Video image processing method and device
A video image processing method includes determining a current image block and, in response to a size of the current image block meeting a preset condition, determining a temporal candidate motion vector of the current image block according to at least one of a temporal motion vector prediction (TMVP) operation or an advanced/alternative temporal motion vector prediction (ATMVP) operation.
1. A video image processing method comprising:
determining a current image block; and
during a process of determining a temporal candidate motion vector of the current image block:
turning off temporal motion vector prediction (TMVP) operation in response to a number of pixels of the current image block being smaller than or equal to 32; and
turning off advanced/alternative temporal motion vector prediction (ATMVP) operation in response to a width of the current image block being smaller than 8 pixels or a height of the current image block being smaller than 8 pixels;
wherein the TMVP operation includes:
determining a relevant block of the current image block in a temporal neighboring image; and
determining the temporal candidate motion vector of the current image block according to a motion vector of the relevant block; and
wherein the ATMVP operation includes:
determining the relevant block of the current image block in the temporal neighboring image;
dividing the current image block into a plurality of sub-blocks, a size of each of the sub-blocks being 8 pixels×8 pixels;
for each of the sub-blocks, determining a corresponding relevant sub-block in the relevant block, a size of each of the relevant sub-blocks being 8 pixels×8 pixels; and
determining temporal candidate motion vectors of the sub-blocks of the current image block according to motion vectors of the relevant sub-blocks corresponding to the sub-blocks.
2. The video image processing method of claim 1 , wherein:
the temporal neighboring image includes a co-located frame of the current image block; and
the relevant block of the current image block includes a co-located block of the current image block.
3. The video image processing method of claim 1 , wherein determining the relevant block of the current image block in the temporal neighboring image in at least one of the TMVP operation or the ATMVP operation includes:
determining an image block at a same position in the temporal neighboring image as a specified position in a current image containing the current image block to be the relevant block of the current image block.
4. The video image processing method of claim 3 , wherein the specified position includes a position at an upper left, an upper right, a lower left, or a lower right of the current image block.
5. The video image processing method of claim 1 , wherein determining the relevant block of the current image block in the temporal neighboring image in at least one of the TMVP operation or the ATMVP operation includes:
determining an image block at a same position in the temporal neighboring image as a specified position spatially neighboring to the current image block to be the relevant block of the current image block.
6. The video image processing method of claim 5 , wherein the specified position spatially neighboring to the current image block includes a specified position in a current image containing the current image block and outside the current image block.
7. An encoder comprising:
a memory storing program instructions; and
a processor configured to execute the program instructions to:
determine a current image block; and
during a process of determining a temporal candidate motion vector of the current image block:
turn off temporal motion vector prediction (TMVP) operation in response to a number of pixels of the current image block being smaller than or equal to 32; and
turn off advanced/alternative temporal motion vector prediction (ATMVP) operation in response to a width of the current image block being smaller than 8 pixels or a height of the current image block being smaller than 8 pixels;
wherein the TMVP operation includes:
determining a relevant block of the current image block in a temporal neighboring image; and
determining the temporal candidate motion vector of the current image block according to a motion vector of the relevant block; and
wherein the ATMVP operation includes:
determining the relevant block of the current image block in the temporal neighboring image;
dividing the current image block into a plurality of sub-blocks, a size of each of the sub-blocks being 8 pixels×8 pixels;
for each of the sub-blocks, determining a corresponding relevant sub-block in the relevant block, a size of each of the relevant sub-blocks being 8 pixels×8 pixels; and
determining temporal candidate motion vectors of the sub-blocks of the current image block according to motion vectors of the relevant sub-blocks corresponding to the sub-blocks.
8. The encoder of claim 7 , wherein:
the temporal neighboring image includes a co-located frame of the current image block; and
the relevant block of the current image block includes a co-located block of the current image block.
9. The encoder of claim 7 , wherein determining the relevant block of the current image block in the temporal neighboring image in at least one of the TMVP operation or the ATMVP operation includes:
determining an image block at a same position in the temporal neighboring image as a specified position in a current image containing the current image block to be the relevant block of the current image block.
10. The encoder of claim 9 , wherein the specified position includes a position at an upper left, an upper right, a lower left, or a lower right of the current image block.
11. The encoder of claim 7 , wherein determining the relevant block of the current image block in the temporal neighboring image in at least one of the TMVP operation or the ATMVP operation includes:
determining an image block at a same position in the temporal neighboring image as a specified position spatially neighboring to the current image block to be the relevant block of the current image block.
12. The encoder of claim 11 , wherein the specified position spatially neighboring to the current image block includes a specified position in a current image containing the current image block and outside the current image block.
13. A decoder comprising:
a memory storing program instructions; and
a processor configured to execute the program instructions to:
determine a current image block; and
during a process of determining a temporal candidate motion vector of the current image block:
turn off temporal motion vector prediction (TMVP) operation in response to a number of pixels of the current image block being smaller than or equal to 32; and
turn off advanced/alternative temporal motion vector prediction (ATMVP) operation in response to a width of the current image block being smaller than 8 pixels or a height of the current image block being smaller than 8 pixels;
wherein the TMVP operation includes:
determining a relevant block of the current image block in a temporal neighboring image; and
determining the temporal candidate motion vector of the current image block according to a motion vector of the relevant block; and
wherein the ATMVP operation includes:
determining the relevant block of the current image block in the temporal neighboring image;
dividing the current image block into a plurality of sub-blocks, a size of each of the sub-blocks being 8 pixels×8 pixels;
for each of the sub-blocks, determining a corresponding relevant sub-block in the relevant block, a size of each of the relevant sub-blocks being 8 pixels×8 pixels; and
determining temporal candidate motion vectors of the sub-blocks of the current image block according to motion vectors of the relevant sub-blocks corresponding to the sub-blocks.
14. The decoder of claim 13 , wherein:
the temporal neighboring image includes a co-located frame of the current image block; and
the relevant block of the current image block includes a co-located block of the current image block.
15. The decoder of claim 13 , wherein determining the relevant block of the current image block in the temporal neighboring image in at least one of the TMVP operation or the ATMVP operation includes:
determining an image block at a same position in the temporal neighboring image as a specified position in a current image containing the current image block to be the relevant block of the current image block.
16. The decoder of claim 15 , wherein the specified position in the current image block includes a position at an upper left, an upper right, a lower left, or a lower right of the current image block.
17. The decoder of claim 13 , wherein determining the relevant block of the current image block in the temporal neighboring image in at least one of the TMVP operation or the ATMVP operation includes:
determining an image block at a same position in the temporal neighboring image as a specified position spatially neighboring to the current image block to be the relevant block of the current image block.
18. The decoder of claim 17 , wherein the specified position spatially neighboring to the current image block includes a specified position in a current image containing the current image block and outside the current image block.