INTERPOLATION FILTER SUPPORT FOR SUB-PIXEL RESOLUTION IN VIDEO CODING Russian patent published in 2013 - IPC H04N7/46 

FIELD: information technology.

SUBSTANCE: disclosed are filtering techniques applied by an encoder and a decoder during the prediction stage of a video encoding and/or decoding process, including useful twelve-pixel filter support which may be used for interpolation, techniques which use coefficient symmetry and pixel symmetry to reduce the amount of data needed to be sent between an encoder and a decoder to provide filter support for interpolation, and techniques for filtering data at integer pixel locations in a manner that is similar to sub-pixel interpolation. Other aspects of this disclosure relate to techniques for encoding information in a bit stream to convey the type of filter used, and possibly the filter coefficients used. Predictive coding of filter coefficients is also described.

EFFECT: high accuracy of predictive data used in fractional interpolation, which may improve predictive data of integer blocks of pixels.

39 cl, 29 dwg