DVD Demystified

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Glossary
IDTV Improved-definition television. A television receiver that improves
the apparent quality of the picture from a standard video signal by
using techniques such as frame doubling, line doubling, and digital signal
processing.
IEC International Electrotechnical Commission. Refer to Appendix C,
“References and Information Sources.”
IED ID error correction. An error-detection code applied to each sector
ID on a DVD disc.
IEEE Institute of Electrical and Electronics Engineers, an electronics
standards body.
IEEE 1394 A standard for the transmission of digital data between
external peripherals, including consumer audio and video devices. Also
known as FireWire.
IFE In-flight entertainment.
I-MPEG Intraframe MPEG. An unofficial variation of MPEG video
encoding that uses only intraframe compression. I-MPEG is used by
DV equipment.
interframe Something that occurs between multiple frames of video.
Interframe compression takes temporal redundancy into account. Contrast
this with intraframe.
interlace A video scanning system in which alternating lines are transmitted,
so that half a picture is displayed each time the scanning beam
moves down the screen. An interlaced frame is made of two fields. Refer
to Chapter 3, “DVD Technology Primer.”)
interleave To arrange data in alternating chunks so that selected parts
can be extracted while other parts are skipped over, or so that each
chunk carries a piece of a different data stream.
interpolate To increase the pixels, scan lines, or pictures when scaling
an image or a video stream by averaging together adjacent pixels, lines,
or frames to create additional inserted pixels or frames. This generally
causes a softening of still images and a blurriness of motion images
because no new information is created. Compare this to filter.
intraframe Something that occurs within a single frame of video.
Intraframe compression does not reduce temporal redundancy but
enables each frame to be independently manipulated or accessed. See I
picture. Compare this to interframe.
inverse telecine The reverse of 2-3 pulldown, where the frames that
were duplicated to create 60-fields/second video from 24-frames/second
film source are removed. MPEG-2 video encoders usually apply an
inverse telecine process to convert 60-fields/second video into 24-
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