Method and apparatus of syntax signaling and reference constraint in video coding system

摘要

Encoding methods and apparatuses include determining parameters of a specific process for a current slice, signaling in one or more adaptation parameter sets (APS), performing a specific process using the parameters, each in a slice header signaling the APS ID of the signaled APS, and encoding the current slice. Each APS is classified into categories according to the type of data carried by the APS. The APS ID of each signaled APS is counted in a category associated with a specific process and is independent of other categories. Decoding methods and apparatuses include parsing an APS ID of each referenced APS from a slice header of a current slice for a specific process, and parsing parameters from each referenced APS according to a parsed APS ID and a category associated with the specific process. determining, performing a particular process on the current slice, and decoding the current slice.