Inelectronics engineering,video processing is a particular case ofsignal processing, in particularimage processing, which often employsvideo filters and where the input and outputsignals arevideo files orvideo streams. Video processing techniques are used intelevision sets,VCRs,DVDs,video codecs,video players,video scalers and other devices. For example—commonly onlydesign and video processing is different in TV sets of different manufactures.[citation needed]
Video processors are often combined withvideo scalers to create a video processor thatimproves the apparent definition of video signals. They perform the following tasks:
These can either be in chip form, or as a stand-alone unit to be placed between a source device (like a DVD player or set-top-box) and a display with less-capable processing. The most widely recognized video processor companies in the market are:
All of these companies' chips are in devices ranging from DVD upconverting players (for Standard Definition) toHD DVD/Blu-ray Disc players and set-top boxes, to displays like plasmas,DLP (both front and rear projection),LCD (bothflat-panels andprojectors), andLCOS/"SXRD". Their chips are also becoming more available in stand alone devices (see "External links" below for links to a few of these).
