IMAGE ENCODING METHOD BASED ON TRANSFORMATION AND DEVICE FOR ITS IMPLEMENTATION Russian patent published in 2023 - IPC H04N19/60 H04N19/645 H04N19/70 

FIELD: imagine encoding method.

SUBSTANCE: invention relates in particular to a method and a device for encoding an image based on transformation in an image coding system. According to the decoding method, the transformation coefficients for the current block are derived based on the residual information, determining whether there is a significant coefficient in the second area other than the first top-left area of the current block. The multiple transform selection index (MTS) is obtained by parsing the bitstream to identify if the significant coefficient is not in the second region. The residual sample is deduced by applying the MTS core derived based on the MTS index to the transform coefficients of the first region.

EFFECT: increase of the efficiency of video encoding.

12 cl, 23 dwg, 20 tbl