Residual coding method and device, video coding method and device, and storage medium

A video encoding method, wherein

• in response to that a current picture is an inter predicted picture, a predicted picture of the current picture is obtained through inter prediction calculation;
• first residual data is calculated and obtained according to an original picture and the predicted picture of the current picture;
• and
• residual encoding is performed according to the following method:
• in response to that a current picture is an inter predicted picture, determining whether a residual of a background area in the current picture needs to be compensated;
• encoding first residual data in response to that the residual of the background area in the current picture needs to be compensated, and
• encoding second residual data in response to that the residual of the background area in the current picture does not need to be compensated;
• wherein the first residual data is residual data of a whole picture of the current picture, and the second residual data is residual data of an object area in the current picture, and
• wherein determining whether the residual of the background area in the current picture needs to be compensated comprises:
• determining whether the residual of the background area in the current picture needs to be compensated according to at least one of an impact factor calculated for the current picture or an impact factor calculated for an encoded inter predicted picture in a same group of pictures;
• wherein the impact factors are determined based on a difference between a reconstructed picture with compensating the residual of the background area and a reconstructed picture without compensating the residual of the background area.

A residual encoding device, comprising a processor and a memory storing a computer program executable by the processor, wherein the processor is configured to cause the residual encoding device to implement, when running the computer program, operations of:

• in response to that a current picture is an inter predicted picture, determining whether a residual of a background area in the current picture needs to be compensated;
• encoding first residual data in response to that the residual of the background area in the current picture needs to be compensated, and
• encoding second residual data in response to that the residual of the background area in the current picture does not need to be compensated;
• wherein the first residual data is residual data of a whole picture of the current picture, and the second residual data is residual data of an object area in the current picture, and
• wherein determining whether the residual of the background area in the current picture needs to be compensated comprises:
• determining whether the residual of the background area in the current picture needs to be compensated according to at least one of an impact factor calculated for the current picture or an impact factor calculated for an encoded inter predicted picture in a same group of pictures;
• wherein the impact factors are determined based on a difference between a reconstructed picture with compensating the residual of the background area and a reconstructed picture without compensating the residual of the background area.