Multicasting - Term given to the sharing of the digital television channel among 2, 3, 4 or more individual programs and/or data services
CDTV - Canadian Digital Television, a not-for-profit, government-approved body, with members from all sectors of the TV industry. CDTV is mandated to advise its members, Industry Canada and the CRTC on the roll out of DTV in Canada.
PSIP - Acronym for "Program and system information protocol", an ATSC DTV specification that enables a DTV receiver to identify the program information and to create on-screen electronic program guides and content advisories.
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.
Color temperature - This describes how white is displayed. Low temperature means slightly reddish, while high temperature means slightly bluish. Standard NTSC white corresponds to the color a glowing hot object would be at 6500ø K
DTV - "Digital television." This comprises all the components of digital television, including HDTV, SDTV, datacasting, and multicasting, falling under the standards established by the ATSC.
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.
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