US 12,470,751 B2
Signaling of downsampling filters for chroma from luma intra prediction mode
Jing Ye, San Jose, CA (US); Xin Zhao, San Jose, CA (US); Liang Zhao, Sunnyvale, 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 Nov. 8, 2022, as Appl. No. 17/982,979.
Claims priority of provisional application 63/356,820, filed on Jun. 29, 2022.
Prior Publication US 2024/0007676 A1, Jan. 4, 2024
Int. Cl. H04N 19/70 (2014.01); H04N 19/117 (2014.01); H04N 19/132 (2014.01); H04N 19/176 (2014.01); H04N 19/186 (2014.01); H04N 19/593 (2014.01)
CPC H04N 19/70 (2014.11) [H04N 19/117 (2014.11); H04N 19/132 (2014.11); H04N 19/176 (2014.11); H04N 19/186 (2014.11); H04N 19/593 (2014.11)] 20 Claims
OG exemplary drawing
 
1. A method for video encoding, the method being performed by at least one processor and comprising:
determining a current chroma block to be coded;
determining that a cross-component intra prediction mode is selected for video coding;
based on determining that the cross-component mode is selected and based on multi-tap downsampling filter being supported, determining pixel values of a plurality of downsampled luma samples for a plurality of chroma samples using a first equation that is associated with the multi-tap downsampling filter being supported in combination with one or more AOMedia Video 1 (“AV1”) filters, wherein the first equation is based on the multi-tap filter being used, pixel values at specific positions, and a rounding value; and
encoding the current chroma block based on at least the plurality of downsampled luma samples.