Method for region-wise scalability with adaptive resolution change

A system for decoding a coded video stream that includes a picture partitioned into a plurality of sub-pictures, the system comprising:

• memory configured to store computer program code;
• and
• at least one processor configured to receive the coded video stream, access the computer program code, and operate as instructed by the computer program code, the computer program code comprising:
• adaptive resolution changing code configured to cause the at least one processor to adaptively change resolution of a sub-picture from among the plurality of sub-pictures based on ARC information of the coded video stream that is received,
• wherein the ARC information is signaled directly within a header of the sub-picture, or is signaled directly within a parameter set without any of the ARC information within the parameter set being referenced in any header or other parameter set, or is provided within the parameter set and referenced in the header.