公开(公告)号：US11770583B1

公开(公告)日：2023-09-26

申请号：US17814024

申请日：2022-07-21

Applicant: MEDIATEK INC.

Inventor： You-Tsai Jeng ,  Chia-Hao Chang ,  Yi-Cheng Chen ,  Kai-Wen Yeh ,  Kuo-Chang Cheng ,  Chi-Chih Chen ,  Szu-Hsiang Lai ,  Chin-Lung Lin ,  Kai-Wen Cheng ,  Te-Chuan Wang ,  Ko-Yin Lai ,  Keng-Lon Lei ,  Tai-Lai Tung

IPC: H04N5/63 ,  H04N21/436 ,  H04N21/4363

CPC classification number: H04N21/43635 ,  H04N5/63

Abstract: A power-saving method for an HDMI device is provided. The method includes detecting color depth information of video data from an HDMI source which is connected to the HDMI port, deriving a horizontal length for each line by fragment of a picture frame according to the color depth information, generating a plurality of synchronization signals according to the horizontal length for each line by fragment, and powering on the HDMI port, according to the synchronization signals, for a predetermined time period to obtain encrypted information from the HDMI source, and powering off the HDMI port after the predetermined time period.