United States Patent   Patent Number: 4,750,050
Belmares-Sarabia et al.  Date of Patent: Jun. 7,1988
ment for combining video signals. Two or more sets of color correction values may be stored in the storage and retrieval device. The sets of color correction values are retrieved from the storage and retrieval device and applied to the color correction circuits which then respond to the sets of color correction values in order to color correct the video signals produced by the video signal sources. The equipment for combining video signals combines the color corrected video signals to produce edited video signals, which may be recorded with a video recorder. In this fashion, a color corrected edited master is made. Such an editing system advantageously includes a control mechanism that automatically controls the various components of the system in response to a predetermined set of instructions. Furthermore, the control mechanism may permit one or more of the components of the system to be selectively controlled by an operator. One set of color correction values may contain a color balance correction, a hue correction, a sauration correction, and a luminance correction. Other corrections may be included, too. The same set of color correction values may be employed for every scene, or different sets of color correction values may be used for different scenes.