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Appendix
Table A8 – Surround Modes
Surround Mode Description Incoming Bitstream or Signal
Dolby Digital Provides up to five separate main audio channels and a dedicated low-frequency
effects (LFE) channel.
• Dolby Digital 1/0/.0 or .1, 2/0/.0 or .1, 3/0/.0 or .1,
2/1/.0 or .1, 2/2/.0 or .1, 3/2/.0 or .1
• Dolby Digital EX (played as 5.1)
• Dolby Digital Plus decoded and delivered via coaxial or optical
connection
Dolby Digital Plus An enhanced version of Dolby Digital encoded more efficiently, Dolby Digital Plus
has the capacity for additional discrete channels and for streaming audio from the
Internet, all with enhanced audio quality. Source material may be delivered via an
HDMI connection or decoded to Dolby Digital or PCM and transmitted via coaxial or
optical digital audio.
• Dolby Digital Plus via HDMI connection (source device decodes to
Dolby Digital when a coaxial or optical connection is used)
Dolby TrueHD Dolby TrueHD is an expansion of MLP Lossless
™
audio, the same format used on
DVD-Audio discs. Dolby TrueHD adds the features found in Dolby Digital, such as
night mode settings, while delivering fully lossless audio that is a true reproduction
of studio master recordings.
• Blu-ray Disc or HD-DVD encoded with Dolby TrueHD, delivered
via HDMI
Dolby Digital Stereo Delivers a 2-channel downmix of Dolby Digital materials.
• Dolby Digital 1/0/.0 or .1, 2/0/.0 or .1, 3/0/.0 or .1,
2/1/.0 or .1, 2/2/.0 or .1, 3/2/.0 or .1
• Dolby Digital EX
Dolby Pro Logic II Mode Group Analog decoder that derives five full-range, discrete main audio channels from
matrix surround-encoded or 2-channel analog sources. Four variants are available.
See below
Dolby Pro Logic II Movie Variant of Dolby Pro Logic II that is optimized for movie and television programs.
• Dolby Digital 2.0 or 2.1
• Analog (two-channel)
• Tuner
• PCM (32kHz, 44.1kHz, 48kHz, 96kHz)
Dolby Pro Logic II Music Variant of Dolby Pro Logic II that is optimized for music selections. Allows
adjustment of sound-field presentation in three dimensions:
• Center Width (adjusts width of vocal soundstage)
• Dimension (adjusts depth of soundstage)
• Panorama (adjusts wraparound surround effect)
• Dolby Digital 2.0 or 2.1
• Analog (two-channel)
• Tuner
• PCM (32kHz, 44.1kHz, 48kHz, 96kHz)
Dolby Pro Logic II Game Variant of Dolby Pro Logic II that emphasizes use of the surround channels and
subwoofer for total immersion in the video gaming experience.
• Dolby Digital 2.0 or 2.1
• Analog (two-channel)
• Tuner
• PCM (32kHz, 44.1kHz, 48kHz, 96kHz)
Dolby Pro Logic Original version of Dolby Pro Logic that steered a mono signal containing
information below 7kHz to the surround channels.
• Dolby Digital 2.0 or 2.1
• Analog (two-channel)
• Tuner
• PCM (32kHz, 44.1kHz, 48kHz, 96kHz)
Virtual Speaker Simulates 5.1 channels when only two speakers are present or a more enveloping
sound field is desired.
• Dolby Digital
• Analog (two-channel)
• Tuner
• PCM (32kHz, 44.1kHz or 48kHz)
DTS Digital
Using a different encoding/decoding method from Dolby Digital, DTS Digital
also provides up to five discrete main channels, plus an LFE channel.
• DTS 1/0/.0 or .1, 2/0/.0 or .1, 3/0/.0 or .1, 3/1/.0 or .1, 2/2/.0 or
.1, 3/2/.0 or .1
• DTS-ES Matrix (played as 5.1)
• DTS-ES Discrete (played as 5.1)
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