Decoding and encoding based on adaptive intra-frame refreshing mechanism

An encoding method based on an adaptive intra refresh mechanism, the encoding method comprising:

• determining whether a current frame supports an adaptive intra refresh technology;
• if the current frame supports the adaptive intra refresh technology, carrying an adaptive intra refresh video extension identifier, ID, and virtual boundary position information of the current frame in extension data of the current frame, wherein the virtual boundary position information is for indicating a position of a virtual boundary, and the virtual boundary is at least for distinguishing a refreshed area from an unrefreshed area in the current frame;
• if the current frame does not support the adaptive intra refresh technology, carrying no adaptive intra refresh video extension ID in the extension data of the current frame;
• or carrying the adaptive intra refresh video extension ID in the extension data of the current frame, and a value of the virtual boundary position information carried in the extension data of the current frame is capable of indicating whether the adaptive intra refresh technology is supported,
• wherein the virtual boundary position information comprises first virtual boundary position information and second virtual boundary position information, and
• wherein the first virtual boundary position information is for indicating a pixel position of the virtual boundary in a horizontal direction of the current frame, and the second virtual boundary position information is for indicating a pixel position of the virtual boundary in a vertical direction of the current frame.

A decoding device, comprising:

• at least one processor;
• and
• at least one memory configured to store instructions executable by the at least one processor,
• wherein the at least one processor is configured to execute the instructions to perform operations comprising:
• receiving a bit stream of a current frame;
• if there is extension data in the bit stream of the current frame and the extension data carries an adaptive intra refresh video extension identifier, ID, obtaining virtual boundary position information carried in the extension data, wherein the virtual boundary position information is for indicating a position of a virtual boundary, and the virtual boundary is at least for distinguishing a refreshed area from an unrefreshed area in the current frame;
• and determining whether the current frame supports an adaptive intra refresh technology based on the virtual boundary position information;
• if there is no adaptive intra refresh video extension ID in the extension data in the bit stream of the current frame, determining that the current frame does not support the adaptive intra refresh technology,
• wherein the virtual boundary position information comprises first virtual boundary position information and second virtual boundary position information, and
• wherein the first virtual boundary position information is for indicating a pixel position of the virtual boundary in a horizontal direction of the current frame, and the second virtual boundary position information is for indicating a pixel position of the virtual boundary in a vertical direction of the current frame.