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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

Similarly, as illustrated in the inter prediction unit 203 on the decoding side in FIG. 22, in a case where the switch 408 is connected to the subblock merge mode derivation unit 404 during the decoding process, the motion compensation prediction unit 406 acquires inter prediction information by the subblock merge mode derivation unit 404, and derives an inter prediction mode, a reference index, and a motion vector of current target block, thereby generating a motion compensation prediction signal. The constructed motion compensation prediction signal is supplied to the decoded picture signal superimposer 207.

Motion Compensation Process Based on Affine Transform Prediction

In the normal motion vector predictor mode and the normal merge mode, motion compensation using an affine model is usable based on the following flags. The following flags are reflected in the following flags on the basis of inter prediction conditions determined by the inter prediction mode determiner 305 in the coding process, and are coded in the bitstream. In the decoding process, whether to perform motion compensation using the affine model on the basis of the following flags in the bitstream is specified.

sps_affine_enabled_flag indicates whether motion compensation using an affine model is usable in inter prediction. When sps_affine_enabled_flag is 0, the process is suppressed so as not to perform motion compensation by the affine model in units of sequence. Moreover, inter_affine_flag and cu_affine_type_flag are not transmitted in the coding block (CU) syntax of a coding video sequence. When sps_affine_enabled_flag is 1, motion compensation by an affine model is usable in the coding video sequence.

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