Intra-frame prediction method, encoder and storage device

Abstract

The invention discloses an intra-frame prediction method and device, an encoder and a storage device. The intra-frame method includes defining the reference lines at a first side, a second side, a third side and a fourth side of a current encoded block, wherein the first side and the second side are adjacent and in an encoding direction of the current encoded block, and the third side and the fourth side are adjacent and in an encoding reverse direction of the current encoded block; obtaining a projection prediction value corresponding to the compensation pixel in the current coding block in each angle mode on a reference line, wherein the projection prediction value comprises a first projection prediction value in an angle mode direction and a second projection prediction value in an angle mode reverse direction; and respectively carrying out weighted average on the first prediction value and the second prediction value of each compensation pixel to obtain an angle mode prediction value of each compensation pixel, the first prediction value being obtained by using the first projection prediction value, and the second prediction value being obtained by using the second projection prediction value. In this way, the spatial redundancy removal effect can be improved.

Description

technical field [0001] The present application relates to the field of video coding, and in particular, to an intra-frame prediction method, an encoder and a storage device. Background technique [0002] Because the amount of video image data is relatively large, it is usually necessary to encode and compress it before transmission or storage. The encoded data is called a video stream. Restricted by hardware and other conditions, such as limited storage space, limited transmission bandwidth, etc., the encoder always wants to keep the video stream as small as possible. [0003] Video coding mainly includes video acquisition, prediction, transform quantization and entropy coding. The prediction is divided into two parts: intra-frame prediction and inter-frame prediction, which are used to remove spatial redundancy and temporal redundancy respectively. [0004] At present, intra prediction mainly includes four processes of reference pixel acquisition, reference pixel filtering...

AI Technical Summary

Problems solved by technology

[0006] The present application provides an intra prediction method, encoder and storage device, which can solve the problem of limited removal effect of spatial redundancy in the intra prediction process in the prior art

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