Wrap-around padding for omnidirectional media coding

A method of encoding a current picture for video encoding using at least one processor, the method comprising:

• making a first determination whether padding is applied to a plurality of sub-regions of the current picture;
• based on the first determination indicating that the padding is not applied, encoding the plurality of sub-regions without padding;
• determining whether to apply padding based on whether wrap-around padding is enabled;
• based on a second determination indicating that the padding comprises the wrap-around padding, obtaining an offset value from the picture partitioning information and encoding the plurality of sub-regions based on the wrap-around padding and the offset value, the offset value specifies an offset in luma samples used to compute a wrap-around position used to select a reference block corresponding to a current block of the current picture;
• generating picture partitioning information based on the first determination and the second determination, wherein the picture partitioning information indicates whether padding is applied to the plurality of sub-regions and whether the padding comprises wrap-around padding;
• encoding the current picture based on the encoded plurality of sub-regions and the picture partitioning information.

A non-transitory computer readable medium storing instructions, which when executed by a processor, cause the processor to execute a method for generating a bitstream including an encoded picture and picture partitioning information, the method comprising:

• making a first determination whether padding is applied to a plurality of sub-regions of the current picture;
• based on the first determination indicating that the padding is not applied, encoding the plurality of sub-regions without padding;
• determining whether to apply padding based on whether wrap-around padding is enabled;
• based on a second determination indicating that the padding comprises the wrap-around padding, obtaining an offset value from the picture partitioning information and encoding the plurality of sub-regions based on the wrap-around padding and the offset value, the offset value specifies an offset in luma samples used to compute a wrap-around position used to select a reference block corresponding to a current block of the current picture;
• generating the picture partitioning information based on the first determination and the second determination, wherein the picture partitioning information indicates whether padding is applied to the plurality of sub-regions and whether the padding comprises wrap-around padding;
• encoding the current picture based on the encoded plurality of sub-regions and the picture partitioning information;
• and
• generating the bitstream comprising the picture partitioning information and the encoded current picture.