ENCODING AND DECODING PROCESS AND DEVICE Russian patent published in 2015 - IPC H04N19/50 

FIELD: physics, video.

SUBSTANCE: invention relates to TV image encoding means. This process the steps that follow. Encoder receives the data that make the largest encoding element LCU. Encoder defines the LCU quantisation depth parameter to be added to data to be encoded. Here the quantisation depth parameter is used to set the size of minimum image unit. The latter comprises independent quantisation parameter, QP to LCU. Encoder defines QT of every encoding element, CU to LCU, in compliance with the size of minimum image unit and size of every CU. Encoder calculate the difference of QP of every CU in compliance with QP of every CU and forecast of QP of every CU. encoder saves CU meeting the requirements of QP preset difference of said CU and encodes the quantisation depth parameter.

EFFECT: higher accuracy of control over bit transmission rate and compression efficiency in encoding/decoding.

26 cl, 11 dwg