公开(公告)号：US20180309992A1

公开(公告)日：2018-10-25

申请号：US16019131

申请日：2018-06-26

Applicant: INTELLECTUAL DISCOVERY CO., LTD.

Inventor： Sung Chang LIM ,  Hui Yong KIM ,  Se Yoon JEONG ,  Jong Ho KIM ,  Ha Hyun LEE ,  Jin Ho LEE ,  Jin Soo CHOI ,  Jin Woong KIM

IPC: H04N19/124 ,  H04N19/13 ,  H04N19/157 ,  H04N19/186

CPC classification number: H04N19/124 ,  H04N19/105 ,  H04N19/117 ,  H04N19/122 ,  H04N19/13 ,  H04N19/15 ,  H04N19/157 ,  H04N19/159 ,  H04N19/174 ,  H04N19/176 ,  H04N19/186 ,  H04N19/43 ,  H04N19/46 ,  H04N19/463 ,  H04N19/61

Abstract: Disclosed are a method for determining a color difference component quantization parameter and a device using the method. Method for decoding an image can comprise the steps of: decoding a color difference component quantization parameter offset on the basis of size information of a transform unit; and calculating a color difference component quantization parameter index on the basis of the decoded color difference component quantization parameter offset. Therefore, the present invention enables effective quantization by applying different color difference component quantization parameters according to the size of the transform unit when executing the quantization.