Roxio DVDit Pro HD, User Manual

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Glossary
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channel
Part 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
point
A marker in the video stream. Chapter points let viewers navigate to specific locations
or scenes in the video. The DVD format allows up to 99 chapter points in a movie.
chapter
selection
menu
A DVD menu containing buttons that link to chapter points in a title. Also known as a
scene selection menu.
clip
A file containing a video and/or audio stream.
closed GOP
A 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, whereas streams with
open GOP s cannot.
CMF
Cutting Master Format.
codec
Co der/ dec oder or co mpressor/ dec ompressor. Software that is used to compress video,
audio, and graphics files to save space, and to decompress the files for playback.
color depth
See bit depth .
compressio
n
A method for making data files smaller. There are two forms of compression: lossless
and lossy. Lossless compression, such as that used in PNG image 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 images, and MP3 audio.
D1
Uncompressed component digital videotape format used for professional-quality
video.
data rate
See bit rate .
decode
To process digital data to reconstruct the original (analog) source.
digital
Represented by discrete numbers (digits). In general, digital is synonymous with
binary because computers store and process information encoded as combinations of
binary digits (bits). Compare with
analog .
DirectShow
A software standard developed by Microsoft Corporation for playing digital video
and audio on Windows-based PCs.
disc, disk
When spelled with a “c,” it refers to an optical disc such as a CD or DVD. When
spelled with a “k,” it refers to a computer disk drive or removable disk. (Computer
disks were developed in America and optical discs were developed in Europe and
Japan, which is why the spelling is different.)
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