Decoding method, encoding method, corresponding devices, electronic equipment and storage medium

Abstract

The invention provides an encoding method, a decoding method, corresponding devices, electronic equipment and a storage medium, the encoding method comprises: determining identification information ofa block to be encoded according to first M quantization coefficients of the block to be encoded, M>=1, wherein the identification information is a first identifier or a second identifier, the first identifier is used for identifying that the first M quantization coefficients are all non-zero coefficients, the second identifier is used for identifying that the second M is a non-zero coefficient and the second identifier is used for identifying that a zero coefficient exists in the first M quantization coefficients, determining the context of the identification information, and encoding the identification information according to the context of the identification information, if the identification information is the first identification,encoding the value level of each quantization coefficient in the first M quantization coefficients, and encoding the run length run and the level of each non-zero coefficient in other quantization coefficients except the first M quantization coefficients, and if the identification information is the second identification, encoding the run and level of each non-zero quantization coefficient of the to-be-encoded block. Through the method provided by the embodiment of the invention, the code stream can be effectively saved.

Description

technical field [0001] The present application relates to the technical field of encoding and decoding, and specifically, the present application relates to a decoding method, an encoding method, a corresponding device, electronic equipment, and a computer-readable storage medium. Background technique [0002] In the current video standard, the run-level coefficient encoding method often used is to bind and encode each non-zero coefficient with its previous zero coefficient. Even if the previous zero coefficient is 0, it is necessary to encode the run. Find the corresponding coefficient position at the decoder. Such as figure 1 In the schematic diagram of run-level coefficient encoding shown, the coefficients in the encoding block are encoded in a certain scanning order, such as figure 1 The scanning order from left to right shown in , specifically, when encoding, the level of the non-zero coefficient is encoded together with the number of consecutive zero coefficients run...

AI Technical Summary

Problems solved by technology

When multiple consecutive coefficients in front of it are all non-zero coefficients, according to the existing coding method, in the Figure 2a When the Zigzag scanning method shown in is used to encode the coefficients in the coding block, it is necessary to additionally encode multiple runs with a value of 0, that is, the encoding method of multiple consecutive coefficients is encoded in the form of (0, level) pairs , the run value at this time cannot convey useful information, resulting in redundant coding

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