Method and Apparatus for Intra Block Copy Reference List Construction

A method of coding video data, comprising:

• receiving input data associated with a current slice in a current picture;
• determining a temporary reference picture list for the current slice in an initialization stage of reference picture list construction;
• setting the current picture to an Nth position of the temporary reference picture list if an Intra Picture Block Copy (IntraBC) mode is allowed for the current slice , wherein N is a maximum number of reference pictures allowed in a final reference picture list;
• deriving the final reference picture list from the temporary reference picture list by copying N entries of the temporary reference picture list to the final reference picture list;
• and
• encoding or decoding the current slice according to the final reference picture list.

An apparatus of coding video data, the apparatus comprising one or more electronic circuits configured to:

• receive input data associated with a current slice in a current picture;
• determine a temporary reference picture list for the current slice in an initialization stage of reference picture list construction and include the current picture in the temporary reference picture list if an Intra Picture Block Copy (IntraBC) mode is allowed for the current slice;
• derive a final reference picture list from the temporary reference picture list by copying N entries of the temporary reference picture list to the final reference picture list, wherein N is a maximum number of reference pictures allowed in the final reference picture list;
• adjust the final reference picture list by setting the current picture to a predefined position of the final reference picture list if the IntraBC mode is allowed for the current slice;
• and
• encode or decode the current slice according to the final reference picture list.

An apparatus of decoding video bitstream with prediction offset, the apparatus comprising one or more electronic circuits configured to:

• receive input data associated with a current slice in a current picture;
• determine a temporary reference picture list for the current slice in an initialization stage of reference picture list construction;
• set the current picture to an Nth position of the temporary reference picture list if an Intra Picture Block Copy (IntraBC) mode is allowed for the current slice, wherein N is a maximum number of reference pictures allowed in a final reference picture list;
• derive a final reference picture list from the temporary reference picture list by copying N entries of the temporary reference picture list to the final reference picture list;
• and
• encode or decode the current slice according to the final reference picture list.