ATSC - "Advanced Television Systems Committee." Formed to establish technical standards for U.S. advanced television systems. ATSC is now used as the catch-all nomenclature for DTV broadcast standards.
Sub-channels - OTA DTV stations can show multiple programs simultaneously, subject to the 6 MHz bandwidth limit. This is called multicasting.
Compression - A method of reducing the number of bits required to store or transmit programs by the removal of redundant and/or non-critical information in the digital picture and sound. The DTV broadcasting standard for Canada, uses the MPEG-2 video and the AC-3 audio compression coding. Compression allows the delivery of more programs in a single channel.
Computer Input - Some HDTV sets have an input like SVGA or VGA that allows the TV sets to be connected to computers.
HDCP - (High-bandwidth Digital Content Protection) - This is a DVI decryption option. It will decode encrypted programs such as first-run movies. (Its real function is to prevent unauthorized copying of programs.)
8-VSB - Acronym for the transmission method used for over-the-air DTV broadcasting in Canada and the USA. Eight discreet amplitude level, "vestigial side-band" broadcast transmission technology. VSB is an analog modulation technique used to reduce the amount of spectrum needed to transmit information through cable TV, or terrestrial broadcasting.
SPDIF - (Sony/Philips Digital Interface) - This is digital audio, and can be either coaxial cable or fiber optic.
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