US 12,137,245 B2
Image encoding method and image decoding method
Takuya Shimizu, Kyoto (JP)
Assigned to MAXELL, LTD., Kyoto (JP)
Appl. No. 17/788,342
Filed by Maxell, Ltd., Kyoto (JP)
PCT Filed Dec. 24, 2020, PCT No. PCT/JP2020/048512
§ 371(c)(1), (2) Date Jun. 23, 2022,
PCT Pub. No. WO2021/132490, PCT Pub. Date Jul. 1, 2021.
Claims priority of application No. 2019-233608 (JP), filed on Dec. 25, 2019.
Prior Publication US 2023/0038870 A1, Feb. 9, 2023
Int. Cl. H04N 19/105 (2014.01); H04N 19/176 (2014.01); H04N 19/593 (2014.01)
CPC H04N 19/593 (2014.11) [H04N 19/105 (2014.11); H04N 19/176 (2014.11)] 4 Claims
OG exemplary drawing
 
3. An image encoding method for encoding an image, comprising:
generating a predicted image by a plurality of types of predicted image generating processing, the plurality of types of predicted image generating processing include an intra prediction, an inter prediction, and a synthesis prediction, wherein the synthesis prediction performs synthesis processing of synthesizing a predicted image of an inter prediction and a predicted image of an intra prediction to an encoding-target block; and
encoding a difference between the predicted image generated and a pixel value of an image of the encoding-target block, wherein
types of the predictions that can be used in generating the predicted image include an angular prediction, a planar prediction, and an in-screen block copy prediction, and
the synthesizing processing includes weighting processing performed on the predicted image of the inter prediction and the predicted image of the intra prediction, and
the weighting processing includes setting a weighting for the predicted image of the intra prediction to be the smallest weighting under the condition that the type of the intra prediction being the planar prediction.