Patent ID: 11967345
Assignee: GRASS VALLEY LIMITED
Field: Audio-visual technology (Electrical engineering)
Classification: CPC G | IPC G

Claim 12:
13. A system for rendering key and fill video streams for video processing, the system comprising:
an encoder configured to encode each frame of a sequence of images to generate encoded composite frames that each contain a fill portion that corresponds to video data of the sequence of images and a key portion that is monochrome and defines respective transparency levels, such that each encoded composite frame includes both the fill portion and the key portion; and
a renderer configured to receive a stream of the encoded composite frames and configured to decode each encoded composite frame to extract pixel values from the fill portion and respective transparency levels from the key portion, and further configured to apply the respectively transparency levels to the corresponding extracted pixel values to generate an output video comprising modified frames to be displayed by a video processing device, wherein the fill portion comprises a higher resolution than a resolution of the key portion.