| ACATS |
Abbreviation for Advisory Committee on Advanced Television Service
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| ADI |
Abbreviation for Area of Dominant Influence as measured by the Arbitron rating service. The Arbitron rating service is the area serviced by a television station. ADI information is used to measure population coverage
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| AES |
Abbreviation for Audio Engineering Society which promotes standards in the professional audio industry.
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| Algorithm |
A formula used to simplify, modify, or predict data.
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| Allocations Table |
The FCC table that defines the frequency and power for each DTV channel.
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| Analog |
An electrical signal directly generated from a stimulus such as light striking a camera picture tube. DTV uses digital signals. Analog signals can be converted to digital signals through the using of an analog to digital converter.
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| Artifacts |
These are flaws in a picture such as jitter, blocking, or ghosts.
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| Aspect Ratio |
The ratio of television picture width to height. For HDTV the aspect ratio is 16:9 which is similar to a movie screen. The NTSC screens today are 4:3.
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| ATM |
Abbreviation for Asynchronous Transfer Mode. ATM is a technology based on high-speed packet switching. It is an ideal protocol for supporting professional video/audio and other complex multimedia applications. ATM is capable of data rates of up to 622 Mbits/s.
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| Bandwidth compression |
Reducing the bandwidth required for transmission of a given digital data rate. Compression makes it possible to reduce the raw data into a DTV signal.
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| Baud |
A unit of signaling speed equal to the number of signal events per second.
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| Bit stream |
A continuous series of bits transmitted on a line.
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| Byte |
A group of 8 data bits that are processed together.
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| Comb filter |
Separates chrominance (C) from luminance (Y) for maximum picture resolution and minimum picture distortion.
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| Compression |
The process of reducing the amount of data needed to represent a digital or audio signal.
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