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dts Digital Surround
The "dts" multi-channel film sound system was originally
developed to replace analogue film soundtracks, using
digital recordings consisting of six discrete channels.
This system has now been further developed to provide
spatial sound reproduction in the home situation.
The six channels (5.1) are encoded / decoded in original
quality, i. e. with 20-bit resolution, and recorded using
only slight data compression. The 5.1 loudspeaker
configuration, currently the standard arrangement for
home cinema systems, is ideal for playback.
Dolby Digital Surround EX
Dolby Digital Ex is an expansion of the Dolby Digital
process. In order to optimise the spatial reproduction
further, the surround speakers are set up to the sides of
the listening position, and supplemented by one or two
additional back loudspeakers (if 2 back speakers are
used, both of them reproduce the same signal).
Dolby Digital EX generates six full-range channels from
the 5.1 signal. This is achieved by a matrix decoder
which produces a third surround channel from the two
surround channels of the 5.1 signal. Dolby Digital EX
works best with film and sound material encoded with
extra Dolby Digital EX.
Front Box
left
TV
Centre
30°
60°
45°
Surround
left
90°
Back speaker
left
dts ES / discrete
DTS ES is an expansion of the dts digital surround
process. The surround loudspeakers are supplemented
by back speakers in a similar way to Dolby Digital EX.
The sound signal is produced during the decoding
process from the surround channels by means of an
additional stage.
In contrast, DTS ES discrete produces the sound
channel for the back speakers from a sixth channel
which is recorded completely separately.
Front Box
right
Sub-woofer
30°
60°
45°
Surround
right
Back speaker
right
53
STEREO / MONO mode:
Stereo
mode for stereo reproduction
Note:
A multi-channel signal is converted into a stereo signal
(downmix), and reproduced via the main left and right
loudspeakers.
Mono
mode for mono reproduction
All channels are mixed down onto the Centre
loudspeaker *).
mode for two-channel TV sound
Mono I
Generally Channel I transmits the synchronised sound.
The signal from Channel I is reproduced via the Centre
loudspeaker
*);
Channel
suppressed.
Mono II
mode for two-channel TV sound
Generally Channel II transmits the original sound. The
signal from Channel II is reproduced via the Centre
loudspeaker
*);
Channel
suppressed.
Notes:
*) If no Centre speaker is present (see 'Loudspeaker
Menu'), the Centre channel is mixed onto the left and
right main speakers.
Not all signal sources (DVDs, CDs etc.) which are
encoded with Dolby Digital or DTS Digital Surround
contain the full 5.1 information. Even if the screen
indicates that a channel is present, that does not
necessarily mean that sound signals will constantly be
present at that loudspeaker.
In every mode of reproduction signals can be made
available on the sub-woofer channel, depending on the
loudspeakers selected in the 'Loudspeaker Menu'.
II
(original
sound)
is
I
(original
sound)
is
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