4IntroductionDigital Signal and SoundThe analog television broadcast system that has been used in the United Statesfor the past 50 years transmits signals as electronic waves. These waves cansuffer degradation as the signal travels to your home. Additionally, the analogwaves are susceptible to interference from planes passing overhead, weather,and household appliances.Digital signals, in contrast to analog signals, can be reproduced precisely be-cause the images are transmitted and received using the computer language of1s and 0s. Such precision yields a signal that is capable of displaying studio-quality picture and Dolby Digital 5.1 channel sound.Other Key Features of owning an RCA HDTVThere are other HDTVs on the market. But your RCA HDTV has been designedwith features that will enhance your TV viewing experience, and featuresthat provide flexibility to build on the digital revolution that is taking place. Asummary of your TV’s most unique features follows. Go to Chapter 3 for moredetails on these and additional features.TruScan Digital Reality™ FeatureWith the Film Mode option turned on, the intelligent signal processing ofthe TruScan Digital Reality feature recognizes incoming video signals andprogressively converts them to achieve optimum digital picture performance.It also recognizes when original film sources have been modified and canautomatically convert the analog frame rate back to its original format to bringout the detail--a process commonly referred to as reverse 3:2 pulldown.DVI-HDTV InputLets you connect a component with a DVI (Digital Visual Interface) output. DVIprovides an uncompressed, digital video interface developed for high-bandwidthdigital connection. It supports the overlay of high-resolution graphics neededby some electronic program guide navigation and other interactive services.DVI, when combined with HDCP (High bandwidth Digital Content Protection)technology, creates a protected digital connection. The DVI-HDTV connectionis designed to display either progressive scan (480p or 720p) or HDTV (1080i)signals at a bandwidth of up to 1.78 Gigabits per second.