Cable card - The Cable Card is the mechanism the industry has adopted to prevent the piracy of cable services. The cable company will periodically mail out new cable cards, ask their customers to plug them into the TV, and then disable the old cards, so anyone without a new cable card would lose service.
Multicasting - Term given to the sharing of the digital television channel among 2, 3, 4 or more individual programs and/or data services
Pixel - Pixel is actually two words jammed together _ picture and element. A pixel is a tiny sample of video information, the "little squares" that make up an overall picture.
Progressive Scanning - Some HD televisions use the "progressive" method of scanning, in which the whole picture is transmitted and presented on the screen in one pass. The resulting image is thus remarkably free of flicker and motion artefacts, appearing more "life-like". Some display types, such as LCD, plasma and DLP are inherently of the progressive scan type, while CRT's may be scanned progressively (as in computer monitors) or interlaced.
S-Video Connection - A method to interconnect video devices (such as a DVD player and the analog television) by sending the two signals luminance (Y) and an encoded color difference signal (C). The S-Video connection is made using a cable terminated in a small 4-pin connector (in some cases a 7 pin connector is used on computers to allow inclusion of an NTSC composite signal). S-video can greatly improve the picture when connecting SDTV or NTSC displays to a high quality video source such as DVDs.
Closed Captioning - A data stream included in broadcast signal that provides text and/or narrative description of dialogue, sounds, and other elements of the picture for viewers with visual or auditory impairments.
Letterbox - The full display of a wide aspect ratio 16 - 9 picture on a display of aspect ratio 4 - 3 will result in black bars above and below the picture. This arrangement is referred to as "Letterbox" and is often seen during movies shown on television.
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