Patent ID: 11889104
Assignee: PANASONIC INTELLECTUAL PROPERTY CORPORATION OF AMERICA
Field: Audio-visual technology (Electrical engineering)
Classification: CPC H | IPC H

Claim 0:
1. An encoder, comprising:
circuitry; and
memory, wherein
using the memory, the circuitry, in operation, selects an encoding mode from among candidates including a decoder-side motion vector refinement (DMVR) encoding mode and a partition encoding mode,
when the DMVR encoding mode is selected, the circuitry:
obtains a first image block from a first coding tree unit (CTU);
obtains a first motion vector for the first image block;
derives a second motion vector from the first motion vector using motion search; and
generates a prediction image for the first image block using the second motion vector; and

when the partition encoding mode is selected, the circuitry:
obtains a second image block from a second coding tree unit (CTU);
determines a plurality of partitions in the second image block;
obtains a third motion vector for each partition; and
generates a prediction image for the second image block using the third motion vector, without deriving a fourth motion vector from the third motion vector using motion search.