Method and system for a correlation sharpening filter
View Patent ↗Methods and systems for correlation sharpening filtering of a composite video signal are provided. A correlation between a current pixel and at least one adjacent pixel may be determined. A plurality of chroma video signal components of a composite video signal may be blended based on the determined correlation. A luma video signal component may be determined based on the blended chroma video signal components. At least a portion of the plurality of chroma video signal components may be filtered, resulting in filtered chroma video signals. At least a portion of the plurality of chroma video signal components may be blended with the filtered chroma video signal based on the determined correlation. The blended at least a portion of the plurality of chroma video signal components may be removed from the composite video signal to obtain the luma video signal component.
1. A method for separating luma and chroma components in a composite video signal, the method comprising:
determining a correlation between a current pixel and at least one adjacent pixel;
blending a plurality of chroma video signal components of a composite video signal based on the determined correlation; and
determining a luma video signal component based on the blended chroma video signal components.
2. The method according to claim 1 , comprising filtering at least a portion of the plurality of chroma video signal components resulting in filtered chroma video signal.
3. The method according to claim 2 , comprising blending at least a portion of the plurality of chroma video signal components and the filtered chroma video signal based on the determined correlation.
4. The method according to claim 3 , comprising removing the blended at least a portion of the plurality of chroma video signal components from the composite video signal to obtain the luma video signal component.
5. The method according to claim 2 , comprising narrow band pass filtering the plurality of chroma video signal components.
6. The method according to claim 1 , wherein the composite video signal is a PAL composite video signal.
7. The method according to claim 1 , wherein the composite video signal is a NTSC composite video signal.
8. 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 to perform steps comprising:
determining a correlation between a current pixel and at least one adjacent pixel;
blending a plurality of chroma video signal components of a composite video signal based on the determined correlation; and
determining a luma video signal component based on the blended chroma video signal components.
9. The machine-readable storage according to claim 8 , comprising code for filtering at least a portion of the plurality of chroma video signal components resulting in filtered chroma video signal.
10. The machine-readable storage according to claim 9 , comprising code for blending at least a portion of the plurality of chroma video signal components and the filtered chroma video signal based on the determined correlation.
11. The machine-readable storage according to claim 10 , comprising code for removing the blended at least a portion of the plurality of chroma video signal components from the composite video signal to obtain the luma video signal component.
12. The machine-readable storage according to claim 9 , comprising code for narrow band pass filtering the plurality of chroma video signal components.
13. The machine-readable storage according to claim 8 , wherein the composite video signal is a PAL composite video signal.
14. The machine-readable storage according to claim 8 , wherein the composite video signal is a NTSC composite video signal.
15. A system for separating luma and chroma components in a composite video signal, the system comprising:
first circuitry that determines a correlation between a current pixel and at least one adjacent pixel;
second circuitry that blends a plurality of chroma video signal components of a composite video signal based on the determined correlation; and
third circuitry that determines a luma video signal component based on the blended chroma video signal components.
16. The system according to claim 15 , comprising a filter that filters at least a portion of the plurality of chroma video signal components resulting in filtered chroma video signal.
17. The system according to claim 15 , wherein the first circuitry comprises chroma decision circuitry, the second circuitry comprises blending circuitry and the third circuitry comprises separation circuitry.
18. The system according to claim 16 , wherein the second circuitry blends at least a portion of the plurality of chroma video signal components and the filtered chroma video signal based on the determined correlation.
19. The system according to claim 18 , wherein the third circuitry removes the blended at least a portion of the plurality of chroma video signal components from the composite video signal to obtain the luma video signal component.
20. The system according to claim 16 , wherein the filter narrow band pass filters the plurality of chroma video signal components.
21. The system according to claim 15 , wherein the composite video signal is a PAL composite video signal.
22. The system according to claim 15 , wherein the composite video signal is a NTSC composite video signal.
23. The system according to claim 15 , wherein the third circuitry comprises a processor.