公开(公告)号：US20190149823A1

公开(公告)日：2019-05-16

申请号：US16188587

申请日：2018-11-13

Applicant: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE

Inventor： Woong LIM ,  Seung-Hyun CHO ,  Joo-Young LEE ,  Youn-Hee KIM ,  Jin-Wuk SEOK ,  Jong-Ho KIM ,  Dae-Yeol LEE ,  Se-Yoon JEONG ,  Hui-Yong KIM ,  Jin-Soo CHOI

IPC: H04N19/124

CPC classification number: H04N19/124 ,  H04N19/70

Abstract: Disclosed herein are a video decoding method and apparatus and a video encoding method and apparatus. In quantization and dequantization, multiple quantization methods and multiple dequantization methods may be used. The multiple quantization methods include a variable-rate step quantization method and a fixed-rate step quantization method. The variable-rate step quantization method may be a quantization method in which an increment in a quantization step depending on an increase in a value of a quantization parameter by 1 is not fixed. The fixed-rate step quantization method may be a quantization method in which the increment in the quantization step depending on the increase of the value of the quantization parameter by 1 is fixed.