Glossary
© 2013 Harmonic Inc.
367
Ellipse 3000 r.3.0, Rev. B
Glossary
Numerics
10BASE-T
An IEEE standard, sometimes called “
Ethernet,”
that uses a twisted pair cable, with RJ-45
connectors, often connected in a star configuration through a hub. The maximum allowable
cable length is 328 feet. A 10BASE-T system operates at 10 Mbps.
See also
.
100BASE-T
An IEEE standard, sometimes called “
Ethernet,”
that supports data rates up to 100 Mbps, also
known as Fast Ethernet. 100BASE-T uses twisted pair cable.
See also
3:2 pulldown
A method that converts 24 frames per second motion picture film frame rate material to 30
frames per second interlaced video frame rate. This process is normally done by a
telecine
. It
refers to using two film frames to generate five video fields of interlaced video (1080i or
480i). The first frame is scanned three times to generate three video fields, the second frame
is scanned twice to generate two video fields, and the cadence continues. Note that every
fifth frame will have images from different film frames. These are termed “dirty frames” as
there may be significant differences in the two fields of video. The 3:2 process can also be
applied for 720P progressive video, this results in a 2:3 cadence of video frames, without the
“dirty frame” artifacts.
4:2:0
A component digital system that subsamples chroma components both vertically and
horizontally by a factor of two with respect to luma.
4:2:2
A component digital system that represents a luma component and a chroma component
subsampled horizontally by a factor of two with respect to luma.
A
AAA
Audio adapter used in the MV family of encoders. Can compress two stereo pairs of either
analog or digital audio into either MPEG-1 layer II or Dolby Digital
1
(AC-3) formats.
AAC LC
Advanced Audio Codec Low Complexity.
1.
Dolby, Dolby Digital, Dolby Digital Plus, and Dolby E are registered trademarks of Dolby Laboratories.
