Arcam fmj AVR360 User Manual page 41

Multi-channel source modes
Digital multi-channel source material is normally
provided as '5.1 audio' . The '5.1 channels' comprise
of: left, centre and right front speakers, two surround
speakers and a low frequency effects (LFE) channel.
Since the LFE channel is not a full range channel, it is
referred to as '.1' .
Surround systems decode and reproduce the 5.1
channels directly. Dolby Digital EX and DTS-ES matrix
enhanced decoding systems create one extra rear
channel from information buried in the two surround
signals of the 5.1 source. These EX and ES enhanced
systems are sometimes referred to as '6.1' systems. This
extra surround back channel is normally reproduced
through two separate loudspeakers, creating a '7.1'
system.
DTS-ES discrete is a true '6.1' source, with six discretely
encoded channels, plus the '.1' LFE channel.
Dolby Digital Plus, Dolby TrueHD and DTS-HD are
high-resolution surround formats found on Blu-ray
discs
decoding modes
The modes given in the following table are available for
multi-channel digital sources.
Special modes such as DTS-ES 6.1 discrete, Dolby
Digital Plus, Dolby TrueHD and DTS-HD are only
available from the correct source material.
High resolution audio sources
Dolby TrueHD Provides up to 7.1 full channel at 96kHz, 24bit resolution, with potentially no
losses in the compression process. Data rates can be up to 18Mbps.
Dolby Digital Plus Provides up to 7.1 discrete channels of audio with less compression than
traditional Dolby Digital encoding. Data rates can be up to 6Mbps.
DTS-HD Master Audio Provides up to 7.1 full channel at 96kHz, 24bit resolution, with potentially no
losses in the compression process. Data rates can be up to 24.5Mbps.
For Dolby Digital sources
Dolby Digital 5.1 The most commonly used sound format for DVD video, and is also the
standard for US television. Dolby Digital 5.1 sources deliver sound with five
discrete full-range channels; left, centre, right, surround left, surround right,
plus a low frequency effects (LFE) channel.
Dolby Digital 5.1 Stereo Provides a stereo downmix of the source material for use with headphones.
Downmix
Dolby Digital EX This is an extension to Dolby Digital decoding that provides a 6-channel output
from a 5-channel input. The extra channel is the centre-surround channel (for
which the two surround back speakers are used), and is derived from the left
and right surround channel information. This decode mode should be used
only when the source material is 'Surround EX' encoded (which is normally
indicated on the disc packaging and should be detected automatically by the
AVr360), but may be used at other times if desired.
Dolby Digital 5.1 + Pro Logic This mode is used to derive information for the individual surround back
IIx Movie channels from the surround channels, using the Pro Logic IIx Movie decoder.
Dolby Digital 5.1 + Pro Logic This mode is used to derive information for the individual surround back
IIx Music channels from the surround channels, using the Pro Logic IIx Music decoder.
The controls for adjusting Pro Logic IIx Music in 'general Setup' can be used in
this mode.
For Dts sources
DTS 5.1 Less common than the Dolby Digital format, but generally recognised within
the audio industry as being of superior sound quality. DTS 5.1 delivers
surround sound with five full range channels plus an LFE channel.
DTS 5.1 Stereo Downmix Provides a stereo downmix of the source material for use with headphones.
DTS-ES 6.1 Matrix This is a 6.1 channel format based on DTS 5.1. It has the sixth channel matrix
encoded into the surround left and surround right channels. The sixth channel
is a surround centre channel and is directed to the surround back left and
surround back right speakers.
DTS-ES 6.1 Discrete This is a true discrete 6.1 channel sound format (unlike DTS-ES Matrix).
DTS-ES discrete mode operates only on sources with DTS-ES 6.1 discrete
audio encoding.
DTS96/24 Provides up to 5.1 channels of audio at 96kHz, 24bit resolution for superior
sound quality compared to standard DTS 5.1
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