The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Mar. 26, 2019
Filed:
May. 11, 2016
Dolby Laboratories Licensing Corporation, San Francisco, CA (US);
Suzanne Farrell, Mountain View, CA (US);
Scott Daly, Kalama, WA (US);
Robin Atkins, San Jose, CA (US);
Timo Kunkel, Kensington, CA (US);
Gregory John Ward, Berkeley, CA (US);
Samir N. Hulyalkar, Los Gatos, CA (US);
Ning Xu, Irvine, CA (US);
Dolby Laboratories Licensing Corporation, San Francisco, CA (US);
Abstract
Systems and methods are disclosed for dynamically adjusting the backlight of a display during video playback. Given an input video stream and associated minimum, average, or maximum luminance values of the video frames in the video stream, values of a function of the frame min, mid, or max luminance values are filtered using a temporal filter to generate a filtered output value for each frame. The instantaneous dynamic range of a target display is determined based on the filtered output value and the minimum and maximum brightness values of the display. A backlight control level is computed based on the instantaneous dynamic range, and the input signal is tone mapped by a display management process to be displayed on the target display at the selected backlight level. The design of a temporal filter based on an exponential moving average filter and scene-change detection is presented.