What does "resolution" refer to in network video?

In network video, "resolution" specifically refers to the amount of detail in a video image, which is typically expressed in pixels. Higher resolutions mean that more pixels are used to display the image, resulting in greater detail and clarity. For example, a common resolution for high-definition video is 1920x1080 pixels, indicating that the image is 1920 pixels wide and 1080 pixels tall. This translates to a higher level of detail compared to lower resolutions, such as 640x480 pixels.

Understanding resolution is crucial for assessing video quality. When installing or configuring network video systems, choosing the right resolution based on the viewing requirements is essential, as it can impact both the clarity of the recorded images and the storage requirements. Better resolution allows for better identification of objects and details in the footage, which is vital in security and monitoring applications.

The other options imply concepts related to network video systems but do not encapsulate what "resolution" fundamentally means. The number of cameras, the length of time footage is stored, and the type of compression are important operational aspects, but they are not definitions of resolution itself.