US 12,470,730 B2
Adaptive picture resolution rescaling for inter-prediction and display
Stephan Wenger, Palo Alto, CA (US); Jing Ye, San Jose, CA (US); Byeongdoo Choi, Palo Alto, 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 Jan. 5, 2022, as Appl. No. 17/568,954.
Application 17/568,954 is a continuation of application No. 16/710,389, filed on Dec. 11, 2019, granted, now 11,290,734.
Claims priority of provisional application 62/704,040, filed on Jan. 2, 2019.
Prior Publication US 2022/0132153 A1, Apr. 28, 2022
This patent is subject to a terminal disclaimer.
Int. Cl. H04N 19/44 (2014.01); H04N 19/105 (2014.01); H04N 19/132 (2014.01); H04N 19/172 (2014.01); H04N 19/33 (2014.01); H04N 19/423 (2014.01); H04N 19/70 (2014.01); H04N 19/80 (2014.01)
CPC H04N 19/44 (2014.11) [H04N 19/105 (2014.11); H04N 19/132 (2014.11); H04N 19/172 (2014.11); H04N 19/33 (2014.11); H04N 19/423 (2014.11); H04N 19/70 (2014.11); H04N 19/80 (2014.11)] 15 Claims
OG exemplary drawing
 
1. A method of encoding a picture of a source video sequence, the method being performed by at least one processor and comprising:
encoding, in a first high level syntax structure for a plurality of pictures, a syntax element related to a reference picture resolution and a reference tile resolution;
encoding, in a second high level syntax structure that changes from a first coded picture to a second coded picture, a plurality of syntax elements related to a plurality of tile resolutions, the first coded picture comprising a plurality of tiles at different resolutions that correspond to the plurality of tile resolutions;
obtaining a sample from a reference picture buffer for use for prediction, the sample from the reference picture buffer being in the reference picture resolution;
reconstructing the plurality of tiles in the different resolutions into a plurality of reconstructed tiles in the plurality of tile resolutions;
resampling the plurality of reconstructed tiles so a resolution of each resampled segment matches the reference tile resolution and a resolution of a source tile from which a corresponding segment was encoded, wherein a resolution of a combination of the resampled tiles matches the reference picture resolution; and
storing the plurality of reconstructed tiles into the reference picture buffer.