Patent ID: 11936861
Assignee: HUAWEI TECHNOLOGIES CO., LTD.
Field: Audio-visual technology (Electrical engineering)
Classification: CPC H | IPC H

Claim 10:
11. The decoding apparatus according to claim 8, wherein:
responsive to determining that N=4, M=4, and the basic split mode is a horizontal quad split mode, the candidate derivation mode set comprises a first preset derivation mode, a second preset derivation mode, a third preset derivation mode, and a fourth preset derivation mode, wherein the first preset derivation mode is to derive one derived picture block from a first subpicture block, a second subpicture block, and a third subpicture block; the second preset derivation mode is to derive one derived picture block from the third subpicture block and a fourth subpicture block; the third preset derivation mode is to derive one derived picture block from the second subpicture block and the third subpicture block; the fourth preset derivation mode is to derive one derived picture block from the first subpicture block and the second subpicture block and derive another derived picture block from the third subpicture block and the fourth subpicture block; and the first subpicture block, the second subpicture block, the third subpicture block, and the fourth subpicture block are sequentially arranged in the current to-be-decoded picture block from top to bottom;
responsive to determining that N=4, M=4, and the basic split mode is a vertical quad split mode, the candidate derivation mode set comprises a fifth preset derivation mode, a sixth preset derivation mode, a seventh preset derivation mode, and an eighth preset derivation mode, wherein the fifth preset derivation mode is to derive one derived picture block from a fifth subpicture block, a sixth subpicture block, and a seventh subpicture block; the sixth preset derivation mode is to derive one derived picture block from the sixth subpicture block, the seventh subpicture block, and an eighth subpicture block; the seventh preset derivation mode is to derive one derived picture block from the sixth subpicture block and the seventh subpicture block; the eighth preset derivation mode is to keep the fifth subpicture block, the sixth subpicture block, the seventh subpicture block, and the eighth subpicture block independent of each other; and the fifth subpicture block, the sixth subpicture block, the seventh subpicture block, and the eighth subpicture block are sequentially arranged in the current to-be-decoded picture block from left to right; or
responsive to determining that N=4, M=4, and the basic split mode is a horizontal and vertical quad split mode, the candidate derivation mode set comprises a ninth preset derivation mode, a tenth preset derivation mode, an eleventh preset derivation mode, and a twelfth preset derivation mode, wherein the ninth preset derivation mode is to derive one derived picture block from a ninth subpicture block and a tenth subpicture block; the tenth preset derivation mode is to derive one derived picture block from the ninth subpicture block and the tenth subpicture block and derive another derived picture block from an eleventh subpicture block and a twelfth subpicture block; the eleventh preset derivation mode is to derive one derived picture block from the tenth subpicture block and the eleventh subpicture block and derive another derived picture block from the ninth subpicture block and the twelfth subpicture block; the twelfth preset derivation mode is to derive one derived picture block from the ninth subpicture block and the twelfth subpicture block; and the ninth subpicture block, the tenth subpicture block, the eleventh subpicture block, and the twelfth subpicture block are sequentially arranged clockwise in the current to-be-decoded picture block.