Motion vector prediction
A video coder may determine a motion vector of a non-adjacent block of a current picture of the video data. The non-adjacent block is non-adjacent to a current block of the current picture. Furthermore, the video coder determines, based on the motion vector of the non-adjacent block, a motion vector predictor (MVP) for the current block. The video coder may determine a motion vector of the current block. The video coder may also determine a predictive block based on the motion vector of the current block.
1. A method of decoding video data, the method comprising:
storing, by a video decoder, a plurality of non-adjacent motion vector predictor (MVP) candidates in a first-in, first-out (FIFO) buffer;
determining, by the video decoder, a motion vector of a non-adjacent block of a current picture of the video data, the non-adjacent block being non-adjacent to a current block of the current picture, wherein the plurality of non-adjacent MVP candidates include a non-adjacent MVP candidate specifying the motion vector of the non-adjacent block;
determining, by the video decoder, based on the motion vector of the non-adjacent block, a MVP for the current block;
determining, by the video decoder, based on the MVP for the current block, a motion vector of the current block;
determining, by the video decoder, a predictive block based on the motion vector of the current block;
reconstructing, by the video decoder, based on the predictive block, sample values of the current picture; and
updating, by the video decoder, the FIFO buffer to remove an earlier-added, non-adjacent MVP candidate from the FIFO buffer and to add a new MVP candidate to the FIFO buffer.
2. The method of claim 1 , wherein determining the MVP for the current block comprises:
generating, by the video decoder, based in part on the motion vector of the non-adjacent block, a list of MVP candidates, wherein the list of MVP candidates includes an MVP candidate that specifies the motion vector of the non-adjacent block; and
determining, by the video decoder, from among the MVP candidates in the list of MVP candidates, the MVP for the current block.
3. The method of claim 2 , wherein the non-adjacent block is a first non-adjacent block, the method further comprising:
ordering, by the video decoder, a plurality of non-adjacent spatial MVP (NA-SMVP) candidates in the list,
wherein, for each respective NA-SMVP candidate of the plurality of NA-SMVP candidates, the respective NA-SMVP candidate corresponds to a respective non-adjacent block of a plurality of non-adjacent blocks, the respective NA-SMVP specifying a motion vector of the respective non-adjacent block,
wherein the plurality of non-adjacent blocks includes the first non-adjacent block, and
wherein the plurality of NA-SMVP candidates are ordered in the list according to distance of corresponding non-adjacent blocks from the current block.
4. The method of claim 2 , wherein the non-adjacent block is a first non-adjacent block, the method further comprising:
determining, by the video decoder, a first plurality of non-adjacent spatial MVP (NA-SMVP) candidates,
wherein, for each respective NA-SMVP candidate of the first plurality of NA-SMVP candidates, the respective NA-SMVP candidate corresponds to a respective non-adjacent block of a plurality of non-adjacent blocks, the respective NA-SMVP specifying the motion vector of the respective non-adjacent block,
wherein the first plurality of non-adjacent blocks includes the first non-adjacent block; and
ordering, by the video decoder, a second plurality of non-adjacent spatial MVP (NA-SMVP) candidates in the list, the second plurality of NA-SMVP candidates comprising non-duplicative NA-SMVP candidates in the first plurality of NA-SMVP candidates,
wherein the second plurality of NA-SMVP candidates are ordered in the list according to a frequency with which motion vectors specified by the NA-SMVP candidates in the second plurality of NA-SMVP candidates are specified by NA-SMVP candidates in the first plurality of NA-SMVP candidates.
5. The method of claim 2 , further comprising applying, by the video decoder, a pruning process to the list, wherein the pruning process is adaptive to a block size of the current block.
6. The method of claim 1 , wherein the MVP for the current block is in affine mode.
7. The method of claim 1 , wherein determining the motion vector of the current block comprises:
determining, by the video decoder, the motion vector of the current block such that the motion vector of the current block specifies a motion vector of the MVP for the current block.
8. The method of claim 1 , wherein determining the motion vector of the current block comprises:
determining, by the video decoder, the motion vector of the current block such that the motion vector of the current block is equal to a motion vector of motion information of the MVP for the current block plus a motion vector difference (MVD).
9. The method of claim 1 , wherein the non-adjacent block is a block in a template that defines a fixed pattern of blocks relative to a position of the current block.
