US 12,149,735 B2
Image decoding device, image encoding device, and image decoding method
Tomoyuki Yamamoto, Sakai (JP); Tomohiro Ikai, Sakai (JP); Yukinobu Yasugi, Sakai (JP); and Takeshi Tsukuba, Sakai (JP)
Assigned to SHARP KABUSHIKI KAISHA, Sakai (CN)
Filed by Sharp Kabushiki Kaisha, Osaka (JP)
Filed on Feb. 23, 2023, as Appl. No. 18/113,236.
Application 18/113,236 is a continuation of application No. 17/019,453, filed on Sep. 14, 2020, granted, now 11,627,337.
Application 17/019,453 is a continuation of application No. 14/371,766, abandoned, previously published as PCT/JP2013/050356, filed on Jan. 11, 2013.
Claims priority of application No. 2012-005630 (JP), filed on Jan. 13, 2012.
Prior Publication US 2023/0199218 A1, Jun. 22, 2023
Int. Cl. H04N 19/587 (2014.01); H04N 19/11 (2014.01); H04N 19/14 (2014.01); H04N 19/176 (2014.01); H04N 19/186 (2014.01); H04N 19/70 (2014.01); H04N 19/117 (2014.01); H04N 19/82 (2014.01)
CPC H04N 19/587 (2014.11) [H04N 19/11 (2014.11); H04N 19/14 (2014.11); H04N 19/176 (2014.11); H04N 19/186 (2014.11); H04N 19/70 (2014.11); H04N 19/117 (2014.11); H04N 19/82 (2014.11)] 3 Claims
OG exemplary drawing
 
3. An image decoding method for decoding an encoded image, wherein the image decoding method including:
setting a value of a filter application flag by using a prediction mode and a size of a target unit; and
deriving an absolute value of a displacement by using (i) the prediction mode and (ii) a prediction mode number representing a vertical direction or a prediction mode number representing a horizontal direction, and determining the value of the filter application flag according to whether the absolute value of the displacement is less than or equal to a threshold,
wherein the threshold is configured with a smaller value for a larger size of the target unit,
wherein a specific prediction mode number is assigned in advance for each direction of prediction, and
wherein the displacement indicates (i) a difference between (a) a prediction mode number representing a direction of prediction and (b) the prediction mode number representing the vertical direction, or (ii) a difference between (a) the prediction mode number representing the direction of prediction and (b) the prediction mode number representing the horizontal direction.