Method and equipment for coding and decoding prediction mode, and network system

Abstract

The embodiment of the invention provides a method and equipment for coding and decoding a prediction mode, and a network system. The method for coding the prediction mode comprises the following steps of: confirming available prediction modes in a prediction mode set according to availability of adjacent blocks of an image block, wherein the adjacent blocks of the image block comprise an upper block, a left block and a left upper block of the image block, and at least one of the upper block, the left block and the left upper block is unavailable; and coding the prediction mode used by the image block to obtain a code word according to the number of the confirmed available predication modes, wherein the predication mode used by image block is one or more prediction modes in the available prediction modes. Due to the utilization of the technical scheme provided by the embodiment of the invention, codes of the prediction mode can occupy less bit number.

Description

technical field [0001] The present invention relates to the technical field of image coding, in particular to a prediction mode coding and decoding method, coding and decoding equipment and a network system. Background technique [0002] Block-based hybrid video coding technology is one of general video compression coding processing methods, mainly including intra coding (Intra coding) technology and inter coding (Inter coding) technology. Among them, the intra-frame coding technology uses spatial correlation, that is, uses the correlation between the current image block and adjacent blocks to predict the current image block by using multiple prediction directions to obtain the prediction residual, and then perform Transformation, quantization, entropy coding, and finally generate a compressed code stream. The intra-frame coding can be completed by the information of the current frame itself, without referring to the information of other frames. [0003] The adjacent blocks...

AI Technical Summary

Problems solved by technology

[0008] In the prior art, whether it is the H.264 standard or the UDI technology, when encoding the prediction mode, it does not distinguish between boundary blocks or internal blocks, and uses fixed-length codewords for encoding. For example, in the H.264 standard, there are 9 If there are 34 prediction modes in UDI technology, 6 bits are used to identify the selected prediction mode. In this way, more bits are used for coding the prediction mode, that is, for There is redundancy in the encoding of predictive modes

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