US 12,069,264 B2
Method, apparatus and system for encoding and decoding a transformed block of video samples
Christopher James Rosewarne, Concord West (AU)
Assigned to Canon Kabushiki Kaisha, Tokyo (JP)
Filed by CANON KABUSHIKI KAISHA, Tokyo (JP)
Filed on Jul. 29, 2022, as Appl. No. 17/816,283.
Application 17/816,283 is a continuation of application No. 17/056,731, granted, now 11,445,191, previously published as PCT/AU2019/050534, filed on May 29, 2019.
Claims priority of application No. 2018204786 (AU), filed on Jun. 29, 2018.
Prior Publication US 2022/0368906 A1, Nov. 17, 2022
This patent is subject to a terminal disclaimer.
Int. Cl. H04N 19/12 (2014.01); H04N 19/176 (2014.01); H04N 19/60 (2014.01)
CPC H04N 19/12 (2014.11) [H04N 19/176 (2014.11); H04N 19/60 (2014.11)] 10 Claims
OG exemplary drawing
 
1. A method of decoding a transform block in an image from a bitstream, the method comprising:
decoding at least a single truncated unary codeword from the bitstream; and
determining, for the transform block, a horizontal transform type by using the decoded single truncated unary codeword and a vertical transform type by using the decoded single truncated unary codeword,
wherein, by using the decoded single truncated unary codeword, different transform types are determinable for the horizontal transform type and the vertical transform type; and
decoding the transform block in the image by applying the determined horizontal transform type and the determined vertical transform type to the transform block in the image,
wherein, the decoded single truncated unary codeword specifies one of options for the horizontal transform type and the vertical transform type, the horizontal transform type and the vertical transform type are a first transform type in one option among the options, and the horizontal transform type and the vertical transform type are a second transform type in another option among the options.