10. The method of claim 1 , further comprising:
determining, by the video decoder, a set of coding unit (CU)-level frame-rate up conversion (FRUC) motion vector candidates;
selecting, by the video decoder, a CU-level FRUC motion vector candidate from the set of CU-level FRUC motion vector candidates;
determining, by the video decoder, a CU-level motion vector at least in part by performing a local search starting from a selected CU-level FRUC motion vector candidate; and
refining, by the video decoder, the CU-level motion vector at a sub-CU level with a set of FRUC sub-CU level motion vector candidates,
wherein at least one of the set of CU-level FRUC motion vector candidates and the set of FRUC sub-CU level motion vector candidates includes a non-adjacent spatial motion vector predictor (NA-SMVP) that specifies the motion vector of the non-adjacent block.
11. The method of claim 1 , further comprising:
prior to determining the motion vector of the non-adjacent block and based on a distance between the non-adjacent block and the current block being greater than a threshold distance, modifying a position of the non-adjacent block.
12. The method of claim 11 , wherein modifying the position of the non-adjacent block comprises rounding a position of the non-adjacent block to a position on a first grid of blocks in the current picture coarser than a second grid of blocks in the current picture.
13. The method of claim 11 , wherein modifying the position of the non-adjacent block comprises clipping a position of the non-adjacent block to the distance threshold.
14. The method of claim 1 , further comprising:
prior to determining the motion vector of the non-adjacent block and based on a distance between the non-adjacent block and a current coding tree block being greater than a threshold distance, modifying a position of the non-adjacent block, the current coding tree block containing the current block.
15. A method of encoding video data, the method comprising:
storing, by a video encoder, a plurality of non-adjacent motion vector predictor (MVP) candidates in a first-in, first-out (FIFO) buffer;
determining, by the video encoder, a motion vector of a non-adjacent block of a current picture of the video data, the non-adjacent block being non-adjacent to a current block of the current picture, wherein the plurality of non-adjacent MVP candidates include a non-adjacent MVP candidate specifying the motion vector of the non-adjacent block;
determining, by the video encoder, based on the motion vector of the non-adjacent block, a MVP for the current block;
determining, by the video encoder, a motion vector of the current block, wherein the motion vector is equal to a motion vector of the MVP for the current block or is equal to the motion vector of the MVP for the current block plus a motion vector difference (MVD) signaled in a bitstream;
determining, by the video encoder, a predictive block based on the motion vector of the current block;
generating, by the video encoder, based on the predictive block, residual sample values; and
updating, by the video encoder, the FIFO buffer to remove an earlier-added, non-adjacent MVP candidate from the FIFO buffer and to add a new MVP candidate to the FIFO buffer.
16. The method of claim 15 , wherein determining the MVP for the current block comprises:
generating, by the video encoder, based in part on the motion vector of the non-adjacent block, a list of MVP candidates, wherein the list of MVP candidates includes an MVP candidate that specifies the motion vector of the non-adjacent block; and
determining, by the video encoder, from among the MVP candidates in the list of MVP candidates, the MVP for the current block.
17. The method of claim 16 , wherein the non-adjacent block is a first non-adjacent block, the method further comprising:
ordering, by the video encoder, a plurality of non-adjacent spatial MVP (NA-SMVP) candidates in the list,
wherein, for each respective NA-SMVP candidate of the plurality of NA-SMVP candidates, the respective NA-SMVP candidate corresponds to a respective non-adjacent block of a plurality of non-adjacent blocks, the respective NA-SMVP specifying a motion vector of the respective non-adjacent block,
wherein the plurality of non-adjacent blocks includes the first non-adjacent block, and
wherein the plurality of NA-SMVP candidates are ordered in the list according to distance of corresponding non-adjacent blocks from the current block.
18. The method of claim 16 , wherein the non-adjacent block is a first non-adjacent block, the method further comprising:
determining, by the video encoder, a first plurality of non-adjacent spatial MVP (NA-SMVP) candidates,
wherein, for each respective NA-SMVP candidate of the first plurality of NA-SMVP candidates, the respective NA-SMVP candidate corresponds to a respective non-adjacent block of a plurality of non-adjacent blocks, the respective NA-SMVP specifying a motion vector of the respective non-adjacent block,
wherein the first plurality of non-adjacent blocks includes the first non-adjacent block; and
including, by the video encoder, a second plurality of non-adjacent spatial MVP (NA-SMVP) candidates in the list, the second plurality of NA-SMVP candidates comprising non-duplicative NA-SMVP candidates in the first plurality of NA-SMVP candidates,
wherein the second plurality of NA-SMVP candidates are ordered in the list according to a frequency with which motion vectors specified by the NA-SMVP candidates in the second plurality of NA-SMVP candidates are specified by NA-SMVP candidates in the first plurality of NA-SMVP candidates.
