1080i Pronounced “ten-eighty interlaced” or “ten-eighty eye.” HDTV format in which 1080 scanning lines are presented in interlaced format.

3:2 pulldown A technique of translating video material originally shot on 24fps film to 30fps video. Also called “inverse telecine.”

3-way speaker A loudspeaker that divides the frequency spectrum into three parts (bass, midrange, treble) for reproduction through three or more drivers.

5C See “Digital Transmission Content Protection.”

5.1 channels The standard number of channels for encoding film soundtracks. The five channels are left, center, right, surround left, and surround right. The “.1” channel carries frequencies below about 100Hz and is reserved for bass effects.

5.1-channel ready An A/V receiver or controller with six discrete inputs that will accept the six discrete outputs from a Dolby Digital or DTS decoder. This feature allows you to add discrete digital decoding to a receiver or controller.

720p HDTV format in which the image is composed of 720 scanning lines presented in progressive format.