Merge candidates for motion vector prediction for video coding

1. A method of decoding video data, the method comprising:

receiving a current block of video data encoded with an inter prediction mode;

analyzing a plurality of neighboring blocks relative to the current block to determine whether any neighboring blocks among the plurality of neighboring blocks include motion information, wherein a number of the neighboring blocks analyzed among the plurality of neighboring blocks is greater than 5;

determining a plurality of weights, wherein each weight among the plurality of weights respectively corresponds to motion information included within a set of neighboring blocks, among the plurality of neighboring blocks, that include motion information;

constructing a motion vector candidate list for the current block of video data based on the motion information from the set of neighboring blocks relative to the current block;

adaptively ordering motion vector candidates within the constructed motion vector candidate list for the current block of video data based on the plurality of weights;

determining a current motion vector from the motion vector candidates within the motion vector candidate list; and

decoding the current block of video data using the current motion vector.

2. The method of claim 1 , wherein determining the plurality of weights comprises determining at least one weight of the plurality of weights based on a number pixels belonging to the neighboring block that includes the corresponding motion information.

3. The method of claim 1 , wherein at least one weight of the plurality of weights is proportional to a size the neighboring block that includes the corresponding motion information.

4. The method of claim 1 , wherein adaptively ordering the motion vector candidates within the constructed motion vector candidate list comprises:

updating at least one weight of the plurality of weights; and

sorting an order of the motion vector candidates within the constructed motion vector candidate list based on the updated at least one weight of the plurality of weights.

5. The method of claim 4 , wherein sorting the order of the motion vector candidates within the constructed motion vector candidate list comprises placing a first motion information corresponding to a higher value of weight before a second motion information corresponding to a lower value of weight in the constructed motion vector candidate list.

6. The method of claim 1 , wherein determining the plurality of weights comprises determining each of the plurality of weights based on a number of pixels adjacent to the current block.

7. The method of claim 1 , wherein the inter prediction mode corresponds to a merge mode.

8. An apparatus configured to decode video data, the apparatus comprising:

a memory configured to store a current block of video data; and

one or more processors configured to:

receive a current block of video data encoded with an inter prediction mode;

analyze a plurality of neighboring blocks relative to the current block to determine whether any neighboring blocks among the plurality of neighboring blocks include motion information, wherein a number of the neighboring blocks analyzed among the plurality of neighboring blocks is greater than 5;

determine a plurality of weights, wherein each weight among the plurality of weights respectively corresponds to motion information included within a set of neighboring blocks, among the plurality of neighboring blocks, that include motion information;

construct a motion vector candidate list for the current block of video data based on the motion information from the set of neighboring blocks relative to the current block;

adaptively order motion vector candidates within the constructed motion vector candidate list for the current block of video data based on the plurality of weights;

determine a current motion vector from the motion vector candidates within the motion vector candidate list; and

decode the current block of video data using the current motion vector.

9. The apparatus of claim 8 , wherein the one or more processors are further configured to determine at least one weight of the plurality of weights based on a number pixels belonging to the neighboring block that includes the corresponding motion information.

10. The apparatus of claim 8 , wherein at least one weight of the plurality of weights is proportional to a size the neighboring block that includes the corresponding motion information.

11. The apparatus of claim 8 , wherein, to adaptively order the motion vector candidates within the constructed motion vector candidate list, the one or more processors are further configured to:

update at least one weight of the plurality of weights; and

sort an order of the motion vector candidates within the constructed motion vector candidate list based on the updated at least one weight of the plurality of weights.

12. The apparatus of claim 11 , wherein, to sort the order of the motion vector candidates within the constructed motion vector candidate list, the one or more processors are further configured to place a first motion information corresponding to a higher value of weight before a second motion information corresponding to a lower value of weight in the constructed motion vector candidate list.

13. The apparatus of claim 8 , wherein the one or more processors are further configured to determine each of the plurality of weights based on a number of pixels adjacent to the current block.

14. The apparatus of claim 8 , wherein the inter prediction mode corresponds to a merge mode.

15. An apparatus configured to encode video data, the apparatus comprising:

a memory configured to store a current block of video data; and

one or more processors configured to:

receive a current block of video data encoded with an inter prediction mode;

analyze a plurality of neighboring blocks relative to the current block to determine whether any neighboring blocks among the plurality of neighboring blocks include motion information, wherein a number of the neighboring blocks analyzed among the plurality of neighboring blocks is greater than 5;

determine a plurality of weights, wherein each weight among the plurality of weights respectively corresponds to motion information included within a set of neighboring blocks, among the plurality of neighboring blocks, that include motion information;

construct a motion vector candidate list for the current block of video data based on the motion information from the set of neighboring blocks relative to the current block;

adaptively order motion vector candidates within the constructed motion vector candidate list for the current block of video data based on the plurality of weights;

determine a current motion vector from the motion vector candidates within the motion vector candidate list; and

encode the current block of video data using the current motion vector.

16. The apparatus of claim 15 , wherein the one or more processors are further configured to determine at least one weight of the plurality of weights based on a number pixels belonging to the neighboring block that includes the corresponding motion information.

17. The apparatus of claim 15 , wherein at least one weight of the plurality of weights is proportional to a size the neighboring block that includes the corresponding motion information.

18. The apparatus of claim 15 , wherein, to adaptively order the motion vector candidates within the constructed motion vector candidate list, the one or more processors are further configured to:

update at least one weight of the plurality of weights; and

sort an order of the motion vector candidates within the constructed motion vector candidate list based on the updated at least one weight of the plurality of weights.

19. The apparatus of claim 18 , wherein, to sort the order of the motion vector candidates within the constructed motion vector candidate list, the one or more processors are further configured to place a first motion information corresponding to a higher value of weight before a second motion information corresponding to a lower value of weight in the constructed motion vector candidate list.

20. The apparatus of claim 15 , wherein the one or more processors are further configured to determine each of the plurality of weights based on a number of pixels adjacent to the current block.

21. The apparatus of claim 15 , wherein the inter prediction mode corresponds to a merge mode.

22. A non-transitory computer-readable storage medium storing instructions that, when executed, causes one or more processors configured to decode video data to:

receive a current block of video data encoded with an inter prediction mode;

analyze a plurality of neighboring blocks relative to the current block to determine whether any neighboring blocks among the plurality of neighboring blocks include motion information, wherein a number of the neighboring blocks analyzed among the plurality of neighboring blocks is greater than 5;

determine a plurality of weights, wherein each weight among the plurality of weights respectively corresponds to motion information included within a set of neighboring blocks, among the plurality of neighboring blocks, that include motion information;

construct a motion vector candidate list for the current block of video data based on the motion information from the set of neighboring blocks relative to the current block;

adaptively order motion vector candidates within the constructed motion vector candidate list for the current block of video data based on the plurality of weights;

determine a current motion vector from the motion vector candidates within the motion vector candidate list; and

decode the current block of video data using the current motion vector.