Video intra prediction using hybrid recursive filters

A method of encoding video data, the method comprising:

• selecting, for a current block of the video data, an initial predictive block;
• filtering samples in a current line of a plurality of lines of the initial predictive block based on filtered values of one or more samples in a preceding line of the plurality of lines of the initial predictive block and unfiltered values of samples in the current line to generate filtered values for samples for the current line of the initial predictive block, wherein the plurality of lines comprises either a plurality of rows or a plurality of columns of the video data;
• and
• encoding, in a coded video bitstream, an indication of an intra-prediction mode that identifies the initial predictive block and residual data for the current block that represents a difference between the filtered values of the samples of the initial predictive block and the values of samples of the current block.

A device for encoding or decoding video data, the device comprising:

• a memory configured to store a portion of the video data;
• and
• one or more processors configured to:
• identify, for a current block of the video data, an initial predictive block;
• filter samples in a current line of a plurality of lines of the initial predictive block based on filtered values of samples in a preceding line of the plurality of lines of the initial predictive block and unfiltered values of one or more samples in the current line to generate filtered values for samples for the current line of the initial predictive block, wherein the plurality of lines comprises either a plurality of rows or a plurality of columns of the video data;
• and
• reconstruct, using intra prediction, values of samples of the current block based on the filtered values of the samples of the current initial predictive block and residual data for the current block that represents a difference between the filtered values of the samples of the current initial predictive block and the values of samples of the current block.