US 12,445,608 B2
Method of transmitting a bitstream including an encoded signal and syntax information to which a decoder performs a decoding method of decoding a current block based on a prediction image generated using an interpolation filter
Chong Soon Lim, Singapore (SG); Hai Wei Sun, Singapore (SG); Han Boon Teo, Singapore (SG); Jing Ya Li, Singapore (SG); Che Wei Kuo, Singapore (SG); Kiyofumi Abe, Osaka (JP); Tadamasa Toma, Osaka (JP); Takahiro Nishi, Nara (JP); and Yusuke Kato, Osaka (JP)
Assigned to PANASONIC INTELLECTUAL PROPERTY CORPORATION OF AMERICA, Torrance, CA (US)
Filed by Panasonic Intellectual Property Corporation of America, Torrance, CA (US)
Filed on Jul. 3, 2024, as Appl. No. 18/763,019.
Application 18/763,019 is a continuation of application No. 18/142,166, filed on May 2, 2023, granted, now 12,081,749.
Application 18/142,166 is a continuation of application No. 17/837,171, filed on Jun. 10, 2022, granted, now 11,722,662, issued on Aug. 8, 2023.
Application 17/837,171 is a continuation of application No. 17/321,834, filed on May 17, 2021, granted, now 11,394,968, issued on Jul. 19, 2022.
Application 17/321,834 is a continuation of application No. PCT/JP2019/050438, filed on Dec. 23, 2019.
Claims priority of provisional application 62/786,935, filed on Dec. 31, 2018.
Prior Publication US 2024/0357103 A1, Oct. 24, 2024
This patent is subject to a terminal disclaimer.
Int. Cl. H04N 19/117 (2014.01); H04N 19/176 (2014.01); H04N 19/51 (2014.01); H04N 19/80 (2014.01)
CPC H04N 19/117 (2014.11) [H04N 19/176 (2014.11); H04N 19/51 (2014.11); H04N 19/80 (2014.11)] 1 Claim
OG exemplary drawing
 
1. A method of transmitting a bitstream, the bitstream including an encoded signal and syntax information according to which a decoder performs a decoding method of decoding a current block to be decoded in an image, the method comprising:
transmitting the bitstream to the decoder,
wherein the decoding method comprising:
generating a first prediction image based on a motion vector, the first prediction image being an image with full-pel precision;
generating a second prediction image using a first interpolation filter by interpolating a value at a fractional-pel position between full-pel positions included in the first prediction image; and
decoding the current block based on the second prediction image,
wherein, the decoding method further comprising:
judging whether the current block is a sub-block of affine mode; and
selecting a second interpolation filter as the interpolation filter for generating the second prediction image, in response to the current block being a sub-block of affine mode, and
wherein the second interpolation filter has fewer taps than the first interpolation filter.