US 11,991,359 B2
Method and apparatus for selecting transform selection in an encoder and decoder
Christopher Hollmann, Uppsala (SE); Davood Saffar, Solna (SE); Jacob Ström, Stockholm (SE); and Per Wennersten, Årsta (SE)
Assigned to Telefonaktiebolaget LM Ericsson (publ), Stockholm (SE)
Filed by Telefonaktiebolaget LM Ericsson (publ), Stockholm (SE)
Filed on Dec. 8, 2022, as Appl. No. 18/077,414.
Application 18/077,414 is a continuation of application No. 17/360,088, filed on Jun. 28, 2021, granted, now 11,558,613.
Application 17/360,088 is a continuation of application No. 16/640,010, granted, now 11,082,692, issued on Aug. 3, 2021, previously published as PCT/SE2019/051206, filed on Nov. 28, 2019.
Claims priority of provisional application 62/785,856, filed on Dec. 28, 2018.
Prior Publication US 2023/0109113 A1, Apr. 6, 2023
This patent is subject to a terminal disclaimer.
Int. Cl. H04N 19/12 (2014.01); H04N 19/13 (2014.01); H04N 19/147 (2014.01); H04N 19/176 (2014.01); H04N 19/46 (2014.01)
CPC H04N 19/12 (2014.11) [H04N 19/13 (2014.11); H04N 19/147 (2014.11); H04N 19/176 (2014.11); H04N 19/46 (2014.11)] 22 Claims
OG exemplary drawing
 
1. A method performed by a decoder, the method comprising:
obtaining an encoded video block having at least one flag;
parsing a flag of the at least one flag to determine if the flag is set to signal that a transform of a plurality of transforms is to be used to decode the encoded video block in both a horizontal direction and a vertical direction to generate a decoded video block; and
responsive to when the flag is determined to be set to signal that the transform is not to be used in both the horizontal direction and in the vertical direction when decoding, parsing another flag of the at least one flag to determine in which one of the horizontal direction or the vertical direction the transform is to be used to decode the encoded video block.