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

Abstract

The embodiments of the present application relate to the technical field of encoding and decoding, and disclose an encoding method, a decoding method, a corresponding device, an electronic device, and a storage medium, wherein the encoding method includes: determining a block to be encoded according to all quantization coefficients of the block to be encoded Identification information, the identification information is a first identification or a second identification, the first identification is used to identify that all quantized coefficients of the block to be encoded are non-zero coefficients, and the second identification is used to identify that there are zero coefficients in all quantized coefficients of the block to be encoded Then determine the context of the identification information, and encode the identification information according to the context of the identification information; If the identification information is the first identification, then the value level of each quantization coefficient of the coding block is to be encoded; If the identification information is the second identification , the run and level of each non-zero coefficient of the block to be coded are coded. With the method provided by the embodiment of the present application, 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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