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.

公开(公告)号：US11962847B1

公开(公告)日：2024-04-16

申请号：US18054022

申请日：2022-11-09

Applicant: MEDIATEK INC.

Inventor： Chia-Hao Chang ,  You-Tsai Jeng ,  Kai-Wen Yeh ,  Yi-Cheng Chen ,  Te-Chuan Wang ,  Kai-Wen Cheng ,  Chin-Lung Lin ,  Tai-Lai Tung ,  Ko-Yin Lai

IPC: H04N21/4363 ,  H04N21/4405

CPC classification number: H04N21/4405 ,  H04N21/43635

Abstract: A channel hiatus correction method for an HDMI device is provided. A recovery code from scrambled data of the stream is obtained. A liner feedback shift register (LFSR) value of channels of the HDMI port is obtained based on the recovery code and the scrambled data of the stream. The stream is de-scrambled according to the LFSR value of the channels of the HDMI port. Video data is displayed according to the de-scrambled stream.

公开(公告)号：US11205401B1

公开(公告)日：2021-12-21

申请号：US17242409

申请日：2021-04-28

Applicant: MEDIATEK INC.

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

IPC: G09G5/12

Abstract: A power-saving method for switching High Definition Multimedia Interface (HDMI) ports on a sink device is provided. The sink device has a first HDMI port initially being enabled for displaying and a second HDMI port being disabled for displaying. The power-saving method includes the steps of using the reference signals to locate the VSYNC active edge in each frame generated by a source device connected to the second HDMI port; turning on the power to the second HDMI port during a power-on region corresponding to the VSYNC active edge in each frame and turning off power otherwise; obtaining information related to a high bandwidth digital content protection (HDCP) in the power-on region; and displaying video data from the source device based on the HDCP information when enabling the second HDMI port connected to the source device.