METHOD AND DEVICE FOR ENCODING AND DECODING VIDEO Russian patent published in 2023 - IPC H04N19/107 H04N19/11 H04N19/82 

FIELD: video encoding and decoding.

SUBSTANCE: method for incrementally encoding or decoding an entire area in an image over a plurality of images associated with an image. Proposed are encoders and decoders using gradual update, configured to decode, from the sequence header in the bitstream, a flag indicating whether gradual update is allowed; decoding the identification information to identify the first picture in the sequence to which the incremental update has been applied and determine the value of a picture order counter (POC) of the first picture; decoding the group size information to identify the group of pictures associated with the first picture to which the gradual update has been applied; determining a POC value of a second image corresponding to the last image belonging to the group based on the group size information; and determining a group of pictures associated with the first picture using the POC value of the first picture and the POC value of the second picture, where the identification information indicates that the gradual update is not applied to the first picture in the sequence, based on a flag indicating that the gradual update is not allowed.

EFFECT: improved decoding efficiency.

5 cl, 22 dwg