Encoding method, decoding method, corresponding device, electronic equipment and storage medium

Abstract

The embodiment of the invention relates to the technical field of encoding and decoding, and discloses an encoding method, a decoding method, corresponding device, electronic equipment and a storage medium, the encoding method comprises the following steps: determining identification information of a to-be-encoded block according to all quantization coefficients of the to-be-encoded block, whereinthe identification information is a first identification or a second identification, the first identifier is used for identifying that all quantization coefficients of the to-be-coded block are non-zero coefficients, and the second identifier is used for identifying that zero coefficients exist in all quantization coefficients of the to-be-coded block, determining the context of the identification information, 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 of the to-be-encoded block, and if the identification information is the second identification, encoding the run length run and level of each non-zero 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 embodiments of the present application relate to the technical field of encoding and decoding, and specifically, the present application relates to an encoding method, a decoding method, a corresponding device, an electronic device, and a 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

Although this encoding method can ensure that each coefficient can be correctly decoded at the corresponding position of the decoder, there are still some redundancy in some cases.

For a coding block of size N*N', such as figure 2 As shown, where 1 represents a non-zero coefficient. At this time, each coefficient in the encoding block is a non-zero coefficient. According to the existing encoding method, it is necessary to additionally encode multiple runs with a value of 0, that is, even if the run value is 0 It must also be encoded, and the run value at this time cannot convey useful information, resulting in redundant encoding

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