Additional information
Glossary
Analog audio
An electrical signal that directly represents sound. Compare this to digital audio which can be an electrical signal, but is an indirect representation of sound. See also Digital audio.
Aspect ratio
The width of a TV screen relative to its height. Conventional TVs are 4:3 (in other words, the screen is almost square); widescreen models are 16:9 (the screen is almost twice as wide as it is high).
Bonus Group (DVD-Audio only)
An ‘extra’ group on some
Browsable pictures (DVD-Audio only)
A feature of some
Dolby Digital
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Using a maximum of 5.1 channels of audio, this high quality surround system is used in many of the finer movie theaters around the world.
The
Dolby Pro Logic / Pro Logic II
A matrix decoding system that extracts 4.1 (Dolby Pro Logic) or 5.1 (Dolby Pro Logic II) channel surround sound from a two channel source.
DTS
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Digital audio
An indirect representation of sound by numbers. During recording, the sound is measured at discrete intervals (44,100 times a second for CD audio) by an
DTS stands for Digital Theater Systems. DTS is a surround system different from Dolby Digital that has become a popular surround sound format for movies.
Dynamic range
The difference between the quietest and loudest sounds possible in an audio signal (without distorting or getting lost in noise). Dolby Digital and DTS soundtracks are capable of a very wide dynamic range, deliv- ering dramatic
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