公开(公告)号：US20210160514A1

公开(公告)日：2021-05-27

申请号：US17166364

申请日：2021-02-03

Applicant: Huawei Technologies Co., Ltd.

Inventor： Xiang Ma ,  Haltao Yang ,  Jianle Chen

IPC: H04N19/186 ,  H04N19/176

Abstract: The present disclosure provides a chroma block prediction method and a device. The method includes: parsing a bitstream to obtain first indication information; downsampling a first luma block by a first filter when a value of the first indication information is a first value or by using a second filter when a value of the first indication information is a second value, to obtain a second luma block; obtaining a plurality of chroma samples and a plurality of luma samples; obtaining linear model coefficients based on the plurality of chroma samples and the plurality of luma samples; and obtaining a prediction value of the current chroma block based on the second luma block and the linear model coefficients.