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iTV DICTIONARY
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The following
is a list terms commonly used in the interactiveTV industry. If you
find any incorrect information to be incorrect or outdated, please email
us to correct.
**Note:
There are many different kinds of interactive TV technologies and services.
The definitions below will clarify and help you differentiate between
such things as "enhanced TV", "individualized TV", "hypervideo", "NetTV",
"personal TV", and may other terms.
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Mb
or MEGABIT
10^6 bits of information (usually used to express a data transfer
rate; as in, 1 megabit/second = 1Mbps).
MHZ- Megahertz
A frequency equal to one million Hertz, or cycles per second.
MPEG- Motion Pictures Expert Group
A proposed International Standards organization (IS) standard for
digital video and audio compression for moving images. Responsible
for creating standards 1, 2 and 4.
MPEG
1 1/4 broadcast quality which translates to 352 x 240 pixels. Typically
compressed at 1.5 Mbs.
MPEG-2
Similar to MPEG-1, but includes extensions to cover a wider range
of applications. MPEG-2 translates to 704 x 480 pixels at 30 frames
per second in North America and 704 x 576 fps at 25 fps in Europe.
Typically compressed at higher than 5 Mbs. The primary application
targeted during the MPEG-2 definition process was the all-digital
transmission of broadcast TV quality video.
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Definitions
provided by:
InteractiveTV Today 
