Apple 7.2 manual Glossary

Glossary

AIFF (Audio Interchange File Format) An audio file format used widely on the web.

aspect ratio The relationship between the height and width of an image.

audio channel Audio tracks can contain one or more channels of audio data. Each channel represents the sound directed to a particular speaker. For instance, stereo tracks contain two audio channels.

audio channel label Each audio channel may be labeled to specify where its sound should be directed. In a stereo track, the channels are typically labeled Left and Right. In a 5.1 surround sound track, there are labels for Left, Right, Center, Left Surround, Right Surround, and LFE Screen (the subwoofer).

bandwidth The capacity of a network connection, measured in bits or bytes per second (bps or Bps), for carrying data.

BMP A bitmapped graphics format used for still images in the Windows environment.

bitmapped Represented by pixels.

chapter list A list of “locations” in a movie. A user can choose an item from the chapter list to go to that point in the movie.

codec From “compressor/decompressor.” A codec is technology for compressing and decompressing data. Codecs can be implemented in software, hardware, or a combination of the two. Codecs can by “lossy” or “lossless,” depending on whether data is lost during compression.

compression The process of reducing the data size of a file.

Darwin Streaming Server A technology for delivering media over the Internet in real time. Based on the same code as Apple’s QuickTime Streaming Server (QTSS), Darwin Streaming Server is an open-source streaming server.

Glossary

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