US 11,889,121 B2
Filters for motion compensation interpolation with reference down-sampling
Jiancong Luo, San Mateo, CA (US); Yan Ye, San Mateo, CA (US); and Mohammed Golam Sarwer, San Mateo, CA (US)
Assigned to Alibaba Group Holding Limited, Grand Cayman (KY)
Filed by ALIBABA GROUP HOLDING LIMITED, Grand Cayman (KY)
Filed on Apr. 13, 2022, as Appl. No. 17/659,139.
Application 17/659,139 is a continuation of application No. 16/998,332, filed on Aug. 20, 2020, granted, now 11,317,122.
Claims priority of provisional application 62/906,930, filed on Sep. 27, 2019.
Claims priority of provisional application 62/904,608, filed on Sep. 23, 2019.
Prior Publication US 2022/0239952 A1, Jul. 28, 2022
Int. Cl. H04N 19/80 (2014.01); H04N 19/51 (2014.01)
CPC H04N 19/80 (2014.11) [H04N 19/51 (2014.11)] 21 Claims
OG exemplary drawing
 
1. A computer-implemented method for processing video content, comprising:
encoding or decoding a picture block by applying a first filter to a reference picture,
wherein the applying of the first filter performs both motion-compensation interpolation and downsampling of the reference picture, and
wherein the first filter is a band-pass filter having a plurality of integer coefficients derived from a cosine windowed-sinc function, a sum of the plurality of integer coefficients being equal to a power of 2.