19. The method of claim 16 , further comprising applying, by the video encoder, a pruning process to the list, wherein the pruning process is adaptive to a block size of the current block.
20. The method of claim 15 , wherein the MVP for the current block is in affine mode.
21. The method of claim 15 , wherein the non-adjacent block is a block in a template that defines a fixed pattern of blocks relative to a position of the current block.
22. The method of claim 15 , further comprising:
determining, by the video encoder, a set of coding unit (CU)-level frame-rate up conversion (FRUC) motion vector candidates;
selecting, by the video encoder, a CU-level FRUC motion vector candidate from the set of CU-level FRUC motion vector candidates;
determining, by the video encoder, a CU-level motion vector at least in part by performing a local search starting from a selected CU-level FRUC motion vector candidate; and
refining, by the video encoder, the CU-level motion vector at a sub-CU level with a set of FRUC sub-CU level motion vector candidates,
wherein at least one of the set of CU-level FRUC motion vector candidates and the set of FRUC sub-CU level motion vector candidates includes a non-adjacent spatial motion vector predictor (NA-SMVP) that specifies the motion vector of the non-adjacent block.
23. The method of claim 15 , further comprising:
prior to determining the motion vector of the non-adjacent block and based on a distance between the non-adjacent block and the current block being greater than a threshold distance, modifying a position of the non-adjacent block.
24. The method of claim 23 , wherein modifying the position of the non-adjacent block comprises rounding a position of the non-adjacent block to a position on a first grid of blocks in the current picture coarser than a second grid of blocks in the current picture.
25. The method of claim 23 , wherein modifying the position of the non-adjacent block comprises clipping a position of the non-adjacent block to the distance threshold.
26. The method of claim 15 , further comprising:
prior to determining the motion vector of the non-adjacent block and based on a distance between the non-adjacent block and a current coding tree block being greater than a threshold distance, modifying a position of the non-adjacent block, the current coding tree block containing the current block.
27. An apparatus for decoding video data, the apparatus comprising:
one or more storage media configured to store video data and a plurality of non-adjacent motion vector predictor (MVP) candidates in a first-in, first-out (FIFO) buffer; and
one or more processors configured to:
determine a motion vector of a non-adjacent block of a current picture of the video data, the non-adjacent block being non-adjacent to a current block of the current picture, wherein the plurality of non-adjacent MVP candidates include a non-adjacent MVP candidate specifying the motion vector of the non-adjacent block;
determine, based on the motion vector of the non-adjacent block, a MVP for the current block;
determine, based on the MVP for the current block, a motion vector of the current block;
determine a predictive block based on the motion vector of the current block;
reconstruct, based on the predictive block, sample values of the current picture; and
update the FIFO buffer to remove an earlier-added, non-adjacent MVP candidate from the FIFO buffer and to add a new MVP candidate to the FIFO buffer.
28. The apparatus of claim 27 , wherein the one or more processors are configured such that, as part of determining the MVP for the current block, the one or more processors:
generate, based in part on the motion vector of the non-adjacent block, a list of MVP candidates, wherein the list of MVP candidates includes an MVP candidate that specifies the motion vector of the non-adjacent block; and
determine, from among the MVP candidates in the list of MVP candidates, the MVP for the current block.
29. The apparatus of claim 28 , wherein the non-adjacent block is a first non-adjacent block, the one or more processors are further configured to:
order a plurality of non-adjacent spatial MVP (NA-SMVP) candidates in the list,
wherein, for each respective NA-SMVP candidate of the plurality of NA-SMVP candidates, the respective NA-SMVP candidate corresponds to a respective non-adjacent block of a plurality of non-adjacent blocks, the respective NA-SMVP specifying a motion vector of the respective non-adjacent block,
wherein the plurality of non-adjacent blocks includes the first non-adjacent block, and
wherein the plurality of NA-SMVP candidates are ordered in the list according to distance of corresponding non-adjacent blocks from the current block.
