Patent ID: 11924423
Assignee: PANASONIC INTELLECTUAL PROPERTY CORPORATION OF AMERICA
Field: Audio-visual technology (Electrical engineering)
Classification: CPC H | IPC H

Claim 2:
3. A non-transitory computer readable medium storing a bitstream, the bitstream including information on inter prediction according to which a decoder determines to perform first inter prediction or second inter prediction, the first inter prediction including a bi-directional optical flow (BIO) process, the second inter prediction including a motion compensation process, the second inter prediction not including the BIO process, wherein
an image block is obtained from a coding tree unit (CTU), and
in response to a determination, based on the information on inter prediction, to perform the BIO process,
(i) first prediction images for the image block are obtained;
(ii) gradient images for the first prediction images are obtained by determining difference values between adjacent pixels; and
(iii) a prediction image for the image block is generated using the first prediction images and the gradient images, and

in response to a determination, based on the information on inter prediction, to perform the motion compensation process,
(i) a plurality of partitions are determined in the image block;
(ii) a second prediction image is obtained for each of the plurality of partitions; and
(iii) a prediction image for the image block is generated using the second prediction images, wherein,

the information includes a flag.