FIELD: method for interpolating values of sub-pixels during encoding and decoding of data.
SUBSTANCE: method of interpolation during video data encoding is claimed, which features an image, containing pixels ordered in rows and columns and represented by values having given dynamic range, where pixels in rows are in integral horizontal positions, and pixels in rows are in integral vertical positions, which image is interpolated in such a way that values of sub-pixels are generated in fractional horizontal and vertical positions, aforementioned method containing following stages: a) when values are required for sub-pixels in half-integral horizontal positions and integral vertical positions and in integral horizontal positions and half-integral vertical positions, such values are interpolated directly using weighted sums of pixels located in integral horizontal and integral vertical positions; b) when values are required for sub-pixels in half-integral horizontal positions and half-integral vertical positions, such values are interpolated directly using a weighted sum of values for sub-pixels located in half-integral horizontal positions and integral vertical positions, computed in accordance with stage a); and c), when values are required for sub-pixel in quaternary horizontal position and quaternary vertical position, such values are interpolated by averaging of at least one pair from first pair of values of sub-pixel located in half-integral horizontal position and half-integral vertical position, and of sub-pixel, located in integral horizontal position and integral vertical position, and second pair of values of pixel, located in integral horizontal position and integral vertical position, and of sub-pixel, located in semi-integral horizontal position and semi-integral vertical position.
EFFECT: creation of improved method for interpolating values of sub-pixels during encoding and decoding of data.
13 cl, 26 dwg, 2 tbl
