Autodesk 64006-051108-9001 - Discreet Cleaner - Mac User Manual page 267

259
Intelecine — An inverse telecine process that removes the 3:2 pulldown frames added to movies
when 24 fps film source is converted to 29.97 fps video.
Intelligent Streaming — Windows Media scalability feature that enables a movie to be encoded
with multiple data rates in a single file and delivered to viewers over the Internet at an
appropriate data rate based on their connection speed.
Interframe — temporally compressed frame. Also called a difference or delta frame in
QuickTime. MPEG has two types of interframes — B-frames and P-frames.
Interlaced Video — each NTSC or PAL video frame consists of two fields. When displaying
video, an NTSC television draws one field every 1/59.94 of a second, and PAL televisions
display one field every 1/50 of a second. Our eyes put the two alternating fields together to
create 29.97 whole NTSC frames per second or 25 whole PAL frames per second. This effect is
undesirable for multimedia applications and should be removed (de-interlaced) prior to
compression.
Interleaving — alternating the video and audio data in the final file. Interleaving is required for
proper playback of movies because it enables the drive to read the file in a linear fashion and
still receive the separate audio and video data as needed. AVI has several different interleave
options, including interleaving each frame of video with the audio.
Internet — decentralized global computer network. The term Internet is often erroneously used
to refer to the World Wide Web, which is one specific application of the Internet; the Internet
encompasses much more than just the Web, including email, newsgroups and chat sites.
Intraframe — spatially compressed frame from which interframes are based. Also called a
keyframe in QuickTime and an I-frame in MPEG.
Intranet — large private network, often in a corporate environment.