Matrix intra prediction and cross-component linear model prediction harmonization for video coding

A method of encoding video data, the method comprising:

• predicting, by one or more processors implemented in circuitry, luma samples for a block of the video data using matrix intra prediction (MIP), wherein using MIP comprises down-sampling a set of luma neighboring samples to generate down-sampled luma neighboring samples;
• predicting, by the one or more processors, chroma samples for the block using cross-component linear model (CCLM) prediction, wherein using CCLM prediction comprises predicting the chroma samples for the block based on the down-sampled luma neighboring samples generated from the MIP;
• generating, by the one or more processors, a prediction block for the block based on the luma samples and the chroma samples;
• generating, by the one or more processors, a residual block for the block based on differences between the block and the prediction block;
• and
• encoding, by the one or more processors, the residual block.

A device for decoding video data, the device comprising:

• a memory configured to store the video data;
• and
• one or more processors implemented in circuitry and configured to:
• predict luma samples for a block of the video data using matrix intra prediction (MIP), wherein, to predict the luma samples using MIP, the one or more processors are configured to down-sample a set of luma neighboring samples to generate down-sampled luma neighboring samples;
• predict chroma samples for the block using cross-component linear model (CCLM) prediction, wherein, to predict the chroma samples using CCLM prediction, the one or more processors are configured to predict the chroma samples for the block based on the down-sampled luma neighboring samples generated from the MIP;
• generate a prediction block for the block based on the luma samples and the chroma samples;
• decode a residual block for the block;
• and
• combine the prediction block and the residual block to decode the block.

A device for encoding video data, the device comprising:

• a memory configured to store video data;
• and
• one or more processors implemented in circuitry and configured to:
• predict luma samples for a block of the video data using matrix intra prediction (MIP), wherein, to predict the luma samples using MIP, the one or more processors are configured to down-sample a set of luma neighboring samples to generate down-sampled luma neighboring samples;
• predict chroma samples for the block using cross-component linear model (CCLM) prediction, wherein, to predict the chroma samples using CCLM prediction, the one or more processors are configured to predict the chroma samples for the block based on the down-sampled luma neighboring samples generated from the MIP;
• generate a prediction block for the block based on the luma samples and the chroma samples;
• generate a residual block for the block based on differences between the block and the prediction block;
• and
• encode the residual block.