Encoding method and device and decoding method and device

Abstract

The invention discloses an encoding method and device and a decoding method and device, and belongs to the technical field of data processing. The method comprises the steps of obtaining an encoding stream of a current block; determining whether the current block supports an intra-frame sub-block division mode or not according to information carried in the coding stream, and determining a target sub-block division mode from the sub-block division modes supported by the current block if the current block supports the intra-frame sub-block division mode; determining a target prediction mode of the current block from the prediction modes of the candidate prediction mode list of the current block; decoding the current block according to the target prediction mode and the target sub-block division mode; wherein when it is determined that the size of the current block conforms to the first size information according to the information carried in the coding stream, the current block does notsupport the intra-frame sub-block division mode; and when determing that the size of the current block conforms to the second size information according to the information carried in the coding stream, enabling the current block to support the intra-frame sub-block division mode. The problem of relatively high processing cost of hardware on the sub-blocks divided by a certain division mode can beavoided.

Description

technical field [0001] The present application relates to the technical field of data processing, and in particular to an encoding method, decoding method and device. Background technique [0002] At present, ISP (Intra sub-block sub-partitions) technology is widely used in image coding. The principle of this ISP technology is to divide an image block into multiple sub-blocks to predict based on the multiple sub-blocks. , transform, quantize, and encode a series of processes. [0003] In some embodiments, the division mode of the image block supporting the ISP technology generally includes a horizontal mode and a vertical mode. For example, a 16*8 image block can be divided into four 16*2 sub-blocks horizontally and four 4*8 sub-blocks vertically. In addition, for a 4*8 image block, it can be divided into two 4*4 blocks horizontally, and can be divided into two 2*8 sub-blocks vertically. Thereafter, a series of processing may be performed by hardware based on the obtained...

AI Technical Summary

Problems solved by technology

[0005] The embodiment of the present application provides an encoding method, a decoding method, a device, a device, and a storage medium, which can solve the problem in the related art that hardware handles sub-blocks of some sizes relatively large

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