Encoding method, decoding method, bitstream, encoder, decoder, system and storage medium

Abstract

A decoding method includes: parsing bitstream to determine value of first syntax element identification information; determining, when the identification information indicates that preset selection network model is enabled to be used to perform model decision for current block, at least two output values according to preset selection network model. The at least two output values include first value corresponding to each candidate in-loop filter network model when in-loop filter network model is used for current block, and second value when in-loop filter network model is not used; determining, according to output values, target in-loop filter network model when in-loop filter network model is used for current block, or determining according to output values that in-loop filter network model is not used; and filtering, when in-loop filter network model is used for current block, current block using target in-loop filter network model, to obtain first reconstructed picture block of current block.