OPERATIONS FOR RE-DISCRETISATION AND MEASUREMENT OF IMAGE SIZE FOR CODING AND DECODING MULTIRESOLUTION VIDEO Russian patent published in 2011 - IPC H04N7/46 

FIELD: information technology.

SUBSTANCE: re-discretisation of a video image is performed in accordance with re-discretisation scaling factor. Re-discretisation includes calculation of a sampling value in position i, j in a re-discretisation array, wherein calculation includes calculation of the output horizontal or vertical position x or y for sub-sampling using a method which is associated with approximation of the value partly by multiplying the value 2n by the inverse (approximated or precise) the up-discretisation scaling factor. Approximateion may be rounded or another type of approximation, such as an upper or lower bound function, which approximates the closest whole number and the sampling value is interpolated using a filter.

EFFECT: high-precision calculation of the position for measuring image sizes in spatially scalable applications for video coding and decoding, which increases efficiency fo coding and decoding digital video.

21 cl, 17 dwg