Chapter 7 
Help & Assistance
SDTV (Standard Definition Television): A subset of the ATSC’s standard for Digital Television. SDTV refers to digital video signals that usually provide a picture quality similar to NTSC signals. The advantage of broadcasting SDTV instead of HDTV, is the ability to broadcast several SDTV programs in the spectrum space that is taken up by a single HDTV program.
SPDIF: a technical abbreviation for the optical cable you use to connect the DIGITAL AUDIO OUT jack on the TV to a Dolby Digital receiver that supports optical output.
Terrestrial: Broadcasts transmitted over the airwaves using powerful transmitters, and received via antennas. Also called
Video Input Channel: Technically, this isn’t channel, but the term is used when explaining that you need to tune your TV to a specific channel in order to watch content (a videotape, DVD, etc.) that is being played by a component that is connected to the TV. For example, if your DVD Player is connected to the TV’s INPUT1 jacks (VIDEO, AUDIO left and right), you won’t be able to watch the movie on the disc that’s playing in the DVD Player unless you tune the TV to the channel assigned to INPUT1 (in this TV it’s labelled VID1 on the screen).
The Auto Tuning feature eliminates the need to tune manually to the correct channel. The INPUT button on the remote control tunes the TV to the input channels (keep pressing INPUT to scroll through all of the video input channels).
Widescreen (also called 16:9): Widescreen refers to the ability of a TV to reproduce the video in the exact format it was created. This is just an easier way of writing the aspect ratio of High Definition Televisions so it appears in whole numbers instead of writing 1 x 1.77 (16 divided by 9 = 1.77). The aspect ratio for HDTV. The aspect ratio is the ratio of the width to the height — a 16:9 television with a width of 48 inches will have height of 27 inches.
Y Pb Pr (also called COMPONENT INPUT): These are the jacks used to provide the ultimate video. Three separate connectors connect to these jacks and separate the video into three parts. Y is the technical abbreviation for luminance (also called luma), and P stands for chrominance (also called chrominance). Luminance is the black and white part of the video signal. Chrominance is the color part of the video signal. P is the technical abbreviation for chrominance. Pb and Pr are formulas that explain how the color part of the signal is separated into two parts.
