Steinberg WaveLab Elements 7 Manual Page 411

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15.14 CD Frame 397
The name "Blu-ray" derives from the 405 nanometer blue-violet laser used to read the disk
(standard DVDs use a 650nm red laser, CDs use 780nm). The shorter wavelength allows for
five or 10 times more data storage than a DVD although a recent development has pushed
the storage capacity to 500GB on a single disc by using 20 layers. In addition to optical
improvements, Blu-ray Disks feature improvements in data encoding that further increase
their capacity.
Data CD/DVD
Glossary contents
15.14 CD Frame
In a Red Book CD-DA, the time format is commonly measured in minutes, seconds and
frames (mm:ss:ff), where one "frame" corresponds to one sector, or 1/75th of a second of
stereo sound. In editing and audio extraction, the frame is the smallest addressable time
interval for an audio CD, so that track start and end positions can only be defined in steps of
1/75 second duration.
Red Book CD-DA
Glossary contents
15.15 CD Pre-emphasis
CD pre-emphasis refers to process designed to increase, within a band of frequencies, the
magnitude of some (usually higher) frequencies compared to the magnitude of other (usually
lower) frequencies in order to improve the overall signal-to-noise ratio. Pre-emphasis aims to
minimize the adverse effects of attenuation distortion or the saturation of recording media in
subsequent parts of the system. When carried out properly, pre-emphasis enables a received
signal to more closely resemble the original or desired signal and produces fewer bit errors.
Pre-emphasis is commonly used in telecommunications, digital audio recording, record cut-
ting and in FM broadcasting transmissions. The presence of pre-emphasis on a track is
sometimes indicated by a tick in the column on the Import Audio CD dialog.
Import Audio CD
Glossary contents
15.16 CD Text
CD Text is an extension of the Red Book Compact Disc specifications standard for audio
CDs. The standard allows disc and track information (album name, song name and artist, for
example) to be embedded on a standards-compliant audio CD.
CD-Text information is usually stored in the lead-in area of the CD (where there is roughly
5KB of space available). Support for CD-Text is common, but not all CD players can display
it.
Red Book CD-DA
Glossary contents
WaveLab 7
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