Operation Manual

263
Glossary
Last updated 10/4/2016
Blu-ray An optical disc format that has five times the storage capacity of DVDs. It can store 25GB on a single-layer disc
or 50GB on a dual-layer disc. It gets its name from the blue-violet laser it uses (as opposed to the red laser used by other
optical discs).
bluescreen See keying .
camcorder A digital video camera—that is, a device that records sequences of continuous pictures and generates a
signal for display or transfer of video footage.
capture The process of transferring source video from a camcorder or tape deck to a computer. If the source video is
analog, the capture process converts the video to digital.
capture card Sometimes called a capture or video board. A card installed into a computer and used to digitize video.
Or, for video that is already digitized, the device that simply transfers the file to the hard disk.
channel Stores color information for a computer graphic. Each graphic contains three separate channels (red, green,
and blue) that can be adjusted independently. Additional channels, called alpha channels, can be added to define
transparent areas.
chroma Short for chrominance .
chroma key A video effect that removes an area of specific color. This effect is often used during newscasts to insert a
weather map behind a meteorologist.
chrominance The color information in a video signal that comprises the hue (phase angle) and saturation (amplitude).
Cinepak® A commonly used codec for compression of video files on CD-ROM. Cinepak offers temporal and spatial
compression and data-rate limiting.
clip A digitized or captured portion of video, audio, or both.
codec Short for compressor/decompressor. A device or program that uses algorithms to compress video and sound
files, making them easier to work with and store, and to decompress files for playback. Common codecs convert analog
video signals to compressed digital video files (for example, MPEG) or analog sound signals to digital sound files (for
example, RealAudio®). See also
compression .
color bars See NTSC color bars .
color correction The process of altering the color of video, especially if it was shot under less than ideal conditions, such
as low light.
compositing The process of combining images to yield a resulting “composite” image.
compression The process of reducing data, such as in an audio or video file, into a form that requires less space.
current-time indicator In Adobe Premiere Elements, a gray pointer with a red line in Timeline and Properties, and
a gray pointer with a gray line in the Monitor. You drag this indicator to navigate through clips and identify specific
frames.
cut The simplest type of transition, in which the last frame of one clip is followed by the first frame of the next.
D1 Stands for Digital 1, a digital video format that has a 4:3 frame aspect ratio and a 0.9:1 pixel aspect ratio. D1 pixels
are rectangular (non-square), unlike analog pixels, which are square. D1 is an international TV standard: D1-NTSC
uses a frame size of 720 x 486 pixels, and D1-PAL uses a frame size of 720 x 576 pixels. See also
digital video and square-
pixel footage .
data rate The amount of data moved over a period of time (for example, 10 MB per second). Often used to describe a
hard drive's ability to retrieve and deliver information.
decode To divide an encoded video signal into its separate components. See also encode .
deinterlace To remove artifacts that result from interlaced video. See also interlacing .