公开(公告)号：US20180376047A1

公开(公告)日：2018-12-27

申请号：US15986149

申请日：2018-05-22

Applicant: HUAWEI TECHNOLOGIES CO., LTD.

Inventor： Meng LI ,  Hai CHEN ,  Xiaozhen ZHENG ,  Jianhua ZHENG

IPC: H04N5/235 ,  G06F7/483 ,  G06T5/00 ,  H04N19/186 ,  H03M7/24

Abstract: The present disclosure discloses a method and an apparatus for processing image signal conversion. In one example method, an input primary color signal is obtained. The primary color signal is a numeric value of an optical signal corresponding to an image. The primary color signal is proportional to light intensity. Conversion processing is performed on the primary color signal to obtain processed image information. The image information is a numeric expression value of the image. The conversion processing includes at least the following processing: L ′ = a  ( pL ( p - 1 )  L + 1 ) m + b , where a, b, m, and p are rational numbers, L is the input primary color signal, and L′ is the processed image information.

公开(公告)号：US20180103258A1

公开(公告)日：2018-04-12

申请号：US15835771

申请日：2017-12-08

Applicant: HUAWEI TECHNOLOGIES CO., LTD.

Inventor： Hai CHEN ,  Meng LI ,  Xiaozhen ZHENG ,  Jianhua ZHENG

IPC: H04N19/186 ,  H04N19/196 ,  H04N19/182 ,  H04N19/124

CPC classification number: H04N19/186 ,  H04N19/124 ,  H04N19/176 ,  H04N19/182 ,  H04N19/196 ,  H04N19/46 ,  H04N19/98

Abstract: Embodiments of the present disclosure provide a video encoding method, a video decoding method, a video encoder, and a video decoder. The video encoding method includes: obtaining a to-be-encoded HDR image frame, where the HDR image frame includes multiple image blocks; determining, in multiple preset optical-electro transfer functions according to a statistical luminance value of each of the multiple image blocks, an optical-electro transfer function corresponding to the image block; performing optical-to-electrical conversion on the image block according to the optical-electro transfer function corresponding to the image block; and encoding the multiple image blocks on which the optical-to-electrical conversion has been performed. According to the embodiments of the present disclosure, one corresponding optical-electro transfer function is set for each image block, so as to improve a video encoding effect and better adapt to an existing video encoding framework.

公开(公告)号：US20210021874A1

公开(公告)日：2021-01-21

申请号：US17062110

申请日：2020-10-02

Applicant: Huawei Technologies Co., Ltd.

Inventor： Jianhua ZHENG ,  Quanhe YU ,  Meng LI ,  Hai CHEN ,  Chen-Xiong ZHANG

IPC: H04N19/98 ,  H04N19/70 ,  H04N19/13 ,  H04N19/186

Abstract: A video coding mechanism is disclosed. The mechanism includes at least one pre-encoder configured to pre-encode a received input video signal, and output a pre-encoded video signal. The mechanism also includes an encoder configured to obtain the pre-encoded video signal from the pre-encoder, and encode the pre-encoded video signal as a bitstream for transmitting the bitstream to decoder for decoding.

公开(公告)号：US20180103257A1

公开(公告)日：2018-04-12

申请号：US15836827

申请日：2017-12-09

Applicant: HUAWEI TECHNOLOGIES CO., LTD.

Inventor： Xiaozhen ZHENG ,  Jianhua ZHENG ,  Hai CHEN ,  Meng LI

IPC: H04N19/176 ,  H04N19/46 ,  H04N19/12 ,  H04N19/167

CPC classification number: H04N19/176 ,  H04N19/12 ,  H04N19/124 ,  H04N19/167 ,  H04N19/46 ,  H04N19/463 ,  H04N19/593 ,  H04N19/85

Abstract: Embodiments of the present disclosure provide an image encoding method, an image decoding method, an encoding device, and a decoding device. The method includes: determining a conversion function parameter of a current image block; determining a conversion function parameter of a neighboring image block corresponding to the current image block; determining, according to a correlation between the conversion function parameter of the current image block and the conversion function parameter of the neighboring image block, whether to perform merge encoding on the conversion function parameter of the current image block and the conversion function parameter of the neighboring image block, and determining a first indicator, where the first indicator is used to indicate whether to perform merge encoding on the conversion function parameter of the current image block and the conversion function parameter of the neighboring image block; and encoding the first indicator.