Granted Patent B2

US 12,407,814 · App. 18/608,642 · Granted Sep 2, 2025

Inventors: Suhong Wang (Shenzhen, CN); Xiaozhen Zheng (Shenzhen, CN); Shanshe Wang (Shenzhen, CN); Siwei Ma (Shenzhen, CN)

Assignee: SZ DJI TECHNOLOGY CO., LTD.

H04N19/105H04N19/129H04N19/137H04N19/176H04N19/1883H04N19/52

Abstract

Claims (64)

1. A bitstreams generating method comprising:

obtaining a historical motion information candidate list, wherein the historical motion information candidate list is used for encoding each of a plurality of image blocks included in a region of a current frame; and

encoding the plurality of image blocks according to the historical motion information candidate list, wherein:

the historical motion information candidate list is a history-based motion vector prediction (HMVP) candidate list;

during the process of encoding all the plurality of image blocks included in the region, the historical motion information candidate list is not updated;

only the motion information of the last image block in the region is used to update the historical motion information candidate list after the encoding process of the last image block is finished; and

the historical motion information candidate list is updated by:

deleting candidate historical motion information at a second position in the historical motion information candidate list, the second position being a position in the historical motion information candidate list that is farthest to a first position in the historical motion information candidate list, and the first position is a position in the historical motion information candidate list that is first selected for constructing a motion information list; or

deleting candidate historical motion information that is same as candidate historical motion information at a first position, and the first position is a position in the historical motion information candidate list that is first selected for constructing a motion information list; and

generating bitstreams, the bitstreams including one or more indexes of motion information.

2. The method of claim 1 , wherein the same historical motion information candidate list is used for encoding all the plurality of image blocks included in the region, wherein the used same historical motion information candidate list includes the same motion information and does not include the motion information of all the plurality of image blocks included in the region.

3. The method of claim 1 , wherein:

a size of the region is equal to 16×16 pixels; and

the plurality of image blocks include 4×4 image blocks obtained by dividing the region according to a quadtree method.

4. The method of claim 1 , wherein the historical motion information candidate list is updated by adding new candidate historical motion information to a position in the historical motion information candidate list that is first selected for using in a process of constructing a motion information list, the motion information list being constructed based on the historical motion information candidate list.

5. The method according to claim 1 , wherein:

candidate historical motion information in the historical motion information candidate list adopted to perform the prediction for different ones of the plurality of image blocks has a same order as candidate historical motion information in the historical motion information candidate list.

6. The method of claim 1 , wherein:

the region is a first region and the plurality of image blocks are a plurality of first image blocks; and

the historical motion information candidate list is obtained based on motion information of one or more second image blocks each being an encoded or decoded image block in a second region of the current frame outside the first region.

7. The method according to claim 6 , wherein obtaining the historical motion information candidate list includes:

updating the historical motion information candidate list using the motion information of at least one of the one or more second image blocks, including:

updating the historical motion information candidate list according to the motion information of a last second image block, of the one or more second image blocks, in the second region that was encoded or decoded, a lower right corner of the last second image block in the second region that was encoded or decoded coinciding with a lower right corner of the second region.

8. The method according to claim 7 , wherein updating the historical motion information candidate list further includes:

adding first candidate historical motion information to the first position.

9. The method according to claim 7 , wherein when the historical motion information candidate list is updated:

a number of pieces of candidate historical motion information added to the historical motion information candidate list is smaller than a first preset value; and/or

a number of pieces of candidate historical motion information deleted from the historical motion information candidate list is smaller than a second preset value.

10. The method according to claim 6 , wherein:

the first region and the second region belong to a same coding tree unit (CTU) row or a same CTU column;

the CTU row or the CTU column includes at least one CTU; and

each of the at least one CTU includes at least one region; and

the second region is a region that is encoded before the first region.

11. The method according to claim 6 , wherein during the process of encoding all the plurality of image blocks included in the region:

the historical motion information candidate list does not include the motion information of all the plurality of image blocks included in the region; or

the same historical motion information candidate list is used.

12. A device comprising:

at least one memory storing instructions; and

at least one processor configured to execute the instructions to:

obtain a historical motion information candidate list, wherein the historical motion information candidate list is used for encoding each of a plurality of image blocks included in a region of a current frame; and

encode the plurality of image blocks according to the historical motion information candidate list, wherein:

the historical motion information candidate list is a history-based motion vector prediction (HMVP) candidate list;

during the process of encoding all the plurality of image blocks included in the region, the historical motion information candidate list is not updated;

only the motion information of the last image block in the region is used to update the historical motion information candidate list after the encoding process of the last image block is finished; and

the historical motion information candidate list is updated by:

deleting candidate historical motion information at a second position in the historical motion information candidate list, the second position being a position in the historical motion information candidate list that is farthest to a first position in the historical motion information candidate list, and the first position is a position in the historical motion information candidate list that is first selected for constructing a motion information list; or

deleting candidate historical motion information that is same as candidate historical motion information at a first position, and the first position is a position in the historical motion information candidate list that is first selected for constructing a motion information list.

13. The device of claim 12 , wherein:

the region is a first region and the plurality of image blocks are a plurality of first image blocks;

the current frame includes a second region that is encoded before the first region and includes one or more second image blocks; and

obtain the historical motion information candidate list includes:

update the historical motion information candidate list according to the motion information of a last second image block of the one or more second image blocks, a lower right corner of the last second image block in the second region coinciding with a lower right corner of the second region.

14. The device of claim 12 , wherein during the process of encoding all the plurality of image blocks included in the region:

the historical motion information candidate list does not include the motion information of all the plurality of image blocks included in the region; or

the same historical motion information candidate list is used.

15. A device comprising: at least one memory storing instructions; and at least one processor configured to execute the instructions to: obtain a historical motion information candidate list, wherein the historical motion information candidate list is used for encoding each of a plurality of image blocks included in a region of a current frame; and decode the plurality of image blocks according to the historical motion information candidate list, wherein: the historical motion information candidate list is a history-based motion vector prediction (HMVP) candidate list; during the process of decoding all the plurality of image blocks included in the region, the historical motion information candidate list is not updated only the motion information of the last image block in the region is used to update the historical motion information candidate list after the decoding process of the last image block is finished; and the historical motion information candidate list is updated by deleting candidate historical motion information at a second position in the historical motion information candidate list, the second position being a position in the historical motion information candidate list that is farthest to a first position in the historical motion information candidate list, and the first position is a position in the historical motion information candidate list that is first selected for constructing a motion information list; or deleting candidate historical motion information that is same as candidate historical motion information at a first position, and the first position is a position in the historical motion information candidate list that is first selected for constructing a motion information list.

16. The device of claim 15 , wherein the same historical motion information candidate list is used for decoding all the plurality of first image blocks included in the first region, and the same historical motion information candidate list includes the same motion information.

17. The device of claim 15 , wherein the historical motion information candidate list is obtained by:

updating the historical motion information candidate list according to the motion information of a last second image block of the one or more second image blocks that have been encoded or decoded, a lower right corner of the last second image block in the second region coinciding with a lower right corner of the second region.

18. The device of claim 15 , wherein the historical motion information candidate list is updated further by:

adding first candidate historical motion information to the first position.

19. The device of claim 15 , wherein during the process of decoding all the plurality of image blocks included in the region:

the historical motion information candidate list does not include the motion information of all the plurality of image blocks included in the region; or

the same historical motion information candidate list is used.

Priority Claims (1)

Continuity (3)

References Cited (67)