IMAGE CODING METHOD, IMAGE DECODING METHOD, IMAGE CODING DEVICE, IMAGE DECODING DEVICE AND IMAGE CODING AND DECODING DEVICE Russian patent published in 2024 - IPC H04N19/70 H04N19/13 H04N19/91 

FIELD: image encoding.

SUBSTANCE: image to be encoded is divided into a plurality of blocks to form target blocks. The predicted block is formed. The predicted block is subtracted from the target block to form a residual block. The residual block is converted and quantized to form a quantized block. Inverse quantization and inverse transformation of the quantized block are performed to form a local reconstructed residual block. A reconstructed block is formed by adding the reconstructed residual block and the predicted block. A SAO type parameter is determined for the SAO value of the reconstructed block, wherein the SAO type parameter indicates whether the SAO value is a boundary offset value or a range offset value, and the SAO value is to be added to the pixel value of the reconstructed image. A set of bins is found that represents an integer indicating the magnitude of the SAO value.

EFFECT: improved efficiency of image encoding.

1 cl, 38 dwg