Pioneer LX03 - Manual (Page 72)

Additional information 14
72
En
Surround sound formats
Below is a brief description of the main
surround sound formats you’ll find on DVDs,
satellite, cable and terrestrial broadcasts, and
video cassettes.
Dolby
The Dolby technologies are explained below.
See www.dolby.com for more detailed
information.
Dolby Digital
Dolby Digital is a multichannel digital audio
coding system widely used in cinemas, and in
the home for DVD and digital broadcast
soundtracks. It can deliver up to six discrete
audio channels, comprising five full range
channels and a special LFE (low frequency
effects) channel used mainly for deep,
rumbling sound effects; hence the term “5.1-
channel” Dolby Digital.
In addition to the format features above, Dolby
Digital decoders offer downmixing for
compatibility with mono, stereo and Dolby Pro
Logic audio from a number of bit rates and
channels. Another feature, called Dialog
Normalization, attenuates programs based on the
average level of dialog in a program relative to its
peak level (also known as Dialnorm) in order to
achieve uniform playback level.
Dolby Pro Logic II and Dolby Surround
Using the innovative “steering logic” circuit,
this system extracts surround sound from
sources as follows:
• Dolby Pro Logic – 4.1 channel sound
(mono surround) from any stereo source
• Dolby Pro Logic II – 5.1 channel sound
(stereo surround) from any stereo source
With two channel sources, the “.1” subwoofer
channel is generated by bass management in
the receiver.
Dolby Surround is an encoding system which
embeds surround sound information within a
stereo soundtrack, which a Dolby Pro Logic
decoder can then use for enhanced surround
listening with greater sound detail.
Manufactured under license from Dolby
Laboratories. Dolby, Pro Logic, and the double-D
symbol are trademarks of Dolby Laboratories.
DTS
The DTS technologies are explained below. See
www.dtstech.com for more detailed
information.
DTS Digital Surround
DTS Digital Surround is a 5.1-channel audio
coding system from DTS Inc. now widely used
for DVD-Video, DVD-Audio, 5.1 music discs,
digital broadcasts, and video games. It can
deliver up to six discrete audio channels,
comprising five full range channels, including
an LFE channel. Higher sound quality is
achieved through the use of a low compression
rate, and high rates of transmittance during
playback.
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