30. The apparatus of claim 28 , wherein the non-adjacent block is a first non-adjacent block, the one or more processors are further configured to:
determine a first plurality of non-adjacent spatial MVP (NA-SMVP) candidates,
wherein, for each respective NA-SMVP candidate of the first plurality of NA-SMVP candidates, the respective NA-SMVP candidate corresponds to a respective non-adjacent block of a plurality of non-adjacent blocks, the respective NA-SMVP specifying the motion vector of the respective non-adjacent block,
wherein the first plurality of non-adjacent blocks includes the first non-adjacent block; and
order a second plurality of non-adjacent spatial MVP (NA-SMVP) candidates in the list, the second plurality of NA-SMVP candidates comprising non-duplicative NA-SMVP candidates in the first plurality of NA-SMVP candidates,
wherein the second plurality of NA-SMVP candidates are ordered in the list according to a frequency with which motion vector specified by the NA-SMVP candidates in the second plurality of NA-SMVP candidates are specified by NA-SMVP candidates in the first plurality of NA-SMVP candidates.
31. The apparatus of claim 28 , wherein the one or more processors are further configured to apply a pruning process to the list, wherein the pruning process is adaptive to a block size of the current block.
32. The apparatus of claim 27 , wherein the MVP for the current block is in affine mode.
33. The apparatus of claim 27 , wherein the one or more processors are configured such that, as part of determining the motion vector of the current block, the one or more processors:
determine the motion vector of the current block such that the motion vector of the current block specifies a motion vector of the MVP candidate for the current block.
34. The apparatus of claim 27 , wherein the one or more processors are configured such that, as part of determining the motion vector of the current block, the one or more processors:
determine the motion vector of the current block such that the motion vector of the current block is equal to a motion vector of motion information of the MVP for the current block.
35. The apparatus of claim 27 , wherein the non-adjacent block is a block in a template that defines a fixed pattern of blocks relative to a position of the current block.
36. The apparatus of claim 27 , wherein the one or more processors are further configured to:
determine a set of coding unit (CU)-level frame-rate up conversion (FRUC) motion vector candidates;
select a CU-level FRUC motion vector candidate from the set of CU-level FRUC motion vector candidates;
determine a CU-level motion vector at least in part by performing a local search starting from a selected CU-level FRUC motion vector candidate; and
refine the CU-level motion vector at a sub-CU level with a set of FRUC sub-CU level motion vector candidates,
wherein at least one of the set of CU-level FRUC motion vector candidates and the set of FRUC sub-CU level motion vector candidates includes a non-adjacent spatial motion vector predictor (NA-SMVP) that specifies the motion vector of the non-adjacent block.
37. The apparatus of claim 27 , wherein the one or more processors are configured to:
prior to determining the motion vector of the non-adjacent block and based on a distance between the non-adjacent block and the current block being greater than a threshold distance, modify a position of the non-adjacent block.
38. The apparatus of claim 37 , wherein the one or more processors are configured such that, as part of modifying the position of the non-adjacent block, the one or more processors round a position of the non-adjacent block to a position on a first grid of blocks in the current picture coarser than a second grid of blocks in the current picture.
39. The apparatus of claim 37 , wherein the one or more processors are configured such that, as part of modifying the position of the non-adjacent block, the one or more processors clip a position of the non-adjacent block to the distance threshold.
40. The apparatus of claim 27 , wherein the one or more processors are configured to:
prior to determining the motion vector of the non-adjacent block and based on a distance between the non-adjacent block and a current coding tree block being greater than a threshold distance, modify a position of the non-adjacent block, the current coding tree block containing the current block.
41. The apparatus of claim 27 , wherein the apparatus comprises:
an integrated circuit,
a microprocessor, or
a wireless communication device.
42. An apparatus for encoding video data, the apparatus comprising:
one or more storage media configured to store video data and a plurality of non-adjacent motion vector predictor (MVP) candidates in a first-in, first-out (FIFO) buffer; and
one or more processors configured to:
determine a motion vector of a non-adjacent block of a current picture of the video data, the non-adjacent block being non-adjacent to a current block of the current picture, wherein the plurality of non-adjacent MVP candidates include a non-adjacent MVP candidate specifying the motion vector of the non-adjacent block;
determine, based on the motion vector of the non-adjacent block, a MVP for the current block;
determine a motion vector of the current block, wherein the motion vector is equal to a motion vector of the MVP for the current block or is equal to the motion vector of the MVP for the current block plus a motion vector difference (MVD) signaled in a bitstream;
determine a predictive block based on the motion vector of the current block;
generate, based on the predictive block, residual sample values; and
update the FIFO buffer to remove an earlier-added, non-adjacent MVP candidate from the FIFO buffer and to add a new MVP candidate to the FIFO buffer.
