Which term describes the brightness component of a video signal?

Which term describes the brightness component of a video signal?

• A. Teleprompter
• B. Chrominance
• C. Character Generator
• D. Luminance

Answer: (D)

Brightness is captured by luminance. In video signals, luminance (often denoted Y or Y') carries the light-intensity information that defines how bright or dark each part of the image appears, forming the image’s structure and contrast. Color information is handled separately as chrominance, which carries hue and saturation. The other terms refer to different functions: a teleprompter displays script, a character generator adds text graphics, and chrominance is the color component—not the brightness. So the term that describes the brightness component is luminance.

Brightness is captured by luminance. In video signals, luminance (often denoted Y or Y') carries the light-intensity information that defines how bright or dark each part of the image appears, forming the image’s structure and contrast. Color information is handled separately as chrominance, which carries hue and saturation. The other terms refer to different functions: a teleprompter displays script, a character generator adds text graphics, and chrominance is the color component—not the brightness. So the term that describes the brightness component is luminance.