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Known also as DD (3/3) or DD 6.1, an enhanced form of Dolby Digital. On top
of the discretely encoded 5.1 channels DD EX provides an extra 6th channel
(Surround Back, giving 6.1) matrix encoded into the rear surrounds for
greater image depth and more solid sound localisation behind the listener.
DD EX requires a DD EX encoded disc. DD EX is backwards compatible with
DD 5.1 decoding. If DD EX is decoded as normal DD the Surround Back
signal will be present in both Left and Right Rear Surrounds (forming a
phantom rear centre). It can also be decoded as 7.1 by sending the Surround
Back decode to both the Surround Back Left and Right speakers (forming
two mono Back Surrounds).
Known also as DTS (3/3) Matrix, an enhanced form of DTS. On top of the
discretely encoded 5.1 channels DTS ES also provides an extra 6th channel
(Surround Back giving 6.1), matrix encoded into the rear surrounds for
greater image depth and more solid sound localisation behind the listener.
DTS ES requires a DTS ES encoded disc. DTS ES material is backwards
compatible with DTS 5.1 decoding. If DTS ES is decoded as normal DTS the
Surround Back signal will be present in both Left and Right Rear Surrounds
(forming a phantom rear centre). It can also be decoded as 7.1 by sending
the Surround Back decode to the both the Surround Back Left and Right
speakers (forming two mono Back Surrounds).
Another enhanced form of DTS, also known as DTS (3/3) Discrete or DTS
ES Discrete 6.1. DTS ES Discrete also provides an extra channel (Surround
Back) for greater image depth and more solid sound localisation behind
the listener, however in this case extra data is included in the bitstream so
that all channels are discretely encoded. The Surround Back has greater
separation from the other channels than is possible with matrix encoded
technologies. DTS-ES Discrete requires a DTS-ES Discrete encoded disc.
DTS ES Discrete is backwards compatible with both DTS 5.1 and DTS ES
Matrix 6.1 decoding. If DTS ES Discrete is decoded as normal DTS the
Surround Back signal will be present in both Left and Right Rear Surrounds
(forming a phantom rear centre). If DTS ES Discrete is decoded with DTS
ES Matrix the Surround Back signal will be decoded separately (i.e. as 6.1)
but by a matrix process, which will give the same channel separation as if
the source disc were actually DTS ES Matrix (but not as good as DTS EX
Discrete).
It can also be decoded as 7.1 by sending the Surround Back decode to
both the Surround Back Left and Right speakers (forming two mono Back
Surrounds).
The replacement for the original Dolby Dolby Pro Logic, Dolby Pro Logic II is
a technology where 5 channels (Front Left, Front Right, Centre, Surround
Left, Surround Right) are encoded into a Stereo mix by an analogue matrix
process. Dolby Pro Logic II material can be played back by normal Stereo
equipment (as Stereo) or decoded into 5 channel surround-sound.
Dolby Pro Logic II is compatible with the earlier 4 channel (Left, Centre,
Right and mono Surround) Dolby Pro Logic system (which was the decoding
counterpart to Dolby Surround encoding) as used widely on Video tapes, TV
broadcasts and earlier films.
Note: Dolby Pro Logic does not include a Low Frequency Effects channel for
the Subwoofer, but the 551R V2 can create a Subwoofer output (for 5.1)
via Bass management. Refer to the 'Tone/Subconfiguration' section in the
'Operating instructions' part of this manual.
A newer version of Dolby Pro Logic II which is able to recreate 7 discrete
surround sound channels from suitable encoded stereo source material.
Dolby Pro Logic IIx also has modes for post processing either Stereo material
or 5.1 material into 7 channels whether or not it has been Dolby Pro Logic
IIx encoded. When 5.1 decoding is required, Dolby Pro Logic II decoding will
always be used by the 551R V2 in place of Dolby Pro Logic IIx as IIx only
works for 7 channel output.
Note: Dolby Pro Logic IIx does not include a Low Frequency Effects channel
for the Subwoofer, but the 551R V2 can create a Subwoofer output (for 7.1)
via Bass management. Refer to the 'Tone/Sub configuration' section in the
'Operating instructions' part of this manual.
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A DTS technology which is able to recreate 6 channel (Left Front, Right
Front, Centre, Left Surround, Right Surround, Surround Back ) surround
sound from suitable analogue matrix encoded stereo source material. DTS
Neo:6 material can be played back by normal Stereo equipment (as Stereo)
or decoded into 7.1 by sending the Surround Back decode to the both the
Surround Back Left and Right speakers (forming two mono Back Surrounds).
Note: Neo:6 does not include a Low Frequency Effects channel for
the Subwoofer, but the 551R V2 can create a Subwoofer output via
Bass management. Refer to the 'Tone/Subconfiguration' section in the
'Operating instructions' part of this manual.
A DTS technology that provides 5.1 channels of 96kHz / 24bit audio (along
with video if required) on DVD-Video and DVD-Audio (video zone) discs (when
suitably encoded in DTS 96/24). DVD players which allow 'DTS digital out'
pass the DTS 96/24 bitstream over S/P DIF or HDMI for decoding in the
551R V2.
DSP modes
These modes allow a surround-sound experience from source material that
has no encoding at all. The surround sound effect is achieved by Digital
Signal Processing of the Analogue or Digital stereo source used. Five modes
are possible: Movie, Music, Room, Theatre and Hall.
Stereo/Stereo + Sub
Only the Front Left and Front Right speakers (and subwoofer if selected)
have output in this mode. If an analogue source is selected it will be
converted to digital via 24 bit A/D converters to allow digital domain sub
creation and bass/treble controls.
If a digital source is selected the 551R V2 will be processing either LPCM
stereo (from the digital outputs of a CD player for instance) or a Stereo
downmix of DD or DTS material (from the digital output of a DVD player for
instance).
Other modes
Analogue Stereo Direct
Selects the analogue inputs for the current source directly with no A/D
conversion, DSP processing, Bass/Treble or subwoofer channel active.
Provides the very best fidelity for analogue Hi-Fi source equipment. In this
mode the 551R V2 is acting just like a normal Hi-Fi integrated amplifier.
Multi Channel PCM
Some playback devices (in particular Blu-ray players) are able to decode
some of the above formats themselves internally and then output the
decoded audio as Multi Channel PCM to the 551R V2. In addition Blu-ray
disks can support native unencoded Multi Channel PCM soundtracks (of up
to 8 channels) on the disc itself. In either case if your player can output these
over HDMI the 551R V2 is able to receive them in Multi-Channel PCM mode.
551R V2
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