METADATA DESCRIBING NOMINAL LIGHTING CONDITIONS OF A REFERENCE VIEWING ENVIRONMENT FOR VIDEO PLAYBACK

摘要

Innovations in the areas of generating, parsing, and using metadata that describes nominal lighting conditions of a reference viewing environment for video playback are presented herein. In various examples described herein, metadata includes parameters that describe the nominal lighting conditions (e.g., level of ambient light, color characteristics of ambient light) of a reference viewing environment. By conveying a representation of the nominal lighting conditions of the reference viewing environment (e.g., one assumed when mastering image content), a transmitter system can enable a receiver system to adapt its local display of the image content. Upon receiving image content and the metadata, the receiver system can identify characteristics of the actual viewing environment, use the metadata to determine whether the actual viewing environment matches the reference viewing environment, and, if not, adjust sample values of the image content, adjust a display device, or adjust lighting conditions of the actual viewing environment.

主权项

1. A computing system comprising:
a metadata generator configured to generate metadata that describes one or more nominal lighting conditions of a reference viewing environment for playback of video, wherein the metadata includes one or more of:
one or more parameters that specify a nominal level of ambient light in the reference viewing environment, the one or more parameters that specify the nominal level of ambient light including an indicator of light per unit of area; andone or more parameters that specify a nominal color characteristic of the ambient light in the reference viewing environment, the one or more parameters that specify the nominal color characteristic of ambient light including coordinates in a multi-dimensional mapping of values in a color space; and a buffer configured to store the metadata for output with encoded data for the video.