Graphics blending for high dynamic range video

摘要

A method for merging graphics and high dynamic range video data is disclosed. In a video receiver, a display management process uses metadata to map input video data from a first dynamic range into the dynamic range of available graphics data. The remapped video signal is blended with the graphics data to generate a video composite signal. An inverse display management process uses the metadata to map the video composite signal to an output video signal with the first dynamic range. To alleviate perceptual tone-mapping jumps during video scene changes, a metadata transformer transforms the metadata to transformed so that on a television (TV) receiver metadata values transition smoothly between consecutive scenes. The TV receiver receives the output video signal and the transformed metadata to generate video data mapped to the dynamic range of the TV's display.

主权项

1. In a video receiver, a method for blending graphics data, the method comprising:
receiving input graphics data at a first dynamic range; receiving an input video signal at a second dynamic range, wherein the second dynamic range is different than the first dynamic range; receiving metadata for the input video data; applying a receiver display management process to the input video data and the received metadata to generate a first video signal at the first dynamic range; blending the first video signal with the input graphics data to generate a composite video signal; applying an inverse display management process to the composite video signal and the metadata to generate an output video signal at a third dynamic range; transforming the metadata using a metadata transform function to generate transformed metadata; and outputting the output video signal and the transformed metadata.