ATSC AT2016 Руководство пользователя - Страница 19

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5. Glossary

ATSC:

Advanced Television Systems Committee.

standards for U.S. advanced television systems. Also, the name given to the

8-VSB transmission standard itself.

NTSC:

"National Television Systems Committee" and the name of the current analog

transmission standard used in the U.S., which the committee created in 1953.

Analog TV:

Analog technology has been in use for the past 50 years to transmit conventional

TV signals to consumers. "Standard" television broadcasts in analog TV. Analog

signals vary continuously, creating fluctuations in color, brightness and quality.

Digital Television (DTV):

Digital TV is the umbrella term encompassing High-definition Television and

several other applications, including Standard Definition Television.

SDTV:

"Standard Definition Television." Digital formats that do not achieve the video

quality of HDTV, but are at least equal, or superior to, NTSC pictures. SDTV may

have either 4:3 or 16:9 aspect ratios, and it includes surround sound. Variations

of fps (frames per second), lines of resolution, and other factors of 480p and

480i make up the 12 SDTV formats in the ATSC standard.

HDTV:

"High-definition Television." This is the most superior video picture available in

Digital TV. In the U.S., the 1080i and 720p formats in a 16:9 aspect ratio are the

two acceptable HDTV formats. HDTV is a component of DTV.

Dolby Digital:

This is a digital surround sound technology used in movie theaters and upscale

home theater systems that enhances audio. Home theater components with this

technology work in conjunction with a "5.1-speaker" system (five speakers plus a

low-frequency subwoofer) to produce true-to-life audio that draws the listener

into the onscreen action. Six discreet audio channels are used: Left, Center,

Right, Left Rear (or side), Right Rear (or side), and a subwoofer -- LFE, "low

frequency effects" -- (considered the ". 1 " as it is limited in bandwidth).

Smart Antenna:

A smart antenna system combines multiple antenna elements with a signal-processing

capability to optimize its radiation and/or reception pattern automatically in response

to the signal environment.

Formed to establish technical