公开(公告)号：EP4346205A2

公开(公告)日：2024-04-03

申请号：EP24158549.6

申请日：2020-04-26

申请人： Huawei Technologies Co., Ltd.

发明人： IKONIN, Sergey Yurievich ,  CHERNYAK, Roman Igorevich ,  SOLOVYEV, Timofey Mikhailovich ,  KARABUTOV,, Alexander Alexandrovich ,  ALSHINA, Elena Alexandrovna ,  CHEN, Jianle

IPC分类号： H04N19/126

摘要： A method of obtaining a chrominance quantization parameter (QP) for chrominance components based on a luminance QP for luminance component, wherein the method is performed by a decoder, comprising parsing a received bitstream to obtain the luminance QP and information of a mapping function (/) which associates a QP index (QPi) to the chrominance QP (QPc); obtaining the QPi based at least in a part on the luminance QP; obtaining the mapping function based on the obtained information; and obtaining a QPc based on the obtained mapping function and the obtained QPi.

公开(公告)号：EP4346205A3

公开(公告)日：2024-04-24

申请号：EP24158549.6

申请日：2020-04-26

申请人： Huawei Technologies Co., Ltd.

发明人： IKONIN, Sergey Yurievich ,  CHERNYAK, Roman Igorevich ,  SOLOVYEV, Timofey Mikhailovich ,  KARABUTOV,, Alexander Alexandrovich ,  ALSHINA, Elena Alexandrovna ,  CHEN, Jianle

IPC分类号： H04N19/186 ,  H04N19/172 ,  H04N19/174 ,  H04N19/70 ,  H04N19/126

CPC分类号： H04N19/186 ,  H04N19/126 ,  H04N19/70 ,  H04N19/174 ,  H04N19/172

摘要： A method of obtaining a chrominance quantization parameter (QP) for chrominance components based on a luminance QP for luminance component, wherein the method is performed by a decoder, comprising parsing a received bitstream to obtain the luminance QP and information of a mapping function (/) which associates a QP index (QPi) to the chrominance QP (QPc); obtaining the QPi based at least in a part on the luminance QP; obtaining the mapping function based on the obtained information; and obtaining a QPc based on the obtained mapping function and the obtained QPi.