Encoding Method and Device and Decoding Method and Device

An encoding method, comprising:

• determining an applicable spatial layout format of a two-dimensional panorama picture and a spatial position relationship among sub-pictures in the two-dimensional panorama picture in the applicable spatial layout format;
• determining whether the spatial position relationship among the sub-pictures in the two-dimensional panorama picture in the applicable spatial layout format is the same as a default spatial position relationship in the applicable spatial layout format;
• and
• encoding indication information indicating that the sub-pictures in the two-dimensional panorama picture in the applicable spatial layout format use the default spatial position relationship, and encoding the sub-pictures in the two-dimensional panorama picture based on the applicable spatial layout format and the default spatial position relationship to generate an encoded bitstream when the spatial position relationship among the sub-pictures in the two-dimensional panorama picture in the applicable spatial layout format is the same as the default spatial position relationship in the applicable spatial layout format.

A decoding apparatus, comprising:

• a memory comprising instructions;
• and
• a processor coupled to the memory, the instructions causing the processor to be configured to:
• receive an encoded bitstream of a two-dimensional panorama picture;
• determine an applicable spatial layout format of the two-dimensional panorama picture;
• parse the encoded bitstream to determine whether a spatial position relationship among sub-pictures in the two-dimensional panorama picture in the applicable spatial layout format is a default spatial position relationship;
• and
• decode the encoded bitstream of the two-dimensional panorama picture based on the applicable spatial layout format and the default spatial position relationship when the spatial position relationship among the sub-pictures in the two-dimensional panorama picture in the applicable spatial layout format is the default spatial position relationship.

An encoding apparatus, comprising:

• a memory comprising instructions;
• and
• a processor coupled to the memory, the instructions causing the processor to be configured to:
• determine an applicable spatial layout format of a two-dimensional panorama picture and a spatial position relationship among sub-pictures in the two-dimensional panorama picture in the applicable spatial layout format;
• determine whether the spatial position relationship among the sub-pictures in the two-dimensional panorama picture in the applicable spatial layout format is the same as a default spatial position relationship in the applicable spatial layout format;
• and
• encode indication information indicating that the sub-pictures in the two-dimensional panorama picture in the applicable spatial layout format use the default spatial position relationship, and encode the sub-pictures in the two-dimensional panorama picture based on the applicable spatial layout format and the default spatial position relationship to generate an encoded bitstream when the spatial position relationship among the sub-pictures in the two-dimensional panorama picture in the applicable spatial layout format is the same as the default spatial position relationship in the applicable spatial layout format.