43. The apparatus of claim 42 , wherein the one or more processors are configured such that, as part of determining the MVP for the current block, the one or more processors:
generate, based in part on the motion vector of the non-adjacent block, a list of MVP candidates, wherein the list of MVP candidates includes an MVP candidate that specifies the motion vector of the non-adjacent block; and
determine, from among the MVP candidates in the list of MVP candidates, the MVP for the current block.
44. The apparatus of claim 43 , wherein the non-adjacent block is a first non-adjacent block, the one or more processors are further configured to:
order a plurality of non-adjacent spatial MVP (NA-SMVP) candidates in the list,
wherein, for each respective NA-SMVP candidate of the plurality of NA-SMVP candidates, the respective NA-SMVP candidate corresponds to a respective non-adjacent block of a plurality of non-adjacent blocks, the respective NA-SMVP specifying a motion vector of the respective non-adjacent block,
wherein the plurality of non-adjacent blocks includes the first non-adjacent block, and
wherein the plurality of NA-SMVP candidates are ordered in the list according to distance of corresponding non-adjacent blocks from the current block.
45. The apparatus of claim 44 , wherein the non-adjacent block is a first non-adjacent block, the one or more processors are further configured to:
determine a first plurality of non-adjacent spatial MVP (NA-SMVP) candidates,
wherein, for each respective NA-SMVP candidate of the first plurality of NA-SMVP candidates, the respective NA-SMVP candidate corresponds to a respective non-adjacent block of a plurality of non-adjacent blocks, the respective NA-SMVP specifying a motion vector of the respective non-adjacent block,
wherein the first plurality of non-adjacent blocks includes the first non-adjacent block; and
include a second plurality of non-adjacent spatial MVP (NA-SMVP) candidates in the list, the second plurality of NA-SMVP candidates comprising non-duplicative NA-SMVP candidates in the first plurality of NA-SMVP candidates,
wherein the second plurality of NA-SMVP candidates are ordered in the list according to a frequency with which motion vectors specified by the NA-SMVP candidates in the second plurality of NA-SMVP candidates are specified by NA-SMVP candidates in the first plurality of NA-SMVP candidates.
46. The apparatus of claim 43 , wherein the one or more processors are further configured to apply a pruning process to the list, wherein the pruning process is adaptive to a block size of the current block.
47. The apparatus of claim 42 , wherein the MVP for the current block is in affine mode.
48. The apparatus of claim 42 , wherein the non-adjacent block is a block in a template that defines a fixed pattern of blocks relative to a position of the current block.
49. The apparatus of claim 42 , wherein the one or more processors are further configured to:
determine a set of coding unit (CU)-level frame-rate up conversion (FRUC) motion vector candidates;
select a CU-level FRUC motion vector candidate from the set of CU-level FRUC motion vector candidates;
determine a CU-level motion vector at least in part by performing a local search starting from a selected CU-level FRUC motion vector candidate; and
refine the CU-level motion vector at a sub-CU level with a set of FRUC sub-CU level motion vector candidates,
wherein at least one of the set of CU-level FRUC motion vector candidates and the set of FRUC sub-CU level motion vector candidates includes a non-adjacent spatial motion vector predictor (NA-SMVP) that specifies the motion vector of the non-adjacent block.
50. The apparatus of claim 42 , wherein the one or more processors are configured to:
prior to determining the motion vector of the non-adjacent block and based on a distance between the non-adjacent block and the current block being greater than a threshold distance, modify a position of the non-adjacent block.
51. The apparatus of claim 50 , wherein the one or more processors are configured such that, as part of modifying the position of the non-adjacent block, the one or more processors round a position of the non-adjacent block to a position on a first grid of blocks in the current picture coarser than a second grid of blocks in the current picture.
