Which video signal type must be digitized before recording by a DVR?

Which video signal type must be digitized before recording by a DVR?

• A. Composite
• B. Component
• C. S-Video
• D. RGB

Answer: (A)

The key idea is that a DVR records digital video, so any incoming video signal that is analog must be converted to digital by an Analog-to-Digital Converter inside the DVR before it can be stored. Composite video is the most common analog CCTV signal input that enters DVRs; it carries all video information in a single channel, including sync, brightness, and color, which the DVR’s ADC converts into a digital stream for recording. While other formats like component, S-Video, and RGB also originate as analog and would be digitized by the DVR if they’re supported, composite is the standard type most directly associated with the need for digitization in the typical DVR workflow.

The key idea is that a DVR records digital video, so any incoming video signal that is analog must be converted to digital by an Analog-to-Digital Converter inside the DVR before it can be stored. Composite video is the most common analog CCTV signal input that enters DVRs; it carries all video information in a single channel, including sync, brightness, and color, which the DVR’s ADC converts into a digital stream for recording. While other formats like component, S-Video, and RGB also originate as analog and would be digitized by the DVR if they’re supported, composite is the standard type most directly associated with the need for digitization in the typical DVR workflow.