METHODS FOR SIGNALING VIDEO CODING DATA

1 . A method for video encoding, comprising:

signaling a wrap-around motion compensation flag indicating whether a wrap-around motion compensation is enabled;

in response to the wrap-around motion compensation flag indicating that the wrap-around motion compensation is enabled, signaling data indicating a difference between a width of a picture and an offset used for determining a horizontal wrap-around position,

wherein the wrap-around motion compensation flag and the difference are used in a motion compensation operation.

2 . The method of claim 1 , wherein the difference is in units of a size of a minimum luma coding block.

3 . The method of claim 1 , wherein the difference is less than or equal to (pps_pic_width_in_luma_samples/MinCbSizeY)−(CtbSizeY/MinCbSizeY)−2, wherein pps_pic_width_in_luma_samples is the width of the picture in units of luma samples, MinCbSizeY is the size of the minimum luma coding block, and CtbSizeY is a size of a luma coding tree block.

4 . The method of claim 1 , wherein, in the motion compensation operation,

a wrap-around motion compensation offset according to the width of the picture and the difference is determined; and

the wrap-around motion compensation offset is used to perform the motion compensation.

5 . The method of claim 4 , wherein, in determining the wrap-around motion compensation offset according to the width of the picture and the difference,

the width of the picture in units of luma samples is divided by a size of a minimum luma coding block, to generate a first value; and

the wrap-around motion compensation offset is determined as being equal to the first value minus the difference.

6 . The method of claim 1 , wherein signaling the data indicating the difference further comprises:

signaling a wrap-around offset type flag;

determining whether the wrap-around offset type flag is equal to a first value or a second value;

in response to a determination that the wrap-around offset type flag is equal to the first value, signaling the data indicating the difference between the width of the picture and the offset used for computing a horizontal wrap-around position; and

in response to a determination that the wrap-around offset type flag is equal to the second value, signaling the data indicating the offset used for computing a horizontal wrap-around position.

7 . The method of claim 6 , wherein each of the first value and the second value is 0 or 1.

8 . The method of claim 1 , wherein the method further comprises:

receiving the picture for coding, wherein the picture comprises one or more slices.

9 . The method of claim 1 , wherein the picture is in a bitstream.

10 . The method of claim 1 , wherein the wrap-around motion compensation flag and the difference are signaled in a Picture Parameter Set (PPS).

11 . A system for performing video encoding, the system comprising:

a memory storing a set of instructions; and

one or more processors configured to execute the set of instructions to cause the system to perform:

signaling a wrap-around motion compensation flag indicating whether a wrap-around motion compensation is enabled;

in response to the wrap-around motion compensation flag indicating that the wrap-around motion compensation is enabled, signaling data indicating a difference between a width of a picture and an offset used for determining a horizontal wrap-around position,

wherein the wrap-around motion compensation flag and the difference are used in a motion compensation operation.

12 . The system of claim 1 , wherein the difference is in units of a size of a minimum luma coding block.

13 . The system of claim 11 , wherein the difference is less than or equal to (pps_pic_width_in_luma_samples/MinCbSizeY)−(CtbSizeY/MinCbSizeY)−2, wherein pps_pic_width_in_luma_samples is the width of the picture in units of luma samples, MinCbSizeY is the size of the minimum luma coding block, and CtbSizeY is a size of a luma coding tree block.

14 . The system of claim 11 , wherein, in the motion compensation operation,

a wrap-around motion compensation offset according to the width of the picture and the difference is determined; and

the wrap-around motion compensation offset is used to perform the motion compensation.

15 . The system of claim 14 , wherein, in determining the wrap-around motion compensation offset according to the width of the picture and the difference,

the width of the picture in units of luma samples is divided by a size of a minimum luma coding block, to generate a first value; and

the wrap-around motion compensation offset is determined as being equal to the first value minus the difference.

16 . The system of claim 11 , wherein, in signaling the data indicating the difference, the one or more processors are configured to execute the set of instructions to cause the system to further perform:

signaling a wrap-around offset type flag;

determining whether the wrap-around offset type flag is equal to a first value or a second value;

in response to a determination that the wrap-around offset type flag is equal to the first value, signaling the data indicating the difference between the width of the picture and the offset used for computing a horizontal wrap-around position; and

in response to a determination that the wrap-around offset type flag is equal to the second value, signaling the data indicating the offset used for computing a horizontal wrap-around position.

17 . The system of claim 16 , wherein each of the first value and the second value is 0 or 1.

18 . The system of claim 11 , wherein the picture is coded according to versatile video coding standard.

19 . The system of claim 11 , wherein the wrap-around motion compensation flag and the difference are signaled in a Picture Parameter Set (PPS).

20 . A non-transitory computer readable medium that stores a set of instructions that are executable by one or more processors of system to cause the system to perform operations for video encoding, the operations comprising:

signaling a wrap-around motion compensation flag indicating whether a wrap-around motion compensation is enabled;

in response to the wrap-around motion compensation flag indicating that the wrap-around motion compensation is enabled, signaling data indicating a difference between a width of a picture and an offset used for determining a horizontal wrap-around position,

wherein the wrap-around motion compensation flag and the difference are used in a motion compensation operation.