Granted Patent B2

US 12,549,774 · App. 18/916,422 · Granted Feb 10, 2026

Inventors: Hong-Jheng Jhu (Beijing, CN); Yi-Wen Chen (Beijing, CN); Xiaoyu Xiu (Beijing, CN); Xianglin Wang (Beijing, CN); Tsung-Chuan Ma (Beijing, CN); Bing Yu (Beijing, CN)

Assignee: BEIJING DAJIA INTERNET INFORMATION TECHNOLOGY CO., LTD.

H04N19/70H04N19/176H04N19/186H04N19/1883H04N19/46

Abstract

Claims (60)

1 . A method of encoding video data, comprising:

deriving a plurality of variables associated with a coding unit, wherein the plurality of variables indicate a luma coding block size and a coding tree type;

determining a palette mode block size threshold for the coding unit in accordance with the coding tree type;

at least in accordance with a determination that the luma coding block size is greater than the palette mode block size threshold:

determining a palette mode enable flag associated with the coding unit; and

encoding the coding unit in accordance with the palette mode enable flag.

2 . The method according to claim 1 , wherein the encoding the coding unit in accordance with the palette mode enable flag comprises:

when the palette mode enable flag indicates that a palette mode is enabled for the coding unit:

determining a palette table for the coding unit; and

encoding the coding unit using the palette table.

3 . The method according to claim 1 , wherein the determining the palette mode block size threshold for the coding unit in accordance with the coding tree type comprises:

when the coding tree type is SINGLE TREE or DUAL TREE LUMA:

setting the palette mode block size threshold to be 16; and

when the coding tree type is DUAL TREE CHROMA:

setting the palette mode block size threshold in accordance with a chroma format.

4 . The method according to claim 3 , wherein, when the chroma format is 4:4:4, the palette mode block size threshold is 16.

5 . The method according to claim 3 , wherein, when the chroma format is 4:2:2, the palette mode block size threshold is 32.

6 . The method according to claim 3 , wherein, when the chroma format is 4:2:0, the palette mode block size threshold is 64.

7 . An electronic apparatus comprising:

one or more processing units;

memory coupled to the one or more processing units;

a transmitter, configured to transmit a bitstream; and

a plurality of programs stored in the memory that, when executed by the one or more processing units, cause the electronic apparatus to perform operations to generate the bitstream, the operations including:

deriving a plurality of variables associated with a coding unit, wherein the plurality of variables indicate a luma coding block size and a coding tree type;

determining a palette mode block size threshold for the coding unit in accordance with the coding tree type;

at least in accordance with a determination that the luma coding block size is greater than the palette mode block size threshold:

determining a palette mode enable flag associated with the coding unit; and

encoding the coding unit in accordance with the palette mode enable flag.

8 . The electronic apparatus according to claim 7 , wherein the encoding the coding unit in accordance with the palette mode enable flag comprises:

when the palette mode enable flag indicates that a palette mode is enabled for the coding unit:

determining a palette table for the coding unit; and

encoding the coding unit using the palette table.

9 . The electronic apparatus according to claim 7 , wherein the determining the palette mode block size threshold for the coding unit in accordance with the coding tree type comprises:

when the coding tree type is SINGLE TREE or DUAL TREE LUMA:

setting the palette mode block size threshold to be 16; and

when the coding tree type is DUAL TREE CHROMA:

setting the palette mode block size threshold in accordance with a chroma format.

10 . The electronic apparatus according to claim 9 , wherein, when the chroma format is 4:4:4, the palette mode block size threshold is 16.

11 . The electronic apparatus according to claim 9 , wherein, when the chroma format is 4:2:2, the palette mode block size threshold is 32.

12 . The electronic apparatus according to claim 9 , wherein, when the chroma format is 4:2:0, the palette mode block size threshold is 64.

13 . A method for transmitting a bitstream generated by an image encoding device, wherein the image encoding device comprises one or more processing units configured to perform a method of encoding video data including:

deriving a plurality of variables associated with a coding unit, wherein the plurality of variables indicate a luma coding block size and a coding tree type;

determining a palette mode block size threshold for the coding unit in accordance with the coding tree type;

at least in accordance with a determination that the luma coding block size is greater than the palette mode block size threshold:

determining a palette mode enable flag associated with the coding unit; and

encoding the coding unit in accordance with the palette mode enable flag.

14 . The method according to claim 13 , wherein the encoding the coding unit in accordance with the palette mode enable flag comprises:

when the palette mode enable flag indicates that a palette mode is enabled for the coding unit:

determining a palette table for the coding unit;

and

encoding the coding unit using the palette table.

15 . The method according to claim 13 , wherein the determining the palette mode block size threshold for the coding unit in accordance with the coding tree type comprises:

when the coding tree type is SINGLE TREE or DUAL TREE LUMA:

setting the palette mode block size threshold to be 16; and

when the coding tree type is DUAL TREE CHROMA:

determining a chroma format for the coding unit; and

setting the palette mode block size threshold in accordance with a chroma format.

16 . The method according to claim 15 , wherein, when the chroma format is 4:4:4, the palette mode block size threshold is 16.

17 . The method according to claim 15 , wherein, when the chroma format is 4:2:2, the palette mode block size threshold is 32.

18 . The method according to claim 15 , wherein, when the chroma format is 4:2:0, the palette mode block size threshold is 64.

Assignments (1)

Continuity (4)

References Cited (31)

Cited By (1)

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