Method for picture decoding, decoder and storage medium

A method for picture encoding, comprising:

• enabling a preset refreshing mode, the preset refreshing mode being configured to perform overlapping decoding on Coding Units (CUs);
• partitioning a current coded picture to obtain a Coding Tree Unit (CTU) corresponding to the current coded picture;
• generating a bitstream corresponding to the current coded picture by encoding the CTU, comprising:
• parsing a node in the CTU to determine a leaf parameter, the leaf parameter being configured to determine whether to partition the node;
• determining a state parameter and a flag parameter corresponding to the node, the state parameter being indicative of whether the node supports a refreshing process, and the flag parameter being indicative of whether the node enables the refreshing process;
• continuing to acquire a next node corresponding to the CTU according to a detection processing on the node according to the leaf parameter;
• and
• obtaining data of other CUs corresponding to the CTU,
• wherein the state parameter is a first state parameter, and wherein the node of the next layer corresponds to a second state parameter that is determined by parsing the next node and configured to determine whether the next node supports refreshing.

A non-transitory computer-readable storage medium, having a computer program and a bitstream stored thereon, wherein the computer program, when executed by a processor, enables the processor to perform steps of a method for picture encoding to generate the bitstream, wherein the method for picture encoding comprises:

• enabling a preset refreshing mode, the preset refreshing mode being configured to perform overlapping decoding on Coding Units (CUs);
• partitioning a current coded picture to obtain a Coding Tree Unit (CTU) corresponding to the current coded picture;
• generating the bitstream corresponding to the current coded picture by encoding the CTU, comprising:
• parsing a node in the CTU to determine a leaf parameter, the leaf parameter being configured to determine whether to partition the node;
• determining a state parameter and a flag parameter corresponding to the node, the state parameter being indicative of whether the node supports a refreshing process, and the flag parameter being indicative of whether the node enables the refreshing process;
• continuing to acquire a next node corresponding to the CTU according to a detection processing on the node according to the leaf parameter;
• and
• obtaining data of other CUs corresponding to the CTU,
• wherein the state parameter is a first state parameter, and wherein the node of the next layer corresponds to a second state parameter that is determined by parsing the next node and configured to determine whether the next node supports refreshing.