Intra-frame and inter-frame combined prediction method for P frames or B frames

Abstract

The invention discloses an intra-frame and inter-frame combined prediction method for P frames or B frames. Whether the intra-frame and inter-frame combined prediction is used or not is adaptively selected through rate-distortion optimization RDO decision; a method for weighting an intra-frame prediction block and an inter-frame prediction block is used in the intra-frame and inter-frame combinedprediction to obtain a final prediction block; the weighting coefficients of the intra-frame prediction block and the inter-frame prediction block are obtained according to prediction distortion statistics of the prediction method; therefore the prediction precision can be improved, and the coding and decoding efficiency of the prediction block are improved; the advantages of intra-frame prediction and inter-frame prediction are fully used, the two methods are selected to combine the optimal prediction parts, the area within the excessive distortion of the intra-frame prediction block and theinter-frame prediction block can be removed to a certain extent to obtain a better prediction effect; and the practicality and the robustness are high.

Description

technical field [0001] The present invention relates to the technical field of video coding, in particular to a prediction method for an inter-frame prediction frame (that is, a P frame or a B frame), which can combine an intra-frame prediction block and an inter-frame prediction block to obtain a final prediction block. Enhance the accuracy of the prediction, thereby improving the coding efficiency. Background technique [0002] In video coding, intra-frame prediction and inter-frame prediction are very effective tools to remove redundant information in video sequences. Specifically, inter prediction utilizes the correlation between the current frame and its reference frame to reduce temporal redundancy, while intra prediction utilizes the similarity between spatially adjacent pixels to eliminate spatial redundancy. [0003] In current coding standards, intra prediction and inter prediction are independent of each other. Intra prediction is used for intra prediction frame...

AI Technical Summary

Problems solved by technology

[0005] The existing intra-frame prediction and inter-frame prediction methods are independent of each other, and the advantages and disadvantages of intra-frame prediction and inter-frame prediction are not comprehensively considered. Only the optimal prediction mode is selected through the decision of the encoding side, and the two prediction methods cannot be better utilized. advantage, thus limiting the performance of prediction to some extent

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