Surround Sound Formats; Dolby Digital; Dolby Digital Surround Ex; Dolby Pro Logic Ii And Dolby Surround - Pioneer VSX-C501-S Operating Instruction

Additional information
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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 Digital

You can identify Dolby Digital encoded source by the
following logo:
Dolby Digital is a multichannel digital audio coding
system widely used 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.

Dolby Digital Surround EX

Dolby Digital Surround EX (the EX stands for EXtended)
is an extension of Dolby Digital encoding whereby a
surround back channel is matrixed into the surround left/
right channels for 6.1 channel playback.

Dolby Pro Logic II and Dolby Surround

Dolby Pro Logic (and Pro Logic II) is a decoding system
that can extract four (five for Pro Logic II) channel
surround sound (front left/right, center, and surround
channels) from any stereo source.
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 sound.
You can identify a Dolby Surround encoded source by the
following logo:

DTS Digital Surround

You can identify a DTS Digital Surround encoded source
by the following logo:
DTS Digital Surround is a 5.1-channel audio encoding
system from Digital Theater Systems Inc. for DVD
soundtracks. Like Dolby Digital, it provides six discrete
channels of audio, including an LFE channel.
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DTS-ES

DTS-ES (the ES stands for Extended Sound) is a decoder
that is capable of decoding both DTS-ES Discrete 6.1 and
DTS-ES Matrix 6.1 encoded sources. DTS-ES Discrete 6.1
gives 'true' 6.1 channel sound, with a completely
separate (discrete) surround back channel. DTS-ES
Matrix 6.1 has a surround back channel matrixed into the
surround left/right channels.

DTS Neo:6

DTS Neo:6 can generate 6.1 channel surround sound
from any matrixed stereo source, such as video, TV, etc.
It uses both the channel information already encoded
into the source, as well as its own processing to
determine channel localization.

DTS 96/24

DTS 96/24 is an extension of the original DTS Digital
Surround which adds 96 kHz sampling rate (DTS Digital
Surround is already 24-bit).

PCM (Pulse Code Modulation)

PCM (also known as Linear PCM) is a digital audio
coding system that does not use compression to reduce
the amount of data needed to represent the analog audio.
PCM audio can be found on CDs and some DVDs.