Intra-frame prediction method for inter-frame prediction frame

Abstract

The invention discloses an intra-frame prediction method. For an intra-frame prediction block in an inter-frame prediction frame, the encoding and decoding orders of the intra-frame and inter-frame blocks are adjusted when an inter-frame prediction block is existent at the right lower side of the intra-frame prediction block; and the prediction is performed by taking a reconstructed pixel value atthe right lower side as a reference pixel point as an intra-frame prediction block by adopting a right lower intra-frame prediction method; at the encoding state, each encoding unit is firstly encoded, and all inter-frame prediction information is written into a code stream after the encoding is finished, and the secondary encoding is performed on the intra-frame prediction block; the right lowerintra-frame encoding is performed in the secondary encoding process; and the information of the intra-frame prediction block is written into the code stream after the secondary encoding is finished;at the decoding stage, all inter-frame prediction block decoding is finished; and then the right lower intra-frame decoding is performed on the intra-frame prediction block. Through the method disclosed by the invention, the intra-frame prediction precision can be increased, and the encoding efficiency of the intra-frame prediction block in the inter-frame prediction frame is improved.

Description

technical field [0001] The present invention relates to the field of video coding, in particular to a new intra-frame prediction method for intra-frame coding, which can be used for inter-frame prediction frames (including P frames (unidirectional prediction frames) and B frames (bidirectional prediction frames)). The intra-frame prediction block is used to improve the coding efficiency of the intra-frame prediction block. Background technique [0002] As people's requirements for video resolution increase, video and image content increasingly occupy information transmission bandwidth and storage capacity. How to further increase the compression ratio of video becomes a serious challenge. At present, there are many improved technologies for inter-frame prediction, but there are not many methods for intra-frame prediction. Due to the lack of inter-frame image reference, the compression efficiency cannot be effectively improved. [0003] Currently, existing intra-frame pred...

AI Technical Summary

Problems solved by technology

But the current intra prediction cannot use the point on the lower right as the reference pixel

Since the processing order of the coding units in the encoder and decoder is raster scanning or Z-scanning (Z-scan), it is impossible for the coding units on the right or below the current block to be reconstructed before the coding of the current block ends, so Pixels on the right and bottom of the current block cannot be referenced

This greatly reduces the information available for intra prediction and hinders the accuracy of intra prediction

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