US 11,871,013 B2
Signaling of reference picture resampling with constant window 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 Aug. 27, 2021, as Appl. No. 17/458,900.
Application 17/458,900 is a continuation of application No. 17/009,979, filed on Sep. 2, 2020, granted, now 11,140,402.
Claims priority of provisional application 62/903,601, filed on Sep. 20, 2019.
Prior Publication US 2021/0392348 A1, Dec. 16, 2021
Int. Cl. H04N 19/196 (2014.01); H04N 19/132 (2014.01); H04N 19/147 (2014.01); H04N 19/172 (2014.01); H04N 19/105 (2014.01)
CPC H04N 19/196 (2014.11) [H04N 19/105 (2014.11); H04N 19/132 (2014.11); H04N 19/147 (2014.11); H04N 19/172 (2014.11)] 20 Claims
OG exemplary drawing
 
1. A method of encoding a video bitstream using at least one processor, the method comprising:
setting a first flag indicating whether a constant picture size is used in a coded video sequence including a current picture;
based on the first flag indicating that the constant picture size is used, encoding the current picture without performing reference picture resampling;
based on the first flag indicating that the constant picture size is not used, setting a second flag indicating whether a conformance window size is signaled; and
based on the second flag indicating that the conformance window size is signaled:
setting the conformance window size, and
signaling a resampling ratio between the current picture and a reference picture based on the conformance window size.