Simplified palette predictor update for video coding

A method of decoding video data, the method comprising:

• dynamically select, based on a parameter of a first block of video data, a maximum number of entries to be used for palette-mode coding of the current block to only be either 16 or 32, wherein dynamically selecting the maximum number of entries comprises:
• selecting the maximum number of entries to be 16 responsive to the parameter having a first value;
• and
• selecting the maximum number of entries to be 32 responsive to the parameter having a second value that is different than the first value;
• generating, based on the determined maximum number of entries and based on a palette predictor, a palette for the first block of video data, the palette including one or more entries each including a palette index that is associated with a color value;
• decoding, from an encoded video bitstream and for the first block of video data, index values for samples of the first block that identify entries in the palette;
• and
• reconstructing, based on the index values, the samples of the first block.

A device for encoding video data, the device comprising

• a memory configured to store at least a portion of an encoded video bitstream;
• and
• one or more processors that are implemented in circuitry and configured to:
• dynamically select, based on a parameter of a first block of video data, a maximum number of entries to be used for palette-mode coding of the current block to only be either 16 or 32, wherein, to dynamically select the maximum number of entries, the one or more processors are configured to:
• select the maximum number of entries to be 16 responsive to the parameter having a first value;
• and
• select the maximum number of entries to be 32 responsive to the parameter having a second value that is different than the first value;
• generate, based on the determined maximum number of entries and based on a palette predictor, a palette for the first block of video data, the palette including one or more entries each including a palette index that is associated with a color value;
• and
• encode, in the encoded video bitstream and for the first block of video data, index values for samples of the first block that identify entries in the palette.

A method of encoding video data, the method comprising:

• dynamically select, based on a parameter of a first block of video data, a maximum number of entries to be used for palette-mode coding of the current block to only be either 16 or 32, wherein dynamically selecting the maximum number of entries comprises:
• selecting the maximum number of entries to be 16 responsive to the parameter having a first value;
• and
• selecting the maximum number of entries to be 32 responsive to the parameter having a second value that is different than the first value;
• generating, based on the determined maximum number of entries and based on a palette predictor, a palette for the first block of video data, the palette including one or more entries each including a palette index that is associated with a color value;
• and
• encoding, in an encoded video bitstream and for the first block of video data, index values for samples of the first block that identify entries in the palette.

A computer-readable storage medium having stored thereon instructions that, when executed, cause one or more processors of a video decoder to:

• dynamically select, based on a parameter of a first block of video data, a maximum number of entries to be used for palette-mode coding of the current block to only be either 16 or 32, wherein, the instructions that cause the one or more processors to dynamically select the maximum number of entries comprise instructions that cause the one or more processors to:
• select the maximum number of entries to be 16 responsive to the parameter having a first value;
• and
• select the maximum number of entries to be 32 responsive to the parameter having a second value that is different than the first value;
• generate, based on the determined maximum number of entries and based on a palette predictor, a palette for the first block of video data, the palette including one or more entries each including a palette index that is associated with a color value;
• decode, from an encoded video bitstream and for the first block of video data, index values for samples of the first block that identify entries in the palette;
• and
• reconstruct, based on the index values, the samples of the first block.

A computer-readable storage medium having stored thereon instructions that, when executed, cause one or more processors of a video encoder to:

• dynamically select, based on a parameter of a first block of video data, a maximum number of entries to be used for palette-mode coding of the current block to only be either 16 or 32, wherein, the instructions that cause the one or more processors to dynamically select the maximum number of entries comprise instructions that cause the one or more processors to:
• select the maximum number of entries to be 16 responsive to the parameter having a first value;
• and
• select the maximum number of entries to be 32 responsive to the parameter having a second value that is different than the first value;
• generate, based on the determined maximum number of entries and based on a palette predictor, a palette for the first block of video data, the palette including one or more entries each including a palette index that is associated with a color value;
• and
• encode, in an encoded video bitstream and for the first block of video data, index values for samples of the first block that identify entries in the palette.