Patent ID: 11908112
Assignee: ROKU, INC.
Field: Audio-visual technology (Electrical engineering)
Classification: CPC G  H | IPC G  H

Claim 7:
8. A system for dynamic tone mapping of video content, comprising:
a memory; and
at least one processor coupled to the memory and configured to:
receive histogram data associated with a first video signal representing a video program, wherein the first video signal has a first dynamic range and static metadata describing one or more brightness characteristics of the video program, wherein the histogram data comprises color values for a plurality of frames in the first video signal outputted by a display device;
determine a cumulative histogram for a scene in the video program based on the histogram data;
determine a near-brightest pixel for the scene in the video program based on the cumulative histogram, wherein the near-brightest pixel is a representative pixel value that defines a maximum target brightness value for proper display of the scene;
modify a tone mapping curve based on the near-brightest pixel and characteristics of the display device to generate a modified tone mapping curve; and
convert the first video signal based on the modified tone mapping curve to generate a second video signal having a second dynamic range that is less than the first dynamic range.