US 12,170,786 B2
Device and method for encoding and decoding image using AI
Quockhanh Dinh, Suwon-si (KR); and Kwangpyo Choi, Suwon-si (KR)
Assigned to SAMSUNG ELECTRONICS CO., LTD., Suwon-si (KR)
Filed by SAMSUNG ELECTRONICS CO., LTD., Suwon-si (KR)
Filed on Apr. 11, 2023, as Appl. No. 18/133,369.
Application 18/133,369 is a continuation of application No. PCT/KR2022/013650, filed on Sep. 13, 2022.
Claims priority of application No. 10-2021-0125277 (KR), filed on Sep. 17, 2021; and application No. 10-2022-0106058 (KR), filed on Aug. 24, 2022.
Prior Publication US 2023/0247212 A1, Aug. 3, 2023
Int. Cl. G06T 9/00 (2006.01); H04N 19/137 (2014.01); H04N 19/42 (2014.01); H04N 19/52 (2014.01)
CPC H04N 19/42 (2014.11) [G06T 9/00 (2013.01); H04N 19/137 (2014.11); H04N 19/52 (2014.11)] 13 Claims
OG exemplary drawing
 
1. An image decoding method based on artificial intelligence (AI), the image decoding method comprising:
obtaining first feature data and second feature data from a bitstream,
obtaining a current optical flow and first weight data by applying the first feature data to an optical flow decoder;
obtaining a current residual image by applying the second feature data to a residual decoder;
obtaining a first prediction image from a previous reconstructed image, based on the current optical flow;
obtaining a second prediction image by applying a first sample value of the first weight data to a second sample value of the first prediction image; and
obtaining a current reconstructed image corresponding to a current image by combining the second prediction image with the current residual image.