Multiple prediction models and signaling in video coding

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

• one or more memories configured to store the video data;
• and
• processing circuitry coupled to the one or more memories, wherein the processing circuitry is configured to:
• for each of a plurality of models, derive respective model parameters associated with respective corresponding models of the plurality of models utilizing a first set of samples;
• determine a respective cost value associated with the corresponding models of the plurality of models utilizing the respective model parameters and a second set of samples to generate respective cost values for the plurality of models, wherein the first set of samples and the second set of samples are exclusive of one another;
• determine a model of the plurality of models to use for encoding or decoding a current block based on the respective cost values;
• and
• encode or decode the current block based on the determined model.

One or more computer-readable storage media storing instructions thereon that when executed cause one or more processors to:

• for each of a plurality of models, derive respective model parameters associated with respective corresponding models of the plurality of models utilizing a first set of samples;
• determine a respective cost value associated with the corresponding models of the plurality of models utilizing the respective model parameters and a second set of samples to generate respective cost values for the plurality of models, wherein the first set of samples and the second set of samples are exclusive of one another;
• determine a model of the plurality of models to use for encoding or decoding a current block based on the respective cost values;
• and
• encode or decode the current block based on the determined model.