US 12,294,710 B2
Signaling of reference picture resampling with resampling picture size indication in video bitstream
Byeongdoo Choi, Palo Alto, CA (US); Stephan Wenger, Hillsborough, CA (US); and Shan Liu, San Jose, CA (US)
Assigned to TENCENT AMERICA LLC, Palo Alto, CA (US)
Filed by TENCENT AMERICA LLC, Palo Alto, CA (US)
Filed on Sep. 15, 2023, as Appl. No. 18/369,040.
Application 18/369,040 is a continuation of application No. 17/711,524, filed on Apr. 1, 2022, granted, now 11,825,095.
Application 17/711,524 is a continuation of application No. 17/010,163, filed on Sep. 2, 2020, granted, now 11,336,894, issued on May 17, 2022.
Claims priority of provisional application 62/905,319, filed on Sep. 24, 2019.
Claims priority of provisional application 62/903,639, filed on Sep. 20, 2019.
Prior Publication US 2024/0007643 A1, Jan. 4, 2024
This patent is subject to a terminal disclaimer.
Int. Cl. H04N 19/132 (2014.01); H04N 19/167 (2014.01); H04N 19/172 (2014.01); H04N 19/463 (2014.01)
CPC H04N 19/132 (2014.11) [H04N 19/167 (2014.11); H04N 19/172 (2014.11); H04N 19/463 (2014.11)] 20 Claims
OG exemplary drawing
 
1. A method of encoding a video bitstream using at least one processor, the method comprising:
receiving a current picture;
setting a conformance window for the current picture, the conformance window corresponding to a subpart of the current picture to be output by a decoder;
setting a first flag indicating that the conformance window is present in the current picture;
setting a second flag indicating whether the conformance window is used for determining a resampling ratio between the current picture and a reference picture;
based on the second flag having a first value indicating that the conformance window is used for reference picture resampling, determining a resampling ratio between the current picture and a reference picture based on a conformance window size of the conformance window;
based on the second flag having a second value indicating that the conformance window is not used for the reference picture resampling, determining the resampling ratio based on a resampling picture size, the second value different from the first value; and
encoding the video bitstream including the current picture, the conformance window, the first flag, and the second flag.