Signaling for reference picture resampling

A method of video encoding, the method comprising:

• receiving a video data comprising a current picture;
• determining a first variable indicating whether reference picture resampling is enabled;
• determining, based on the first variable indicating that the reference picture resampling is enabled, a second variable indicating a reference picture resampling mode;
• determining whether a resolution of the current picture is different from a resolution of a reference picture;
• and
• based on determining that the resolution of the current picture is different from the resolution of the reference picture, encoding the current picture in a bitstream according to the reference picture resampling mode.

A non-transitory computer-readable storage medium storing instructions and a video bitstream that are generated by a video encoding method, the instructions, when executed by a computer, cause the computer to implement a video encoding method comprising:

• determining a first variable indicating whether reference picture resampling is enabled;
• determining, based on the first variable indicating that the reference picture resampling is enabled, a second variable indicating a reference picture resampling mode;
• determining whether a resolution of a current picture is different from a resolution of a reference picture;
• based on determining that the resolution of the current picture is different from the resolution of the reference picture, encoding the current picture in the video bitstream according to the reference picture resampling mode;
• and
• transmitting the video bitstream.