What does resolution refer to in terms of video?

Resolution in terms of video pertains to the number of pixels in each dimension that compose the video image. It is typically expressed in terms of width and height (e.g., 1920x1080), indicating how many pixels are present horizontally and vertically. A higher resolution means more pixels are used to create the image, resulting in greater detail and clarity. This is particularly important for displaying high-quality visuals and is a key factor in determining the overall picture quality.

The other options do not correctly define resolution in the context of video:

• The number of channels for audio relates to how audio is organized and processed, not video.
• The quality of the audio signal pertains to sound characteristics rather than pixel density.
• The frame rate of the video refers to how many frames are displayed per second rather than the number of pixels in the image.

Thus, focusing on the number of pixels directly addresses what resolution means in the context of video.