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Glossary
Analog:
A signal that is not digital. Most VCRs, radio/television broadcasting, AV in/out, S-VIDEO, and stereos are analog.
Computers are digital, dealing in ones and zeros. Information from an analog source must be digitized to be used on a
computer.
Capture:
The recording of video or images to a computer hard disk.
CBR (Constant Bit-Rate):
Constant Bit Rate (CBR) encoding is an encoding method that varies the quality level in order to ensure a consistent bit
rate throughout an encoded file.
Clip:
A short section or part of a movie. A clip can be audio, video, still images or a title.
Codec:
COmpress and DECompress. All video on a computer uses a special algorithm or program to process video. This
program is called a codec.
Compression:
Making a file smaller by removing redundant data. Nearly all digital video is compressed in some way or another.
Compression is achieved through a codec.
Data Rate:
The amount of data per second that is transferred from one part of your computer to another. In digital video, the data
rate of your source is very important: CD-ROMs have lower data rates than hard disks. The data rate of the Internet is
very low.
Digital:
Computer data consisting of ones and zeros. Contrast digital information with analog.
Driver:
A software program that controls the connection between a specific device and a computer.
Frame:
A single image in a movie.
Frame Rate:
The number of frames per second in a video. NTSC video is commonly 29.97 frames per second (fps), but smaller
video files can be created on the computer by using lower frame rates, like 15 fps (not suitable for VCD or DVD).
USB Instant DVD for Mac 58
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