52. The apparatus of claim 50 , wherein the one or more processors are configured such that, as part of modifying the position of the non-adjacent block, the one or more processors clip a position of the non-adjacent block to the distance threshold.
53. The apparatus of claim 42 , wherein the one or more processors are configured to:
prior to determining the motion vector of the non-adjacent block and based on a distance between the non-adjacent block and a current coding tree block being greater than a threshold distance, modify a position of the non-adjacent block, the current coding tree block containing the current block.
54. The apparatus of claim 42 , wherein the apparatus comprises:
an integrated circuit,
a microprocessor, or
a wireless communication device.
55. An apparatus for decoding video data, the apparatus comprising:
means for storing a plurality of non-adjacent motion vector predictor (MVP) candidates in a first-in, first-out (FIFO) buffer;
means for determining a motion vector of a non-adjacent block of a current picture of the video data, the non-adjacent block being non-adjacent to a current block of the current picture;
means for determining, based on the motion vector of the non-adjacent block, a MVP for the current block, wherein the plurality of non-adjacent MVP candidates include a non-adjacent MVP candidate specifying the motion vector of the non-adjacent block;
means for determining, based on the MVP for the current block, a motion vector of the current block;
means for determining a predictive block based on the motion vector of the current block;
means for reconstructing, based on the predictive block, sample values of the current picture; and
means for updating the FIFO buffer to remove an earlier-added, non-adjacent MVP candidate from the FIFO buffer and to add a new MVP candidate to the FIFO buffer.
56. An apparatus for encoding video data, the apparatus comprising:
means for storing a plurality of non-adjacent motion vector predictor (MVP) candidates in a first-in, first-out (FIFO) buffer;
means for determining a motion vector of a non-adjacent block of a current picture of the video data, the non-adjacent block being non-adjacent to a current block of the current picture, wherein the plurality of non-adjacent MVP candidates include a non-adjacent MVP candidate specifying the motion vector of the non-adjacent block;
means for determining, based on the motion vector of the non-adjacent block, a MVP for the current block;
means for determining a motion vector of the current block, wherein the motion vector is equal to a motion vector of the MVP for the current block or is equal to the motion vector of the MVP for the current block plus a motion vector difference (MVD) signaled in a bitstream;
means for determining a predictive block based on the motion vector of the current block;
means for generating, based on the predictive block, residual sample values; and
means for updating, by the video decoder, the FIFO buffer to remove an earlier-added, non-adjacent MVP candidate from the FIFO buffer and to add a new MVP candidate to the FIFO buffer.
57. A non-transitory computer-readable storage medium storing instructions that, when executed, cause one or more processors to:
store a plurality of non-adjacent motion vector predictor (MVP) candidates in a first-in, first-out (FIFO) buffer;
determine a motion vector of a non-adjacent block of a current picture of the video data, the non-adjacent block being non-adjacent to a current block of the current picture, wherein the plurality of non-adjacent MVP candidates include a non-adjacent MVP candidate specifying the motion vector of the non-adjacent block;
determine, based on the motion vector of the non-adjacent block, a MVP for the current block;
determine, based on the MVP for the current block, a motion vector of the current block;
determine a predictive block based on the motion vector of the current block;
reconstruct, based on the predictive block, sample values of the current picture; and
update the FIFO buffer to remove an earliest-added non-adjacent MVP candidate from the FIFO buffer and add a new MVP candidate to the FIFO buffer.
58. A non-transitory computer-readable storage medium storing instructions that, when executed, cause one or more processors to:
store a plurality of non-adjacent motion vector predictor (MVP) candidates in a first-in, first-out (FIFO) buffer;
determine a motion vector of a non-adjacent block of a current picture of the video data, the non-adjacent block being non-adjacent to a current block of the current picture, wherein the plurality of non-adjacent MVP candidates include a non-adjacent MVP candidate specifying the motion vector of the non-adjacent block;
determine, based on the motion vector of the non-adjacent block, a MVP for the current block;
determine a motion vector of the current block, wherein the motion vector is equal to a motion vector of the MVP for the current block or is equal to the motion vector of the MVP for the current block plus a motion vector difference (MVD) signaled in a bitstream;
determine a predictive block based on the motion vector of the current block;
generate, based on the predictive block, residual sample values; and
update the FIFO buffer to remove an earlier-added, non-adjacent MVP candidate from the FIFO buffer and add a new MVP candidate to the FIFO buffer.