SPATIALLY ENHANCED TRANSFORM CODING Russian patent published in 2011 - IPC H04N7/50 

FIELD: information technology.

SUBSTANCE: prediction error signals is calculated by determining values of the difference between sample values of a predicted data block and sample values of the initial input block. A modified error prediction signal is generated by replacing difference values which are overshoots with difference values which are not overshoots, wherein the difference value which is an overshoot depends on the expected value of the amplitude of the difference value. Further, transform coding is performed over the prediction error signal in order to create a first presentation of the first error signal component and spatial coding is performed over the prediction error signal in order to create a second presentation of the first prediction error signal component. The first and second presentations are merged and coded.

EFFECT: efficient spatial presentation of those prediction error signals of the same image block which are not well correlated with basic functions of the applied transformation.

33 cl, 11 dwg