US 12,219,153 B2
Image decoding device and image decoding method deriving filtering strength parameter
Shunichi Sekiguchi, Tokyo (JP); Kazuo Sugimoto, Tokyo (JP); Hiroharu Sakate, Tokyo (JP); Tokumichi Murakami, Tokyo (JP); and Akira Minezawa, Tokyo (JP)
Assigned to MITSUBISHI ELECTRIC CORPORATION, Tokyo (JP)
Filed by Mitsubishi Electric Corporation, Tokyo (JP)
Filed on Oct. 20, 2023, as Appl. No. 18/490,964.
Application 18/490,964 is a division of application No. 18/093,082, filed on Jan. 4, 2023, granted, now 11,831,881.
Application 18/093,082 is a division of application No. 17/083,441, filed on Oct. 29, 2020, granted, now 11,575,906, issued on Feb. 7, 2023.
Application 17/083,441 is a division of application No. 16/399,178, filed on Apr. 30, 2019, granted, now 10,863,180, issued on Dec. 8, 2020.
Application 16/399,178 is a division of application No. 15/868,253, filed on Jan. 11, 2018, granted, now 10,334,251, issued on Jun. 25, 2019.
Application 15/868,253 is a division of application No. 15/479,584, filed on Apr. 5, 2017, granted, now 9,906,795, issued on Feb. 27, 2018.
Application 15/479,584 is a division of application No. 14/707,940, filed on May 8, 2015, granted, now 9,654,773, issued on May 16, 2017.
Application 14/707,940 is a division of application No. 14/110,366, granted, now 9,210,426, issued on Dec. 8, 2015, previously published as PCT/JP2012/003680, filed on Jun. 5, 2012.
Claims priority of application No. 2011-145612 (JP), filed on Jun. 30, 2011.
Prior Publication US 2024/0048722 A1, Feb. 8, 2024
This patent is subject to a terminal disclaimer.
Int. Cl. H04N 19/82 (2014.01); H04N 19/117 (2014.01); H04N 19/14 (2014.01); H04N 19/154 (2014.01); H04N 19/159 (2014.01); H04N 19/176 (2014.01); H04N 19/186 (2014.01); H04N 19/593 (2014.01); H04N 19/61 (2014.01); H04N 19/86 (2014.01); H04N 19/46 (2014.01)
CPC H04N 19/154 (2014.11) [H04N 19/117 (2014.11); H04N 19/14 (2014.11); H04N 19/159 (2014.11); H04N 19/176 (2014.11); H04N 19/186 (2014.11); H04N 19/593 (2014.11); H04N 19/61 (2014.11); H04N 19/82 (2014.11); H04N 19/865 (2014.11); H04N 19/46 (2014.11)] 2 Claims
OG exemplary drawing
 
1. An image decoding device that carries out a decoding process on a coded data obtained by performing a block based coding process on an image, the image decoding device comprising:
a coded data decoder to decode the coded data to acquire compressed data of a difference image associated with each of coding blocks and an offset;
a distortion remover to carry out a filtering process on a decoded image obtained by adding a prediction image to the difference image, and to remove a block distortion at a boundary between adjacent transform blocks of the decoded image, the transform block being for transforming the difference image and corresponding to the coding block hierarchically divided from a maximum size of a coding block; and
a memory to store decoded pixel values for outputting the decoded image on which the filtering process has been carried out,
wherein the distortion remover determines whether a vertical edge or a horizontal edge of the coding block expressed by K*K pixel grid overlaps the boundary, and derives, in a case that the vertical edge or the horizontal edge overlaps the boundary, a value of a parameter of the coding block specifying filtering strength as a default value for the offset according to a set of conditions including a reference picture or a motion parameter in a partition including a pixel to which the filtering process is to be applied, wherein the offset is added to the value of the parameter in a process of selecting from different filtering processes.