Method for making inter-frame weighted prediction based on reference quality

Abstract

The invention belongs to the field of video coding and decoding technology, and discloses a method for making an inter-frame weighted prediction based on a reference quality. The method comprises thefollowing steps: for a coding mode that requires motion estimation, first calculating a weight of a corresponding reference list based on a reference frame quality to obtain a first weight mode; thenselecting a preferred weight mode from the first weight mode and a default weight mode in combination with a rate distortion cost, searching an optimal matching block for a current coded block, and performing a weighted prediction in the preferred weight mode; and for a coding mode that does not require motion estimation, selecting an optimal weight from the weights of coded blocks at all candidate list positions of the current coded block based on the rate distortion cost, and then performing a weighted prediction based on the optimal weight. The method not only can improve the accuracy of searching the matching block, but also can reflect a different matching degree to the current coded block when a motion compensation block performs weighting. The calculation of weights is adaptive, which reduces the complexity.

Description

technical field [0001] The invention belongs to the technical field of video encoding and decoding, and in particular relates to an inter-frame weighted prediction method based on different reference quality settings and different weights. Background technique [0002] Inter-frame weighted prediction is an important inter-frame prediction technology in video coding, which can be used to correct motion compensation prediction pixels in P slice or B slice. The basic process of inter-frame bidirectional weighted prediction is to find a best matching block on the reference frame of the reference list (List0 and List1) for the current coding block through motion estimation, where the image used for prediction is called the reference image, and the reference The displacement from the block to the current pixel block is called the motion vector (MV), the difference between the current pixel block and the reference block is called the prediction residual, and the index of the refere...

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to solve the technical problem of different matching degrees between the optimal matching blocks of the two reference lists and the current encoding in the existing reference software, and the present invention provides a two-way weighting method based on reference quality method of prediction

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