in the current frame;
the at least one processor determines at least one direction of least bandwidth among at least a portion of all the generated interpolated pixels and true pixels in the current frame; and
the at least one processor blends combing according to the determined at least one direction of least bandwidth.
26. The system of claim 25 , wherein the interpolated pixels for the current frame are one half cycle phase-shifted from the interpolated pixels in the previous frame.
27. The system of claim 25 , wherein the interpolated pixels for the current frame are one half cycle phase-shifted from the interpolated pixels in the next frame.
28. The system of claim 25 , wherein the interpolated pixels for the previous frame are in-phase with the interpolated pixels in the next frame.
29. The system of claim 25 , wherein the at least one processor generates the plurality of interpolated pixels for the current line, so that each of the plurality of interpolated pixels in the current line is one quarter cycle phase-shifted from a corresponding adjacent pixel in the current line.
30. The system of claim 29 , wherein the at least one processor combs horizontally, if the determined direction of least bandwidth is among in-phase interpolated pixels in the current line.
31. The system of claim 25 , wherein the at least one processor combs vertically, if the determined direction of least bandwidth is among corresponding in-phase interpolated pixels in the current line and at least one of the previous line and the next line.
32. The system of claim 25 , wherein the at least one processor combs vertically, if the determined direction of least bandwidth is among corresponding one-half cycle phase-shifted true pixels in the current line and at least one of the previous line and the next line for a luma-only video signal.
33. The system of claim 25 , wherein the at least one processor combs temporally, if the determined direction of least bandwidth is among corresponding in-phase interpolated pixels in the previous frame and in the next frame.
34. The system of claim 25 , wherein the at least one processor combs temporally, if the determined direction of least bandwidth is among corresponding in-phase true pixels in the previous frame and in the next frame.
35. The system of claim 25 , wherein the at least one processor combs in a horizontal direction and a vertical direction for the current video frame.
36. The system of claim 35 , wherein the at least one processor blends the combing in the horizontal direction and the vertical direction and combing in a temporal direction for the current video frame.