Home Theater Glossary: N

networked PVR: A cross between a personal video recorder (PVR) and video-on-demand (VoD), offered by a service provider such as a cable company. The hard drive that records and stores the video content you want to watch is located in the service provider's office.

notch filter: Separates the color and brightness parts of a video signal into their component parts and sends them to the appropriate internal circuitry. Not as effective as a comb filter.

NTSC: A technical standard developed by the National Television Standards Committee that is synonymous with analog TV — regular (non-HD) television programming.