公开(公告)号：US10755392B2

公开(公告)日：2020-08-25

申请号：US15991711

申请日：2018-05-29

Applicant: MEDIATEK INC.

Inventor： Ying-Ru Chen ,  Wen-Fu Lee ,  Te-Hao Chang ,  Tai-Hsiang Huang

IPC: G06T5/00 ,  G06T5/40 ,  H04N5/57 ,  H04N7/01 ,  H04N9/69 ,  H04N5/202 ,  H04N5/235

Abstract: A video controller and method for performing tone-mapping of high-dynamic-range (HDR) video are provided. The video controller includes: a color-space converter, arranged to receive an input high-dynamic-range (HDR) video signal and perform a color space conversion on the input HDR video signal to obtain a first video signal having a first gamma curve; a de-gamma unit, arranged to apply a second gamma curve on the first video signal to compensate the first gamma curve to obtain a second video signal; a first histogram calculator, arranged to calculate a first histogram of a current frame of the second video signal; and a tone-mapping unit, arranged to apply a tone-mapping curve on the current frame of the second video signal according to a histogram of a previous frame of the second video signal to generate an output video signal.