| US 7,580,077 B2 | ||
| Conversion of video data from interlaced to non-interlaced format | ||
| Paolo Giuseppe Fazzini, Watford (United Kingdom) | ||
| Assigned to Imagination Technologies Limited, Hertfordshire (United Kingdom) | ||
| Filed on May 09, 2005, as Appl. No. 11/125,413. | ||
| Claims priority of application No. 0502597.8 (GB), filed on Feb. 08, 2005. | ||
| Prior Publication US 2006/0176393 A1, Aug. 10, 2006 | ||
| Int. Cl. H04N 11/20 (2006.01); H04N 7/01 (2006.01) | ||
| U.S. Cl. 348—448 [348/458] | 11 Claims |
| 1. A method for converting an interlaced video signal to a progressive scan video signal, the method comprising the steps
of:
deriving, for each pixel in each missing line of a video field in the interlaced video signal to be converted, correlation
data, using a correlator unit, for each of a set of possible interpolations between adjacent pixels to be used in reconstructing
the pixel in the missing line;
deriving a confidence measure using a confidence evaluation unit from the correlation data;
selecting adjustment data using an adjustment curve selector for the correlation data in dependence on the confidence measure;
adjusting the correlation data with the adjustment data, using a resultant data generator;
determining, using a resultant data analysis unit, from the adjusted correlation data an interpolation scheme that is most
likely to accurately produce the pixel in the missing line; and
interpolating, by an interpolator, the pixel in the missing line using the interpolation scheme selected by an interpolation
scheme selector,
wherein the step of selecting the adjustment data selects data which will cause greater adjustment of the correlation data
as the confidence measure decreases.
|