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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

In this manner, it is possible to use prediction without limiting the relationship between the prediction type of L0/L1 and time such that L0 to the past direction and L1 to the future direction. Moreover, bi-prediction may perform each of L0-prediction and L1-prediction using a same reference picture. The determination whether to perform motion compensation prediction in the uni-prediction or the bi-prediction is made on the basis of information (for example, a flag) indicating whether to use the L0-prediction and whether to use the L1-prediction, for example.

Reference Index

In the embodiment of the present invention, it is possible to select an optimal reference picture from a plurality of reference pictures in motion compensation prediction in order to improve motion compensation prediction accuracy. Therefore, the reference picture used in the motion compensation prediction is to be used as a reference index, and the reference index is coded in a bitstream together with the motion vector difference.

Motion Compensation Process Based on Normal Motion Vector Predictor Mode

As illustrated in the inter prediction unit 102 on the coding side in FIG. 16, in a case where inter prediction information by the normal motion vector predictor mode derivation unit 301 has been selected on the inter prediction mode determiner 305, the motion compensation prediction unit 306 acquires this inter prediction information from the inter prediction mode determiner 305, and derives an inter prediction mode, a reference index, and a motion vector of a target block and thereby generates a motion compensation prediction signal. The constructed motion compensation prediction signal is supplied to the prediction method determiner 105.

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