Multiple neural network models for filtering during video coding

A device for filtering decoded video data, the device comprising:

• a memory configured to store video data;
• and
• one or more processors implemented in circuitry and configured to:
• decode a picture of video data;
• code a value for a syntax element representing a neural network model to be used to filter a portion of the decoded picture, the value representing an index into a set of pre-defined neural network models, the index corresponding to the neural network model in the set of pre-defined neural network models;
• and
• filter the portion of the decoded picture using the neural network model corresponding to the index.

A computer-readable storage medium having stored thereon instructions that, when executed, cause a processor to:

• decode a picture of video data;
• code a value for a syntax element representing a neural network model to be used to filter a portion of the decoded picture, the value representing an index into a set of pre-defined neural network models, the index corresponding to the neural network model in the set of pre-defined neural network models;
• and
• filter the portion of the decoded picture using the neural network model corresponding to the index.

A device for filtering decoded video data, the device comprising:

• means for decoding a picture of video data;
• means for coding a value for a syntax element representing a neural network model to be used to filter a portion of the decoded picture, the value representing an index into a set of pre-defined neural network models, the index corresponding to the neural network model in the set of pre-defined neural network models;
• and
• means for filtering the portion of the decoded picture using the neural network model corresponding to the index.