User Guide

316 Glossary
channel Component of an audio track containing information that is heard through a
particular loudspeaker—for example, the left or right channel in a stereo soundtrack.
chapter selection menu DVD menu containing buttons that link to chapter points in the
video. Also known as a scene selection menu.
chapter point Marker in the video track that can be navigated to by pressing NEXT or
PREVIOUS on the remote control, or by choosing a menu button that has been linked.
clip File containing a video or audio stream.
closed GOP Group of pictures whose B- and P-pictures can reference other pictures only
within the same GOP. MPEG streams with closed GOPs can be edited. Compare with open
GOP.
codec Software or hardware used to compress video, audio, and graphics files to save space,
and to decompress the files for playback.
color depth See bit depth.
component video Analog or digital video system where the picture information is
maintained as three separate components—for example, red, green, and blue (see RGB), or
brightness and two color components (see YUV). Component video is considered superior
to composite video and S-video.
composite video Video system where all picture information is mixed into a single signal.
Compare with component video, S-video.
compression Method of making data files smaller. There are two forms of compression:
lossless and lossy. Lossless compression, such as that used in PNG graphics files, does not
change the data; it only removes redundancies. Lossy compression involves removing some
of the data, based on knowledge of how humans perceive images and sound. Examples of
lossy compression include MPEG video, JPEG graphics, and Dolby Digital audio.
D1 Uncompressed component digital videotape format used for professional-quality video.
data rate Rate at which data are transmitted or retrieved. Measured in bits per second (bps).
Equivalent to bit rate.