| GLOSSARY |
Aspect Ratio | The ratio between the width and height of the TV picture on the screen. In a normal TV set the aspect ratio is 4 |
| to 3 (4:3). The aspect ratio in HDTV is 16:9, which resembles the aspect ratio in a movie theatre (Widescreen). |
| New TV systems support both 4:3 and 16:9 aspect ratio and can automatically switch between them. |
Audio Video (A/V) | A term often used when discussing a channel on a TV receiver or on video equipment, which has been |
| especially designed to accept VCR |
| within the TV set to prevent picture distortion and skewing. It is also used for |
| handle both types of signal. |
ATSC | ATSC: Advance Television Systems Committee. Formed to establish technical standards for advanced |
| television systems, including digital high definition television (HDTV). |
CVBS | Composite Video Baseband Signal. In broadcast television this refers to the video signal. |
| including the colour information and syncs. |
DTV | Digital television. Generic term that refers to all digital television formats, including |
| (HDTV) and |
Digital Tuner | A digital tuner serves as the decoder required to receive and display digital broadcasts. It can be included inside TV sets or |
| via a |
HDTV | , |
The generally agreed upon definition of HDTV is approximately twice the vertical and horizontal picture resolution of today s | |
| NTSC TV, which essentially makes the picture twice as sharp. HDTV also has a screen ratio of 16:9. HDTV offers reduced |
| motion artifacts (i.e. ghosting, dot crawl), and offers 5.1 independent channels of |
| referred to as |
NTSC | National Television System Committee.The organization that developed the analog television standard currently in use in the |
| U.S., Canada, and Japan. Now generally used to refer to that standard.The NTSC standard combines blue, red and green |
| signals modulated as an AM signal with an FM signal for audio. |
Progressive Scan | In Progressive Scanning all the horizontal scan lines are scanned on to the screen at one time.The Digital TV and HDTV |
| standards accept both Interlaced Scan and Progressive Scan broadcast and display methods. |
Resolution | Resolution: A measurement of the finest (smallest) detail that is visible in a video image.TV resolutions may be expressed as |
| number of pixels in an image, or more commonly as Total Number of (horizontally scanned) Lines used to create the image. |
| Standard Digital TV Resolutions: |
| SDTV: 480i - The picture is 704x480 pixels, 480p - The picture is 704x480 pixels. |
| HDTV: 720p - The picture is 1280x720 pixels, 1080i - The picture is 1920x1080 pixels, 1080p - The picture is 1920x1080 pixels. |
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