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Moving picture coding device, moving picture coding method, moving picture coding program, moving picture decoding device, moving picture decoding method, and moving picture decoding program

專利號
US11800087B2
公開日期
2023-10-24
申請人
JVCKENWOOD Corporation（JP Yokohama）
發(fā)明人
Shigeru Fukushima; Toru Kumakura; Hideki Takehara; Hiroya Nakamura; Satoru Sakazume; Hiroyuki Kurashige
IPC分類
H04N19/105; H04N19/51; H04N19/139; H04N19/159; H04N19/172
技術(shù)領(lǐng)域
prediction,predictor,motion,candidate,vector,merging,picture,coding,inter,derivation
地域： Yokohama

摘要

There is provided a technique that includes a triangle merging candidate list constructor structured to construct a triangle merging candidate list including spatial merging candidates, a first triangle merging candidate selector structured to select, from the triangle merging candidate list, a first triangle merging candidate that is uni-prediction, and a second triangle merging candidate selector structured to select, from the triangle merging candidate list, a second triangle merging candidate that is uni-prediction, in which in a region where motion compensation by weighted averaging by the first triangle merging candidate and the second triangle merging candidate is performed, uni-prediction motion information of one of the first triangle merging candidate or the second triangle merging candidate is saved.

說明書

sps_affine_type_flag indicates whether motion compensation using a 6-parameter affine model is usable in inter prediction. When sps_affine_type_flag is 0, the process is suppressed so as not to perform motion compensation using a 6-parameter affine model. Moreover, cu_affine_type_flag is not transmitted in the CU syntax of the coding video sequence. When sps_affine_type_flag is 1, motion compensation based on a 6-parameter affine model is usable in a coding video sequence. In a case where sps_affine_type_flag does not exist, it shall be 0.

In a case of decoding a P or B slice, when inter_affine_flag is 1 in the current target CU, a motion compensation using an affine model is used in order to generate a motion compensation prediction signal of the current target CU. When inter_affine_flag is 0, the affine model is not used for the current target CU. In a case where inter_affine_flag does not exist, it shall be 0.

In a case of decoding a P or B slice, when cu_affine_type_flag is 1 in the current CU, a motion compensation using a 6-parameter affine model is used in order to generate a motion compensation prediction signal of the current CU. When cu_affine_type_flag is 0, motion compensation using a four-parameter affine model is used to generate a motion compensation prediction signal of the CU currently being processed.

A reference index and a motion vector are derived in units of subblocks in the motion compensation based on the affine model. Accordingly, a motion compensation prediction signal is generated using the reference index and the motion vector to be processed in subblock units.

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