What are Scalers & Upconverters? How are they used? Categories Cross Reference Table

	Step 2: How are they used?
	Scalers and upconverters typically are used to match a video signal to the resolution of a display, or to increase the perceived quality of a video image. When a standard television signal is displayed on a large, high resolution projection system, the image becomes over expanded and the individual scan lines are visible. Scalers and upconverters can eliminate these scan lines and create a clearer, smoother, and brighter image. When used with digital projectors, scalers and upconverters take a standard digital signal, decode it, and use advanced digital signal processing technology to scale the image to the optimal or native resolution of a display device. Furthermore, as scalers convert all signals to RGBHV, communicationswith different signal types, as well as the number of cables input into the projector, are reduced resulting in simplified set-up and cable installations. In the diagram, video signals from a VCR,a DVD player, and a DSS receiver are running through a digital video scaler (DVS 406). These inputs are then scaled up for display by a DLP projector and plasma display.