Adaptive filter intra prediction modes in image/video compression

An apparatus for generating a prediction block for coding a block of a frame using intra prediction, the apparatus comprising:

• a processor configured to:
• determine an adaptive intra-prediction mode indicative of at least a training region and a configuration of neighboring pixel locations, wherein the adaptive intra-prediction mode is one of a plurality of adaptive intra-prediction modes, Sk, and wherein the training region neighbors the block and comprises a plurality of reconstructed pixels;
• determine filter coefficients used to obtain respective prediction pixels of neighboring pixels within the training region when applied to defined respective configurations of the neighboring pixels according to the configuration of the neighboring pixels,
• wherein the filter coefficients minimize a function of differences, each difference being a respective difference between a pixel in the training region and a prediction of that pixel in the training region;
• and
• generate the prediction block by recursive extrapolations that use the filter coefficients by predicting each pixel of the prediction block by applying the filter coefficients to the configuration of neighboring pixels for the pixel being predicted.

A non-transitory computer-readable storage medium, comprising executable instructions that, when executed by a processor, facilitate performance of operations for coding a block of a frame using intra prediction and comprising:

• determining an adaptive intra-prediction mode indicative of at least a training region and a configuration of neighboring pixel locations, wherein the adaptive intra-prediction mode is one of a plurality of adaptive intra-prediction modes, Sk, and wherein the training region neighbors the block and comprises a plurality of reconstructed pixels;
• determining filter coefficients used to obtain respective prediction pixels of neighboring pixels within the training region when applied to defined respective configurations of the neighboring pixels according to the configuration of the neighboring pixels,
• wherein the filter coefficients minimize a function of differences, each difference being a respective difference between a pixel in the training region and a prediction of that pixel in the training region;
• and
• generating a prediction block for the block by recursive extrapolations that use the filter coefficients by predicting each pixel of the prediction block by applying the filter coefficients to the configuration of neighboring pixels for the pixel being predicted.